JP2017191850A - Uv irradiator for uv sensitivity measurement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized ultraviolet irradiator for measuring ultraviolet sensitivity by which ultraviolet sensitivity measurement can be performed with high reliability. An ultraviolet irradiator for measuring ultraviolet sensitivity comprises a plurality of types of LED elements having different emission center wavelengths, and has continuous spectrum light in the wavelength range of 290 to 320 nm and continuous spectrum light in the wavelength range of 320 to 400 nm. From at least one of the light source section for emitting continuous spectrum light, and a drive section having a control mechanism for independently controlling the drive of each of the plurality of types of LED elements forming the light source section, Is emitted to the irradiation site on the human skin. [Selection diagram] Figure 1

Description

  The present invention relates to an ultraviolet irradiator for measuring ultraviolet sensitivity used for the examination of photosensitivity, and more particularly to an ultraviolet irradiator for measuring ultraviolet sensitivity used for determining the minimum amount of erythema and the allowable exposure time to sunlight.

Photosensitivity refers to a group of diseases that cause abnormal skin reactions such as erythema caused by irradiation of light that does not cause any change in healthy people, for example, sunlight. is there. This photosensitivity is caused by various etiologies, and is classified according to the etiology such as hereditary photosensitivity, metabolic photosensitivity, photoallergic photosensitivity, and phototoxic photosensitivity. .
Diseases that develop photosensitivity include, for example, xeroderma pigmentosum, myeloid protoporphyria, varicella-like blistering, polymorphic sun rash, photocontact dermatitis, sun urticaria, photosensitivity drug eruption, porphyria And chronic photodermatitis.
In general, the photosensitivity is determined based on the minimal erythema dose (MED; Minimal Erythema Dose), that is, the minimum amount of ultraviolet rays that causes erythema.

  For such photosensitivity, since no effective treatment has been established at present, the importance of shading in daily life is of course important. (Summer, winter), time zone (morning, noon, night), weather (clear, cloudy, rain), local (north, south) and altitude (lowland, highland) etc. It is very important to know the time by inspection.

The reason why it is extremely important to know the allowable exposure time to sunlight according to the factor of fluctuation in the amount of ultraviolet rays by inspection will be described below.
The intensity of ultraviolet rays contained in sunlight reaching the earth's surface varies depending on the wavelength, and the degree of influence of ultraviolet rays on the human body also varies depending on the wavelength.
As an index of the degree of relative influence on the human body for each wavelength of ultraviolet rays, the amount of erythema ultraviolet rays calculated based on the ultraviolet ray intensity by wavelength and the CIE action spectrum is known. Here, the “CIE action spectrum” is determined by the International Commission on Illumination (CIE), and is an action curve in which ultraviolet rays cause erythema on human skin. Further, the “erythema ultraviolet ray amount” is a value obtained by wavelength-integrating the erythema ultraviolet intensity obtained by multiplying the wavelength-specific ultraviolet intensity by the CIE action spectrum.
The amount of erythema ultraviolet rays varies depending on the season, and in the northern hemisphere, it has a peak in July-August and has a cycle that decreases toward December-January. Is about three times as much as the amount of erythema UV in January. Moreover, the amount of erythema ultraviolet rays varies depending on the region. For example, the amount of erythema ultraviolet rays in Naha is about 1.5 times the value of Sapporo erythema ultraviolet rays in each season.
As an index indicating the level of the amount of ultraviolet rays reaching the ground, a UV index jointly developed by WHO (World Health Organization), WMO (World Meteorological Organization), UNEP (United Nations Environment Program) and the like is known. This “UV index” is determined to indicate the level of the amount of ultraviolet rays reaching the ground by simple numerical values that are easy to use in daily life, and is obtained by dividing the amount of erythema ultraviolet rays by 25 mW / m ^2. Value.
The UV index varies depending on the time of day. For example, at four locations in Sapporo, Tsukuba, Kagoshima and Naha, the daytime (12: 00-14: 00) UV index is 8-8 compared to the morning (8:00) UV index. The value is 10 times. Further, the UV index varies depending on the weather, specifically, mainly the cloud state, and the UV index in the case of clear weather is three times the UV index in the case of rain.
In addition, the amount of ultraviolet rays reaching the ground increases as the altitude increases. Specifically, when the altitude increases by 1000 m, it increases by about 10%. Therefore, both the amount of erythema ultraviolet rays and the UV index differ depending on the altitude. It becomes.
In this way, the amount of erythema ultraviolet rays and the UV index vary greatly depending on the amount of ultraviolet ray variation such as season, time zone, weather, region and altitude, and the amount of ultraviolet rays in the environment where the amount of ultraviolet rays (irradiance) is the largest is The amount of ultraviolet rays in the environment where the amount of ultraviolet rays is the smallest is about 100 times. Thus, taking into account individual differences among patients, it is extremely difficult and dangerous to determine the allowable exposure time for sunlight according to the factor of fluctuation in the amount of ultraviolet rays by means of desktop calculation.

Currently, as an ultraviolet light source for determining the minimum amount of erythema, an ultraviolet irradiator generally used in phototherapy is used. Specifically, an ultraviolet irradiator equipped with a broadband UVB lamp is used for the UVB irradiation test for determining the minimum amount of erythema related to ultraviolet rays in the UVB region (medium wavelength ultraviolet region) having a wavelength of 290 to 320 nm. In addition, an ultraviolet irradiator equipped with a broadband UVA lamp or the like is used in a UVA irradiation test for determining the minimum amount of erythema related to ultraviolet rays in the UVA region (long wavelength ultraviolet rays) having a wavelength of 320 to 400 nm.
However, UV irradiators equipped with these lamps have a spectrum different from the spectrum of sunlight, so when used to determine the minimum amount of erythema, it is possible to miss photosensitivity It cannot be used to determine the allowable exposure time (quantitative value).

On the other hand, as a solar simulator (pseudo-sunlight irradiation device), generally, a discharge lamp, specifically, a xenon lamp that emits continuous light from a short wavelength region to a long wavelength region, and a wavelength selection such as an air mass filter, etc. A filter provided with a filter (a neutral density filter) is known. This solar simulator obtains simulated sunlight that approximates sunlight by cutting light in the infrared wavelength region of radiation emitted from a xenon lamp with a wavelength selection filter.
Since a solar simulator equipped with such a discharge lamp is very expensive and requires complicated maintenance, it is costly to use it as an ultraviolet light source for determining the minimum amount of erythema in a clinic or the like. From the viewpoint of maintainability, there is a concern about the spread. In addition, since it is necessary to provide a wavelength selection filter, when the wavelength selection filter is a reflection type filter, a cooling mechanism for the member irradiated with the reflected light is required, and the wavelength selection filter is an absorption type filter. In some cases, since a cooling mechanism for cooling the absorption filter is required, the apparatus becomes large. As a result, it is not easy to secure the arrangement position of the apparatus in a clinic or the like.
In addition, since the solar simulator provided with the discharge lamp cannot change the amount of ultraviolet rays (irradiance) greatly, it cannot be used for the determination of the allowable exposure time for sunlight according to the ultraviolet ray amount variation factor.
Specifically, in the solar simulator, the output range of the discharge lamp is generally 50 to 80%, and in order to obtain high irradiance, the reflected light of the wavelength selection filter (reflection system filter) A large cooling mechanism for cooling the member to be irradiated or the wavelength selective filter (absorption filter) is required. For this reason, a solar simulator equipped with a discharge lamp can be used to determine the maximum amount of UV light (irradiance) that can be used to determine the allowable exposure time for sunlight according to the UV light fluctuation factor. It is practically impossible to have variable performance that is about 100 times the minimum value of (irradiance).

  Moreover, as a solar simulator, what is provided with the LED lamp instead of the discharge lamp is proposed (for example, refer patent document 1 and patent document 2). However, these solar simulators are large-sized ones that emit light in a wide wavelength range from the ultraviolet region to the infrared region, and therefore cannot be suitably used for the examination of photosensitivity.

Japanese Patent No. 5256521 JP 2012-221838 A

  Thus, the present invention has been found by the present inventors as a result of intensive research on ultraviolet light sources for ultraviolet sensitivity measurement based on the above circumstances, and its purpose is as follows. It is an object of the present invention to provide a small ultraviolet irradiator for measuring ultraviolet sensitivity capable of performing ultraviolet sensitivity measurement with high reliability.

The ultraviolet irradiator for measuring ultraviolet sensitivity according to the present invention includes a plurality of types of LED elements having different emission center wavelengths, and includes continuous spectrum light having a wavelength of 290 to 320 nm and continuous spectrum light having a wavelength of 320 to 400 nm. A light source unit that emits at least one continuous spectrum light, and a drive unit having a control mechanism that independently controls the drive of each of the plurality of types of LED elements constituting the light source unit,
The emitted light from the light source unit is irradiated on an irradiation site in human skin.

  In the ultraviolet irradiator for measuring ultraviolet sensitivity according to the present invention, it is preferable that continuous light having a wavelength of 290 to 400 nm is emitted from the light source unit.

In the ultraviolet irradiator for measuring ultraviolet sensitivity according to the present invention, the plurality of types of LED elements constituting the light source unit have at least one type of LED element having a light emission center wavelength in a wavelength range of 290 to 320 nm, The other one type of LED element has an emission center wavelength in the wavelength range of 320 to 400 nm,
In the plurality of types of LED elements constituting the light source unit, it is preferable that the emission center wavelength interval of two types of LED elements having emission center wavelengths close to each other is 10 to 20 nm.

  In the ultraviolet irradiator for measuring the ultraviolet sensitivity according to the present invention, the spectral coincidence, which is the ratio of the relative energy distribution of the emitted light from the light source unit to the relative energy distribution of the reference sunlight, is 75 to 125%. Is preferred.

  In the ultraviolet irradiator for measuring ultraviolet sensitivity according to the present invention, the plurality of types of LED elements constituting the light source unit are an LED element having an emission center wavelength at a wavelength of 310 nm, an LED element having an emission center wavelength at a wavelength of 325 nm, and a wavelength. An LED element having an emission center wavelength at 340 nm, an LED element having an emission center wavelength at 355 nm, an LED element having an emission center wavelength at 365 nm, an LED element having an emission center wavelength at 375 nm, and an emission center wavelength at 385 nm It is preferable that there are at least eight kinds of LED elements, that is, an LED element having an emission center wavelength at a wavelength of 395 nm.

  In the ultraviolet irradiator for measuring ultraviolet sensitivity according to the present invention, the control mechanism independently controls the output of each of the plurality of types of LED elements constituting the light source unit to thereby control the output light from the light source unit. It is preferable to have an output control function for adjusting the light intensity.

  In the ultraviolet irradiator for measuring ultraviolet sensitivity according to the present invention, the light source unit is movably mechanically and electrically connected to the drive unit by a flexible cable in which a power supply line is covered with an insulating material. It is preferable.

In the ultraviolet irradiator for measuring ultraviolet sensitivity according to the present invention, the light emitting aperture is made of an ultraviolet blocking material and is disposed in front of the light emitting direction of the light source unit so as to surround the optical path of the emitted light from the light source unit. It is preferable that a frame-like member is provided.
In the ultraviolet irradiator for measuring ultraviolet sensitivity according to the present invention having such a configuration, it is preferable that a visible light transmissive region is formed on the frame member for the light exit opening.

In the ultraviolet irradiator for measuring ultraviolet sensitivity according to the present invention, the light source unit includes a plurality of types of LED elements having different emission center wavelengths, thereby allowing continuous spectrum light in the wavelength range of 290 to 320 nm and wavelength of 320 to 400 nm. At least one continuous spectrum light of the range of continuous spectrum light is emitted. Moreover, the drive part has a control mechanism which controls each drive of the multiple types of LED element which comprises a light source part independently. Therefore, the relative energy distribution and light intensity (irradiance) of the light emitted from the light source unit can be easily adjusted.
Therefore, according to the ultraviolet irradiator for measuring the ultraviolet sensitivity of the present invention, the ultraviolet ray having the relative energy distribution and the light intensity required for the ultraviolet sensitivity measurement can be emitted from the light source unit without using the wavelength selection filter. Therefore, the ultraviolet sensitivity measurement can be performed with high reliability, and the irradiator itself can be made small.

It is explanatory drawing which shows an example of a structure of the ultraviolet irradiator for ultraviolet sensitivity measurement of this invention. It is explanatory drawing which shows the structure of the light source unit in the light source part of the ultraviolet irradiator for ultraviolet sensitivity measurement of FIG. The spectral irradiance (relative energy distribution) of continuous spectrum light emitted in the UVB range mode from the light source unit of the ultraviolet irradiator for ultraviolet sensitivity measurement in FIG. It is a spectrum figure shown with the irradiance spectrum of the emitted light of the LED element made into the lighting state. The spectral irradiance (relative energy distribution) of continuous spectrum light emitted in the UVA range mode from the light source part of the ultraviolet irradiator for ultraviolet sensitivity measurement in FIG. It is a spectrum figure shown with the irradiance spectrum of the emitted light of the LED element made into the lighting state. The spectral irradiance (relative energy distribution) of the continuous spectrum light emitted in the UVB + UVA range mode from the light source unit of the ultraviolet irradiator for ultraviolet sensitivity measurement in FIG. It is a spectrum figure shown with the irradiance spectrum of the emitted light of the LED element made into the lighting state. In the ultraviolet irradiator for measuring ultraviolet sensitivity in FIG. 1, the radiation according to the light emitted from the light source unit obtained by selectively lighting one of the eight types of LED elements constituting the light source unit according to the wavelength mode. It is a spectrum figure which shows an illumination intensity spectrum. It is explanatory drawing which shows the principal part of the light source part in the other example of the structure of the ultraviolet irradiator for ultraviolet sensitivity measurement of this invention with an irradiation surface.

Embodiments of the present invention will be described below.
FIG. 1 is an explanatory view showing an example of the configuration of an ultraviolet irradiator for measuring ultraviolet sensitivity according to the present invention, and FIG. 2 shows the configuration of a light source unit in the light source section of the ultraviolet irradiator for measuring ultraviolet sensitivity of FIG. It is explanatory drawing shown.
This ultraviolet irradiator 10 for measuring ultraviolet sensitivity is used for the examination of photosensitivity, specifically, ultraviolet sensitivity measurement for determining the minimum erythema amount (MED), the allowable exposure time to sunlight, and the sensitive wavelength. Is for doing. In this ultraviolet sensitivity measurement, ultraviolet rays having a predetermined wavelength or a predetermined wavelength range are applied to an irradiation surface F, specifically, an arbitrary irradiation site on a human skin, with a predetermined irradiation amount (integrated irradiation amount). This is performed by visually confirming the presence or absence of the occurrence of erythema after elapse of a certain time from the irradiation at the irradiated site.

The ultraviolet irradiator 10 for measuring UV sensitivity includes a light source unit 20 in which a light source unit 25 including a plurality of types of LED elements 27 is supported by a cylindrical support member 21, and a plurality of types of LED elements constituting the light source unit 20. A control mechanism for independently controlling the drive of each of the 27 includes a drive unit 30 housed in a rectangular parallelepiped casing 31. The support member 21 includes a cylindrical small-diameter portion 22 and a large-diameter portion 23 that is continuous with the small-diameter portion 22 and has a curved surface that is curved outward in the radial direction as the distance from the small-diameter portion 22 increases. It is what you have. In the support member 21, a light source unit 25 is disposed at an end portion on the large diameter portion side so as to close the square-shaped large diameter portion side opening. On the other hand, at the end portion on the small diameter portion side, The circular small-diameter portion side opening is closed by a lid member 24 in which a cable through hole (not shown) is formed in the center portion.
The light source unit 20 is movably mechanically and electrically connected to the drive unit 30 by the flexible cable 16 that is led out from the cable through-hole in the lid member 24 and in which the electric wire is covered with an insulating material. Has been.
Since the light source unit 20 is movably connected by the flexible cable 16, the plurality of types of LED elements 27 constituting the light source unit 20 can be changed by moving the light source unit 20 or changing the arrangement state. It can be in a state of facing the irradiation site. Therefore, the emitted light from the light source part 20 can be irradiated with respect to the intended irradiation site | part on a human skin (irradiation surface F).
In the example of this figure, the small diameter portion 22 of the support member 21 functions as a hand grip. The ultraviolet irradiator 10 for measuring ultraviolet sensitivity is a handy type that can be placed at an intended position by moving the light source 20 by holding the small diameter portion 22 with one hand when measuring the ultraviolet sensitivity. .

  The light source unit 20 includes a plurality of types (eight types in the example of this figure) of LED elements 27 having different emission center wavelengths. The light source unit 20 emits light from the one type of LED element 27 when the one of the plurality of types of LED elements 27 is turned on, and two or more types of LED elements. When the elements 27 are selectively turned on simultaneously, the light from the two or more types of LED elements 27 is emitted from the light source unit 20 as continuous spectrum light.

The plurality of types of LED elements 27 constituting the light source unit 20 have at least one type of LED element 27 having a light emission center wavelength in a wavelength range of 290 to 320 nm (hereinafter also referred to as “UVB range”). It is preferable that the one kind of LED element 27 has an emission center wavelength in a wavelength range of 320 to 400 nm (hereinafter also referred to as “UVA range”). Here, in this specification, when the LED element 27 having the emission center wavelength at the wavelength of 320 nm is included in the plural types of LED elements 27 constituting the light source unit 20, the LED element having the emission center wavelength at the wavelength of 320 nm is The LED element has an emission center wavelength in the UVB range. That is, the wavelength of 320 nm is included in the UVB range. In addition, in the plurality of types of LED elements 27 constituting the light source unit 20, it is preferable that the interval between the emission center wavelengths of the two types of LED elements 27 whose emission center wavelengths are close to each other is 10 to 20 nm.
A plurality of types of LED elements 27 constituting the light source unit 20 include an LED element 27 having an emission center wavelength in the UVB range and an LED element 27 having an emission center wavelength in the UVA range, and the emission center wavelengths are close to each other. When the emission center wavelength interval of the LED element 27 of the type is 10 to 20 nm, the usability of the ultraviolet irradiator 10 for measuring the ultraviolet sensitivity is increased, and more reliable ultraviolet sensitivity measurement can be performed. .
Specifically, the light source unit 20 includes three types of continuous spectrum light in the UVB range, continuous spectrum light in the UVA range, and continuous spectrum light in the wavelength range of 290 to 400 nm (hereinafter also referred to as “UVB + UVA range”). And a plurality of types of ultraviolet rays having different wavelengths in the UVB + UVA range (specifically, ultraviolet rays related to each of the plurality of types of LED elements 27 constituting the light source unit 20) can be emitted. . Therefore, the ultraviolet irradiator 10 for measuring the ultraviolet sensitivity measures the ultraviolet sensitivity measurement for determining the minimum amount of erythema using the ultraviolet ray in the UVB range or the ultraviolet ray in the UVA range, and the allowable exposure time for sunlight using the ultraviolet ray in the UVB + UVA range. It can be suitably used for ultraviolet sensitivity measurement for determination and ultraviolet sensitivity measurement for determining sensitivity wavelengths using a plurality of types of ultraviolet rays having different wavelengths in the UVB + UVA range.
In addition, the relative energy distribution obtained by approximating the three types of continuous spectrum light emitted from the light source unit 20 to the relative energy distribution of the corresponding wavelength range (specifically, the UVB range, the UVA range, or the UVB + UVA range) in the reference sunlight. It can have. Therefore, the ultraviolet sensitivity measurement for determining the minimum erythema amount and the ultraviolet sensitivity measurement for determining the sunlight exposure allowable time can be performed with high accuracy.
In the UVB + UVA range, a plurality of types of ultraviolet rays having different wavelengths can be emitted at substantially equal wavelength intervals and short wavelength intervals. Therefore, it is possible to accurately determine the sensitivity wavelength in the UVB + UVA range based on the ultraviolet sensitivity measurement results relating to a plurality of types of ultraviolet rays.

Preferred examples of the plurality of types of LED elements 27 constituting the light source unit 20 include an LED element having an emission center wavelength at a wavelength of 310 nm, an LED element having an emission center wavelength at a wavelength of 325 nm, and an LED having an emission center wavelength at a wavelength of 340 nm. Element, LED element having emission center wavelength at wavelength 355 nm, LED element having emission center wavelength at wavelength 365 nm, LED element having emission center wavelength at wavelength 375 nm, LED element having emission center wavelength at wavelength 385 nm, and light emission at wavelength 395 nm Examples include at least eight types of LED elements having a central wavelength.
By using the above eight types of LED elements as the plurality of types of LED elements 27 constituting the light source unit 20, continuous spectrum light that is very close to sunlight as the light emitted from the light source unit 20, specifically, a reference It is possible to obtain continuous spectrum light having a spectrum matching degree of 75 to 125%, which is a ratio of the relative energy distribution of the emitted light from the light source unit 20 to the relative energy distribution of the corresponding wavelength range in sunlight. Therefore, the ultraviolet sensitivity measurement for determining the minimum amount of erythema and the ultraviolet sensitivity measurement for determining the sunlight exposure allowable time can be performed with higher accuracy.
Further, in the UVB + UVA range, a plurality of types of ultraviolet rays having different wavelengths (specifically, ultraviolet rays related to each of the eight types of LED elements constituting the light source unit 20) are transmitted at short wavelength intervals, specifically 10-15 nm. The light can be emitted at substantially equal wavelength intervals. Therefore, it is possible to more accurately determine the sensitivity wavelength in the UVB + UVA range based on the ultraviolet sensitivity measurement results relating to a plurality of types of ultraviolet rays.
In the example of this figure, as the eight kinds of LED elements 27 constituting the light source unit 20, an LED element having an emission center wavelength at a wavelength of 310 nm, an LED element having an emission center wavelength at a wavelength of 325 nm, and an emission center wavelength at a wavelength of 340 nm. LED element having an emission center wavelength at a wavelength of 355 nm, LED element having an emission center wavelength at a wavelength of 365 nm, an LED element having an emission center wavelength at a wavelength of 375 nm, an LED element having an emission center wavelength at a wavelength of 385 nm, and a wavelength of 395 nm LED elements having an emission center wavelength (hereinafter collectively referred to as “specific eight types of LED elements”) are used.

Moreover, it is preferable that the light source part 20 is provided with two or more LED elements of the same kind from a viewpoint of spectral irradiance variability.
In the example of this figure, the light source unit 20 has two LED elements 27 each having eight types. That is, the number of LED elements 27 constituting the light source unit 20 is 16.

Specifically, the light source unit 20 includes a light source unit 25 in which a plurality of types of LED elements 27 are arranged on a square flat plate substrate 26 so as to be arranged vertically and horizontally along the outer peripheral edge of the substrate 26. . In the light source unit 25, the substrate 26 has vertical and horizontal dimensions equivalent to the outer diameter of the end portion on the large diameter side of the support member 21.
The light source unit 25 is supported and fixed by a fixing member (not shown) at the end of the support member 21 on the large-diameter portion side, so that the plurality of types of LED elements 27 constituting the light source unit 25 are supported by the support member. 21 is arranged in a state perpendicular to the cylinder axis of the support member 21 so as to face outward in the cylinder axis direction (downward in FIG. 1). A flexible cable 16 is electrically connected to the light source unit 25. A condensing optical system for condensing light from the light source unit 25 is provided in front of the light source unit 25 (downward in FIG. 1). This condensing optical system includes a collimating convex lens 28A that quasi-parallelizes incident light and a condensing convex lens 28B that condenses incident light, and the collimating convex lens 28A is closer to the light source unit 25. It was installed side by side. That is, the collimating convex lens 28A is disposed between the light source unit 25 and the condensing convex lens 28B. The collimating convex lens 28A and the condensing convex lens 28B are each supported by a fixing member (not shown) and fixed to the substrate 26.
In this way, the light source unit 20 is configured to condense and emit the light from the light source unit 25 by the condensing optical system (the collimating convex lens 28A and the condensing convex lens 28B).
In FIG. 1, the light path from the light source unit 25 to the irradiation surface F (human skin) is indicated by a one-dot chain line.

In the light source unit 25, as shown in FIG. 2, a plurality of types of LED elements 27 are arranged vertically and horizontally on a substrate 26 at a predetermined interval, specifically, a predetermined pitch (center-to-center distance). It is preferable that they are arranged in a grid.
Further, in the case where a plurality of the same type of LED elements 27 are provided as in the example of this figure, the same type of LED elements 27 are connected to each other for convenience of manufacturing, specifically for convenience of wiring design. It is preferable to arrange them adjacent to each other.
In the example of this figure, eight types of 16 LED elements 27 constituting the light source unit 20 are arranged along the outer peripheral edge of the substrate 26 at a regular interval in a lattice shape (4 vertical rows and 4 horizontal rows). The plurality of (two) LED elements 27 of the same type are arranged in parallel in the horizontal direction (left-right direction in FIG. 2).

Examples of the plurality of types of LED elements 27 constituting the light source unit 20 include LED elements made of InGaN-based semiconductors, LED elements made of AlGaN-based semiconductors, and the like according to the wavelength range of emitted light required for each LED element 27. Used as appropriate.
In the example of this figure, as an LED element having an emission center wavelength at a wavelength of 310 nm, an LED element having an emission center wavelength at a wavelength of 325 nm, an LED element having an emission center wavelength at a wavelength of 340 nm, and an LED element having an emission center wavelength at a wavelength of 355 nm Each uses a surface-mount type LED element made of a square AlGaN-based semiconductor having an output of 20 mW and a vertical and horizontal dimension of 3.5 mm. Further, as an LED element having an emission center wavelength at a wavelength of 365 nm, an LED element having an emission center wavelength at a wavelength of 375 nm, an LED element having an emission center wavelength at a wavelength of 385 nm, and an LED element having an emission center wavelength at a wavelength of 395 nm, A surface-mount LED element made of a square InGaN-based semiconductor having an output of 20 mW and a vertical and horizontal dimension of 3.5 mm is used.

The collimating convex lens 28A and the condensing convex lens 28B constituting the condensing optical system each have a size larger than the LED element arrangement area on the substrate 26, and face the entire LED element arrangement area. Are arranged to be.
In the example of this figure, in the convex convex lens 28A, a square-shaped convex portion having a vertical and horizontal dimension equivalent to the vertical and horizontal dimensions of each LED element 27 is formed in a square area corresponding to each LED element 27 in the light source unit 25. It has been done.

The drive unit 30 has a control mechanism that independently controls the drive of each of the plurality of types of LED elements 27 constituting the light source unit 20. This control mechanism preferably has a type-specific ON-OFF control function for independently ON-OFF controlling each of the plurality of types of LED elements 27 constituting the light source unit 20.
Since the control mechanism has a type-specific ON-OFF control function, the light source unit 20 can emit desired ultraviolet rays according to the ultraviolet sensitivity measurement to be performed.
In the example of this figure, the control mechanism of the drive unit 30 has a type-specific ON-OFF control function that performs ON-OFF control independently on each of the eight specific types of LED elements that constitute the light source unit 20, and implements it. Depending on the UV sensitivity measurement, all of the eight specific LED elements can be turned on, and one or more of the eight specific LED elements can be selectively lit.
Here, when all of the eight specific LED elements are turned on by the control mechanism (hereinafter also referred to as “UVB + UVA range mode”), the continuous spectrum light in the UVB + UVA range is emitted as the emitted light from the light source unit 20. can get. Further, among the eight specific types of LED elements, two types of LED elements, an LED element having an emission center wavelength at a wavelength of 310 nm and an LED element having an emission center wavelength at a wavelength of 325 nm, are lit simultaneously (hereinafter referred to as “UVB range mode”). ”), Continuous spectrum light in the UVB range can be obtained as light emitted from the light source unit 20. Also, among the eight types of specific LED elements, an LED element having an emission center wavelength at a wavelength of 325 nm, an LED element having an emission center wavelength at a wavelength of 340 nm, an LED element having an emission center wavelength at a wavelength of 355 nm, and an emission center wavelength at a wavelength of 365 nm 7 types of LED elements are simultaneously turned on: an LED element having an emission center wavelength at a wavelength of 375 nm, an LED element having an emission center wavelength at a wavelength of 385 nm, and an LED element having an emission center wavelength at a wavelength of 395 nm , Also referred to as “UVA range mode”), continuous spectrum light in the UVA range is obtained as light emitted from the light source unit 20. Further, when one kind of LED elements among the eight kinds of specific LED elements is turned on (hereinafter also referred to as “mode by wavelength”), the emitted light from the light source unit 20 is used as the one kind of LED element. UV light having a spectrum related to the emitted light is obtained.

Further, the control mechanism controls the output of each of the plurality of types of LED elements 27 constituting the light source unit 20 to independently adjust the light intensity (irradiance) of the emitted light from the light source unit 20, thereby controlling the output by type. It is preferable that it has a function.
Since the control mechanism has a type-specific output control function, the light source unit 20 can emit ultraviolet rays having a predetermined light intensity according to the ultraviolet sensitivity measurement to be performed.
In the example of this figure, the control mechanism of the drive unit 30 controls the output of each of the eight specific types of LED elements constituting the light source unit 20 independently, and adjusts the light intensity of the emitted light from the light source unit 20 by type. It has an output control function, and the light intensity of the emitted light from the light source unit 20 can be varied by a large variable width in accordance with the ultraviolet sensitivity measurement to be performed. Specifically, in the emitted light from the light source unit 20, the light intensity of the emitted light can be varied so that the maximum value is about 100 times the minimum value.

The drive unit 30 includes a plurality of (a) power supply unit 33 that is electrically connected to the external power source 19 and a plurality of types of LED elements 27 that constitute the light source unit 20 ( In the example of this figure, eight LED element drive units 34 and a control unit 35 are provided. The control unit 35 includes a type-specific ON-OFF control unit and a type-specific output control unit, and is electrically connected to each of the power supply unit 33 and the plurality of LED element drive units 34. In the drive unit 30, the control mechanism includes a plurality of LED element drive units 34 and a control unit 35.
In addition, inside the housing 31, there is an information recording unit 36 in which LED element control information corresponding to the ultraviolet sensitivity measurement conditions is recorded, and a graphic operation panel for the irradiator operator to input the ultraviolet sensitivity measurement conditions. And a display unit 38 provided with a display panel for displaying the ultraviolet sensitivity measurement conditions input by the graphic operation panel. Here, as the “LED element control information according to the ultraviolet sensitivity measurement conditions”, for example, the driving LED element selection information (mode selection information) according to the type of ultraviolet sensitivity measurement to be performed, and the allowable exposure time to sunlight The season (summer, winter), time zone (morning, noon, night), weather (clear, cloudy, rain), region (north, south) and For example, information on the amount of ultraviolet rays according to factors that vary the amount of ultraviolet rays such as altitude (lowland, highland). The information recording unit 36 is electrically connected to the control unit 35, and the input unit 37 and the display unit 38 are electrically connected to the power supply unit 33 and the control unit 35, respectively. A graphic operation panel and a display panel are disposed on the side surface of the housing 31.
In the example of this figure, a commercial power source is used as the external power source 19.

Further, in the ultraviolet sensitivity measuring ultraviolet irradiator 10, as shown in FIG. 1, the light path of the light emitted from the light source unit 20 is made of an ultraviolet blocking material in front of the light emitting direction of the light source unit 20. It is preferable that a light emitting aperture frame member 41 arranged so as to surround is provided. The light emitting aperture frame member 41 is formed in a substantially square cylindrical shape having an inner diameter of the vertical and horizontal dimensions equivalent to the vertical and horizontal dimensions of the substrate 26 on the light incident side (upper side in FIG. 1).
By providing the light emitting aperture frame member 41, the separation distance between the irradiation site and the light source unit 20 (the condensing optical system), that is, the irradiation distance is always constant without being changed for each measurement. be able to. As a result, highly reliable UV sensitivity measurement can be performed stably.
In addition, since the light emitting aperture frame member 41 is made of an ultraviolet blocking material, the light emitted from the light source unit 20 does not pass through the light exit port 42 of the light emitting aperture frame member 41 and is external to the irradiator. And the light emitting aperture frame member 41 can have an irradiation region control function.
In the example of this figure, the light emitting aperture frame member 41 includes a cylindrical portion 41A extending along the cylindrical axis of the support member 21, and the light emitting side (lower side in FIG. 1) end of the cylindrical portion 41A. The flange 41B protrudes inwardly from the portion and extends perpendicularly to the tubular portion 41A, and the opening edge of the light exit port 42 is configured by the tip edge of the flange 41B. Thus, the light emitting aperture frame member 41 has the flange portion 41B, thereby having an irradiation region control function. And the irradiation area | region in the irradiation surface F (human skin) is made into the square whose vertical and horizontal dimension is 10 mm.

Further, it is preferable that a visible light transmissive region is formed in the light emitting aperture frame member 41.
Since the visible light transmissive region is formed in the light output aperture frame member 41, the inside of the light output aperture frame member 41 can be visually recognized through the visible light transparent region. The irradiation site can be confirmed by visual observation, so that the emitted light from the light source unit 20 can be reliably irradiated onto the intended irradiation site on the human skin (irradiation surface F).
In the example of the example in this figure, the frame member 41 for light emission opening has visible light permeability. That is, the entire light emitting aperture frame member 41 is a visible light transmitting region.

Moreover, since the light emission opening frame member 41 is in direct contact with the human skin, it is preferable that the light emission opening frame member 41 is provided interchangeably from the viewpoint of hygiene.
In the example of this figure, the light emission opening frame member 41 is provided to be detachable from the support member 21 via a fitting mechanism having a fitting claw portion (not shown).

  Examples of the ultraviolet blocking material constituting the light emitting aperture frame member 41 include polyethylene terephthalate (PET) resin to which an ultraviolet absorber is added.

In addition, the ultraviolet irradiator 10 for measuring ultraviolet sensitivity is provided with a detachable long pass filter (hereinafter also referred to as “specific long pass filter”) that cuts light having a wavelength of 320 nm or less in front of the light source unit 25. Preferably it is.
Since the specific long pass filter is detachably provided, when the irradiation part is irradiated with the emitted light from the light source unit 20 in the UVA range mode, the ultraviolet ray having a wavelength range other than the UVA range is applied to the irradiation part. Specifically, it is possible to prevent irradiation with ultraviolet rays in the UVB range. As a result, the ultraviolet sensitivity measurement for determining the minimum amount of erythema related to ultraviolet rays in the UVA range can be performed with higher accuracy. In addition, when irradiating the irradiation part with the emitted light from the light source unit 20 in the UVB range mode, even if the irradiation part is irradiated with ultraviolet rays in the UVA range, the minimum erythema amount related to the UVB range is obtained. Ultraviolet sensitivity measurement for determination can be performed with high accuracy. That is, when irradiating the irradiated portion with the emitted light from the light source unit 20 in the UVB range mode, the irradiation portion is irradiated with ultraviolet rays having a wavelength range other than the UVB range, specifically, ultraviolet rays within the UVA range. May be irradiated.
As the specific long pass filter, for example, a filter glass (absorption type) “UV N-WG320” manufactured by Schott is used.
In the example of this figure, the specific long pass filter is detachably provided between the parallelizing convex lens 28A and the condensing convex lens 28B.

  Such an ultraviolet irradiator 10 for measuring ultraviolet sensitivity includes a light source unit 20, a light source unit 25 (a plurality of types of LED elements 27) and a condensing optical system (specifically, a collimating convex lens 28 </ b> A and a condensing lens). It arrange | positions away from the said irradiation site | part so that it may oppose an irradiation site | part via the convex lens 28B). In the light source unit 20, the LED element 27 to which power is supplied from the drive unit 30 is turned on, and the emitted light from the light source unit 20 is irradiated (surface irradiation) to the irradiation site.

Thus, in the ultraviolet irradiator 10 for measuring the ultraviolet sensitivity, the light source unit 20 includes eight types of LED elements 27 having different emission center wavelengths, specifically, eight specific types of LED elements. The type of continuous spectrum light (specifically, continuous spectrum light in the UVB range, continuous spectrum light in the UVA range, and continuous spectrum light in the UVB + UVA range) is emitted. Further, the drive unit 30 has a control mechanism for independently controlling each of the eight types of LED elements 27 constituting the light source unit 20, and the control mechanism includes a type-specific ON-OFF control function and a type-specific output. It is supposed to have a control function. Therefore, the drive unit 30 can easily adjust the relative energy distribution and output (light intensity) of the emitted light from the light source unit 20, and thus in the UVB range mode, UVA range mode, UVB + UVA range mode, and wavelength-specific mode. In each case, the desired ultraviolet light can be obtained. Specifically, in the UVB range mode, ultraviolet light having a relative energy distribution (spectral irradiance) as shown in FIG. 3 is obtained as continuous spectrum light in the UVB range. In the UVA range mode, a continuous spectrum in the UVA range is obtained. As the light, an ultraviolet ray having a relative energy distribution (spectral irradiance) as shown in FIG. 4 is obtained, and in the UVB + UVA range mode, as a continuous spectrum light in the UVB + UVA range, a relative energy distribution ( UV light having a spectral irradiance) is obtained. The continuous spectrum light in the UVB + UVA range is a ratio of the relative energy distribution of the continuous spectrum light to the relative energy distribution (spectral irradiance (JIS C 8904-3: 2011)) in the corresponding wavelength range (UVB + UVA range) in the reference sunlight. The spectral coincidence is 102%. Moreover, in the mode according to wavelength, by selectively lighting one type of the eight types of LED elements 27 constituting the light source unit 20, from the light source unit 20 according to the curves (a) to (h) in FIG. Ultraviolet rays having an irradiance spectrum as shown can be emitted.
3 to 5, the spectral irradiance (relative energy distribution) of the reference sunlight is indicated by a broken line, and the spectral irradiance (relative energy distribution) of the continuous spectrum light is indicated by a solid line. 3 to 6, curve (a) shows the irradiance spectrum of the emitted light of the LED element having the emission center wavelength at a wavelength of 310 nm, and curve (b) shows the LED having the emission center wavelength at a wavelength of 325 nm. The irradiance spectrum of the emitted light of the element is shown, curve (c) shows the irradiance spectrum of the emitted light of the LED element having the emission center wavelength at a wavelength of 340 nm, and curve (d) shows the emission center wavelength at the wavelength of 355 nm. The irradiance spectrum of the emitted light of the LED element having the curve (e) shows the irradiance spectrum of the emitted light of the LED element having the emission center wavelength at a wavelength of 365 nm, and the curve (f) is the emission center at the wavelength of 375 nm. The irradiance spectrum of the emitted light of the LED element having the wavelength is shown, and the curve (g) shows the emission of the LED element having the emission center wavelength at the wavelength of 385 nm. Shows the irradiance spectrum of the light, the curve (h) show irradiance spectrum of light emitted from the LED element having an emission center wavelength of the wavelength 395 nm.
Therefore, according to the ultraviolet irradiator 10 for measuring the ultraviolet sensitivity, the light source unit 20 does not necessarily use the wavelength selection filter for the light of the relative energy distribution and the light intensity (irradiance) required for the ultraviolet sensitivity measurement. Therefore, the ultraviolet sensitivity measurement can be performed with high reliability, and the irradiator itself can be made small.

  Further, in the ultraviolet irradiator 10 for measuring the ultraviolet sensitivity, the light source unit 20 is movably mechanically and electrically connected to the drive unit 30 by the flexible cable 16, so Irradiation can be applied to an intended irradiation site on the human skin (irradiation surface F).

In addition, in the ultraviolet irradiator 10 for measuring the ultraviolet sensitivity, the light emitting aperture frame member 41 is provided, so that the separation distance (irradiation distance) between the irradiation site and the light source unit 20 (condensing optical system). Can always be kept constant without being varied from measurement to measurement. Further, it is possible to prevent the light emitted from the light source unit 20 from being emitted to the outside of the irradiator without passing through the light exit port 42 of the light exit aperture frame-like member 41, and the irradiation area always has the intended shape and size. can do. Therefore, highly reliable UV sensitivity measurement can be performed stably and safely.
In addition, since the light emitting aperture frame member 41 has visible light transparency, the inside of the light emitting aperture frame member 41 can be visually recognized. It is possible to reliably irradiate the intended irradiation site on the skin.

  According to the ultraviolet irradiator 10 for measuring ultraviolet sensitivity, it is possible to perform ultraviolet sensitivity measurement for determining the following items (1) to (4) related to photosensitivity.

(1) Minimum amount of erythema related to ultraviolet rays in the UVB range (2) Minimum amount of erythema related to ultraviolet rays in the UVA range (3) Season (summer, winter), time zone (morning, noon, night), weather (clear, cloudy, Rain exposure, time allowed for exposure to sunlight (quantitative value) according to factors that change the amount of ultraviolet rays such as regions (north, south) and altitudes (low and high)
(4) Sensitive wavelength in the UVB + UVA range

  Hereinafter, a specific method for determining the inspection items (1) to (4) using the ultraviolet irradiator 10 for measuring ultraviolet sensitivity will be described.

Determination of the minimum erythema amount relating to ultraviolet rays in the UVB range is performed in the UVB range mode.
First, the UV sensitivity measuring ultraviolet irradiator 10 for irradiating the site of any 10 points without rash on the skin of a person, the amount of irradiation (accumulated irradiation ^{amount), 10mJ / cm 2, 20mJ /} cm 2 by ^{30mJ / cm 2, 40mJ / cm} 2, 50mJ / cm 2, 60mJ / cm 2, 80mJ / cm 2, 100mJ / cm 2, 120mJ / cm 2 and 160 mJ / cm ² and comprising condition, from the light source unit 20 Irradiate the emitted light. Next, after the elapse of 24 hours from the irradiation, the presence or absence of the occurrence of erythema at 10 irradiation sites is visually confirmed. And let the smallest irradiation amount which the erythema generate | occur | produced be the minimum erythema amount.
Based on the minimum amount of erythema obtained in this way, when the minimum amount of erythema is 50 mJ / cm ² or less, that is, when the occurrence of erythema is confirmed at an irradiation site where the irradiation amount is 50 mJ / cm ² or less. Judged to be hypersensitive to ultraviolet rays in the UVB range.

The determination of the minimum erythema amount relating to ultraviolet rays in the UVA range is performed in the UVA range mode.
First, with the ultraviolet irradiator 10 for measuring ultraviolet sensitivity, the irradiation dose (accumulated irradiation dose) is 3 J / cm ² and 6 J / cm ² for any three irradiation sites without rash on the human skin. Then, the light emitted from the light source unit 20 is irradiated under the condition of 9 J / cm ² . Next, after 24 hours, 48 hours, and 72 hours after irradiation, the presence or absence of erythema at the three irradiated sites is visually confirmed. And let the smallest irradiation amount which the erythema generate | occur | produced be the minimum erythema amount.
When the minimum erythema amount is 3 J / cm ² or less based on the minimum erythema amount thus obtained, that is, when the occurrence of erythema is confirmed in any of the three irradiated sites, the UVA range Judged to be hypersensitive to UV rays.

Sun exposure depending on factors such as season (summer, winter), time zone (morning, daytime, night), weather (clear, cloudy, rainy), region (north, south) and altitude (lowland, highland) The allowable time is determined by the UVB + UVA range mode.
First, with the ultraviolet irradiator 10 for measuring ultraviolet sensitivity, the irradiation amount (integrated irradiation amount) corresponding to the ultraviolet ray amount variation factor is applied to an arbitrary plurality of irradiation sites without rash on the human skin. The light emitted from the light source unit 20 is irradiated. Specifically, for example, the ultraviolet light irradiator 10 for measuring the ultraviolet sensitivity is used to radiate the light emitted from the light source unit 20 to three irradiation sites, which are sunny, cloudy, and rainy in the summer daytime in Tokyo. Irradiation is performed under the condition of an irradiation amount (integrated irradiation amount) for one hour under two weather conditions. Subsequently, after the elapse of a certain time from the irradiation, the presence or absence of the occurrence of erythema at the three irradiated sites is visually confirmed. And in the condition which concerns on the irradiation site | part which generation | occurrence | production of erythema was not confirmed, it determines with sunlight exposure tolerance time being 1 hour.
In addition, by applying the sunscreen agent to the irradiated part and determining the allowable sun exposure time by the above method, it is possible to grasp the allowable sun exposure time when the sunscreen agent is applied. .

The sensitive wavelength in the UVB + UVA range is determined by the wavelength mode.
First, the ultraviolet light irradiator 10 for measuring the ultraviolet sensitivity is used to irradiate the light from the light source unit under a condition that a predetermined irradiation dose (integrated irradiation dose) is applied to any eight irradiation sites without rash on the human skin. Emission light (eight kinds of ultraviolet rays) is irradiated. Next, after a certain period of time has passed since irradiation, the presence or absence of erythema at the eight irradiated sites is visually confirmed. And it determines with having sensitivity with respect to the ultraviolet-ray of the wavelength which concerns on the irradiation site | part by which generation | occurrence | production of the erythema was confirmed.

The present invention is not limited to the above embodiment, and various modifications can be made.
For example, the light source unit includes three types of continuous spectrum light (specifically, UVB range continuous spectrum light, UVA range continuous spectrum light, and UVB + UVA range from the viewpoint of the availability of an ultraviolet irradiator for measuring UV sensitivity. The continuous spectrum light of the UVB range and the UVB + UVA range are preferably capable of emitting a plurality of types of ultraviolet rays having different wavelengths, but at least one of the continuous spectrum light of the UVB range and the continuous spectrum light of the UVA range. As long as it emits light.
In addition, the ultraviolet irradiator for measuring the ultraviolet sensitivity of the present invention only needs to have a light source unit and a drive unit. The configuration of the light source unit and the configuration of the drive unit are shown in FIGS. 1 and 2, respectively. In addition, various components can be used as components other than the light source unit and the drive unit.
Specifically, as shown in FIG. 7, in the light source unit, the condensing optical system includes a parallelizing convex lens 29 provided to face each of the plurality of LED elements 27 constituting the light source unit 25, and It may be configured by a condensing convex lens 28 </ b> B provided so as to face the plurality of LED elements 27 through the parallelizing convex lens 29.
In FIG. 7, an optical path from the emitted light from the LED element 27 to the irradiation surface F (human skin) is indicated by a one-dot chain line.

DESCRIPTION OF SYMBOLS 10 Ultraviolet irradiator 16 for ultraviolet sensitivity measurement Flexible cable 19 External power source 20 Light source part 21 Support member 22 Small diameter part 23 Large diameter part 24 Cover member 25 Light source unit 26 Substrate 27 LED element 28A Convex convex lens 28B Condensing convex lens 29 Convex convex lens 30 Drive unit 31 Housing 33 Power supply unit 34 LED element drive unit 35 Control unit 36 Information recording unit 37 Input unit 38 Display unit 41 Frame member 41A for light exit opening Tubular portion 41B Gutter 42 Light exit port F Irradiation surface

Claims (9)

A light source unit comprising a plurality of types of LED elements having different emission center wavelengths, and emitting at least one continuous spectrum light of a continuous spectrum light in the wavelength range of 290 to 320 nm and a continuous spectrum light in the wavelength range of 320 to 400 nm; A drive unit having a control mechanism for independently controlling the drive of each of the plurality of types of LED elements constituting the light source unit;
An ultraviolet irradiator for measuring ultraviolet sensitivity, wherein the emitted light from the light source part is irradiated to an irradiation site in human skin.   The ultraviolet irradiator for measuring ultraviolet sensitivity according to claim 1, wherein continuous light having a wavelength of 290 to 400 nm is emitted from the light source unit. The plurality of types of LED elements constituting the light source unit include at least one type of LED element having a light emission center wavelength in a wavelength range of 290 to 320 nm, and the other one type of LED element having a wavelength range of 320 to 400 nm. Has an emission center wavelength,
The light emission center wavelength interval of two types of LED elements in which the light emission center wavelengths are close to each other in the plurality of types of LED elements constituting the light source unit is 10 to 20 nm. An ultraviolet irradiator for measuring ultraviolet sensitivity as described.   4. The degree of spectral coincidence, which is the ratio of the relative energy distribution of light emitted from the light source unit to the relative energy distribution of reference sunlight, is 75 to 125%. An ultraviolet irradiator for measuring ultraviolet sensitivity described in 1.   The plurality of types of LED elements constituting the light source unit are an LED element having an emission center wavelength at a wavelength of 310 nm, an LED element having an emission center wavelength at a wavelength of 325 nm, an LED element having an emission center wavelength at a wavelength of 340 nm, and emitting light at a wavelength of 355 nm. LED element having center wavelength, LED element having emission center wavelength at wavelength 365 nm, LED element having emission center wavelength at wavelength 375 nm, LED element having emission center wavelength at wavelength 385 nm, and LED element having emission center wavelength at wavelength 395 nm The ultraviolet irradiator for measuring ultraviolet sensitivity according to any one of claims 1 to 4, wherein the LED irradiator comprises at least eight kinds of LED elements.   The control mechanism has an output control function of adjusting the light intensity of the emitted light from the light source unit by independently controlling the output of each of the plurality of types of LED elements constituting the light source unit. The ultraviolet irradiator for measuring ultraviolet sensitivity according to any one of claims 1 to 5.   The said light source part is movably mechanically and electrically connected with respect to the said drive part by the flexible cable by which an electric power feeding line is coat | covered with the insulating material. An ultraviolet irradiator for measuring ultraviolet sensitivity according to any one of the above.   A light emitting opening frame-like member is provided in front of the light emitting direction of the light source part, which is made of an ultraviolet blocking material and is disposed so as to surround the optical path of the emitted light from the light source part. The ultraviolet irradiator for ultraviolet sensitivity measurement according to any one of claims 1 to 7.   9. The ultraviolet irradiator for measuring ultraviolet sensitivity according to claim 8, wherein a visible light transmissive region is formed in the frame member for the light exit opening.

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