JPH02288008A - lighting equipment - Google Patents

Abstract

PURPOSE:To enhance brilliance with increased color luminosity for providing vivid looking and ensure ease of manufacture and stabilized characteristics by providing a reflecting body which has, on its base, a dielectric multi-layer film and an optical multi-layer film which suppresses reflection over a range with specific wavelength light selected as its center. CONSTITUTION:A reflecting body 5 is made up of a base 10 made of glass, etc., a dielectric multi-layer film 11 formed opposedly on the base 10, and an optical multi-layer film 13 consisting of either a semiconductor (e.g., Ge) layer film or a metal (e.g., Cr or Al) layer film which has 40-70% visible light reflectivity. The multi-layer film 11 is formed by alternately laminating, in four layers, a high refraction material (e.g., TiO2) film layer 14 and a low refraction material (e.g., SiO) film layer 15. The light from a light source lamp 6 strikes the reflecting body 5 where it is reflected by the multi-layer film 13. The reflected light is then sent out through a radiation opening portion 7. Because of its reduced reflectivity over a range with 580-600nm light serving as its center, the reflected light can enhance color luminosity.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a lighting fixture such as a spotlight, and relates to one used in a lighting facility suitable for lighting a store, for example.

(Prior Art) Conventional reflectors of this type of lighting equipment are composed of an optical multilayer film consisting of a substrate made of glass or metal and a dielectric multilayer film formed on the surface of this substrate. However, a configuration was adopted in which the light incident on the reflector was reflected by the reflector.

(Problem to be Solved by the Invention) In order to increase the brightness and saturation of colors and make them appear vivid by using a reflector formed with an optical multilayer film made of such a dielectric multilayer film, light of 580 to 600 nm is used. In order to keep it at the center, it is necessary to laminate about 20 layers of the optical multilayer film, which is not easy to manufacture and has the problem that the color of the irradiated light differs depending on each reflector.

The present invention was made in view of the above-mentioned problems, and the number of layers of the optical multilayer film of the reflector can be relatively reduced, and light of 580 to 600 ni can be mainly suppressed with a small number of optical multilayer films. , it is easy to manufacture a reflector that increases the brightness and saturation of colors to make them look vivid, and the illumination is equipped with a reflector that provides stable colored reflected light without changing the color of the emitted light from each reflector. It provides equipment.

[Structure of the invention]

(Means for Solving the Problems) A lighting fixture of the present invention includes a light source and a reflector disposed optically opposite to the light source, and the reflector includes a substrate and a reflector that faces the substrate. A dielectric multilayer film is provided to reflect visible light from the light source, and an optical multilayer film is interposed between the dielectric multilayer film and the substrate and is composed of a semiconductor layer film or a metal layer film, Multilayer film is 580-600nm
It is characterized by suppressing the reflection of light.

(Function) In the lighting device of the present invention, the light that is incident on the reflector from the light source is divided into light that is reflected at the boundary between the semiconductor or metal layer of the optical multilayer film and the dielectric multilayer film, and light that is reflected between the dielectric multilayer film and the It is possible to suppress the light reflected by the 580 to 600 nm wavelength, which has a color rendering effect, and increase the brightness and saturation of the colors to make them appear more vivid.

(Example) The configuration of an embodiment of the present invention will be described with reference to the drawings.

Reference numeral 1 denotes a main body of the apparatus, which is attached to the tip of a support 2 which is attached to a structure such as a ceiling surface so that its horizontal and vertical directions can be adjusted. A lamp socket 3 is provided approximately at the center of the front surface of the appliance body 1. Further, a substantially cylindrical shade 4 is attached to the front side of the instrument main body 1, and a reflector 5 is fitted and held in this shade 4. The reflector 5 includes a lamp 6 that serves as a light source such as a single-cap halogen lamp or a high-intensity discharge lamp attached to the lamp socket 3, has an irradiation opening 7 on the front surface, and has an optical opening 7 for illuminating the lamp 6. The lamps 6 are disposed facing each other, and the light from the lamps 6 is reflected and emitted from the front illumination opening 7 of the reflector 5. Further, a substantially cylindrical holder 8 for holding the reflector 5 is attached to the front opening of the shade 4.

As shown in FIG. 2, the reflector 5 includes a substrate 10 made of glass, an aluminum plate, a heat-resistant synthetic resin, etc., and a dielectric multilayer film formed opposite to the surface of the substrate 10. 11, and a semiconductor or metal film layer 12 formed between the dielectric multilayer film 11 and the substrate 10 and having a visible light reflectance of 40 to 70%! It consists of 3. This dielectric multilayer film 11 is made by alternately stacking four layers of a high refractive material, such as titanium oxide (TiO2) film layer 14, and a low refractive material, such as a silicon oxide (Sin2) film layer 15. It is formed by The semiconductor layer 12 formed on the surface of this dielectric multilayer film 11 is a semiconductor such as germanium (Ge), and the metal layer 12 is formed by vapor deposition of a metal such as chromium (C'') or aluminum (^1). has been done.

Next, the operation of this embodiment will be explained.

When the light source lamp 6 of a lighting fixture such as a spotlight attached to the ceiling of a building is turned on, the light from the light source lamp 6 is incident on the reflector 5 and the optical multilayer film 13 of the reflector 5 is turned on. The reflected light is reflected at the irradiation opening 7 as a desired reflected light. The optical multilayer film 13 has a visible light reflectance of 40 to 70% between the light reflected at the interface between the semiconductor layer film or metal film layer 12 and the dielectric multilayer film 11 and the dielectric layer film 11. The reflected light has spectral reflection characteristics as shown in Figure 4, and is emitted with a suppressed reflectance centering on light in the 580 to 600 nm range, increasing the brightness and saturation of the colors and making them look vivid. The desired reflected light illumination can be obtained.

Next, the specific configuration of the reflector 5 is shown in the following table.

However, λO is the control wavelength.

In this reflector, the semiconductor layer film and the dielectric layer film! 1
The light reflected at the interface with io2 and the light reflected by SiO□ of the dielectric layer film 11 are emitted with the reflectance of the 580I light being suppressed.

The configuration of the reflector 5 is not limited to the configuration shown in the above table, but may also be configured as shown in the following table.

In this way, the structure of the reflector 5 can be configured such that a predetermined spectral reflectance can be obtained by changing the number of dielectric multilayer films, film thickness, etc.

〔Effect of the invention〕

According to the present invention, the reflector disposed optically facing the light source includes a substrate, a dielectric multilayer film that is disposed opposite to the substrate and reflects visible light from the light source, and the dielectric multilayer film. The optical multilayer film is interposed between the film and the substrate and is composed of a semiconductor layer film or a metal layer film, and the optical multilayer film is 580
Since reflection is suppressed mainly for light of ~600 nm, the light that enters the reflector from the light source is different from the light reflected at the boundary between the semiconductor or metal layer of the optical multilayer film and the dielectric multilayer film. It suppresses the light reflected between the dielectric multilayer films, focusing on the light of 580 to 600 nm, which has a color rendering effect, and increases the brightness and saturation of colors to make them look vivid. It is possible to obtain a reflector with stable characteristics without variations, which can be produced in small quantities and easily manufactured.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway side view of a lighting fixture showing an embodiment of the present invention, Fig. 2 is a longitudinal sectional side view of the same reflector, and Fig.
The figure is an enlarged longitudinal sectional view of the reflector shown above, and FIG. 4 is a spectral reflectance characteristic diagram shown above. 5. Reflector, 6. Light source, 10. Substrate, 11. Dielectric multilayer film, 12. Semiconductor layer film or metal layer film layer, 13
...Optical multilayer film. April 2, 1989 Inventor Tatsuo Maruyama

Claims (1)

[Claims] (1) A light source and a reflector disposed optically opposite to the light source, the reflector including a substrate and a dielectric body disposed opposite to the substrate and reflecting visible light from the light source. It consists of a multilayer film and an optical multilayer film interposed between the dielectric multilayer film and the substrate and consisting of a semiconductor layer film or a metal layer film, and the optical multilayer film reflects light mainly in the wavelength range of 580 to 600 nm. Lighting equipment characterized by suppressing