JPH03272502A - Illumination fixture - Google Patents

Abstract

PURPOSE:To prevent easy heating of not only the object to be irradiated but also the ceiling surface and wall surfaces by furnishing a first reflection body, which shuts off infrared beams while reflects visible rays, and a second reflection body which reflects the reflected beam from the first one and emits it. CONSTITUTION:Over a first dichroic mirror 14, a second dichroic mirror 15, for ex. cold mirror of plastics, as the second reflection body with a concave surface formed facing the undersurface whose outer dia. is approx. the same as the dia. of the bore of two oppositely situated frames 2 is placed on ring- shaped silicon rubber 16 fixed to the frames 2 slidably. When a light source 13 is lighted, the first dichroic mirror 14 admits penetration of infrared rays and shuts off reflection while reflects the visible rays. The second dichroic mirror 15, on the other hand, reflects the reflected visible rays and also the visible rays from the light source 13 while admits penetration of the infrared rays and emit them. Thereby the infrared rays are cast concentratedly in the projecting direction of the light flux and in the direction of ceiling on the back of the second dichroic mirror 15. Thus the ceiling surface and the wall surfaces are precluded from heating.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a lighting fixture used for flood lighting, such as a spotlight or a pendant.

(Prior Art) In a conventional lighting device used for this type of floodlight, a reflector that reflects light from a light source toward, for example, a product or exhibit is placed optically opposite the light source. has been done. In order to prevent the irradiated object in the emission direction from being heated by the infrared rays, this reflector is a dichroic mirror that reflects visible light and transmits infrared rays.

(Problem to be Solved by the Invention) However, as in the conventional configuration described above, when the reflector reflects visible light and transmits infrared light, the infrared light is not focused in the direction of the irradiated object. Although it is possible to prevent the irradiated object from being heated, there is a problem that the ceiling and wall surfaces are heated because most of the infrared light is focused and irradiated in the direction of the ceiling and wall surfaces. There is.

The present invention was made in view of the above-mentioned problems, and an object of the present invention is to provide a lighting fixture that is difficult to heat not only an object to be irradiated but also a ceiling surface, a wall surface, etc.

[Structure of the invention]

(Means for Solving the Problems) A lighting fixture of the present invention includes a first reflector that is provided facing a light source and reflects visible light and blocks infrared light, and a first reflector that reflects visible light and blocks infrared light. and a second reflector that reflects and outputs the light.

(Function) The present invention is a first reflector that reflects visible light without reflecting infrared light from a light source, and a second reflector that reflects light reflected from the first reflector. and output.

(Example) Hereinafter, one example of the lighting fixture of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes an instrument main body, and this instrument main body 1 is provided with four frame members 2 made of conductive wire rods such as metal. , an upper straight part 4 integrally formed on the upper part of the arc part 3, and an upper straight part 4 formed integrally with the upper part of the arc part 3;
It is formed of an upper straight part 4 integrally formed at the lower part of the holder and a lower straight part 5 formed in a substantially straight line. The upper positioning body 6 is made of an insulating acrylic disc and has positioning holes (not shown) provided in the four corners of the substantially square shape. The upper straight part 4 is inserted, and the lower part has three lower positioning bodies 7 formed similarly to the upper positioning body 6, and the lower straight part 5 is inserted into the positioning hole of the lower positioning body 7.
are inserted, and a spacer 9 is provided between these lower positioning bodies 7 with an insulating rubber backing 8 interposed therebetween.

Thus, the four frame members 2 are formed into a substantially spherical shape.

Further, a porcelain socket 11 is attached to the lower positioning body 7, and a halogen lamp 12, for example, is attached to this porcelain socket 11. The halogen lamp 12 includes a light source 13 and a glass dichroic mirror 14 as a first reflector having an upwardly curved concave surface so as to enclose the light source 13. Further, above the first dichroic mirror 14, there is a plastic cold reflector as a second reflector, which has a concave curved surface toward the lower surface, the inner diameter of which is approximately equal to the outer diameter between the opposing frame members 2. A second dichroic mirror 15 such as a mirror is placed on an annular silicone rubber 16 that is slidably attached to the frame member 2.

These dichroic mirrors 14 and 15 have an optical multilayer film formed on the surface of a mirror substrate made of glass, plastic, or aluminum, which is a thin member having a wall thickness of 125 ji, for example. This optical multilayer film is constructed by alternately laminating, for example, titanium oxide (T10□) film layers and silicon oxide (S10□) film layers, and the thickness and number of these film layers vary. Among the luminous flux from the light source 13, visible light is reflected and infrared light is transmitted.

Further, in this embodiment, as shown in FIG. 2, the upper straight part 4 of the frame member 2 of the instrument body 1 is connected to conductive wires 22 via a wire fixture 21, and these wires 22 are For example, it is attached to a mounting fixture 23 that is attached to a ceiling surface and has a built-in power source such as an electronic ballast.

Two of these wires 22 transmit power from a power source, and two frame members 2 connected to these wires 22
Power is supplied to the halogen lamp 12 via the halogen lamp 12.

Then, when the light source 13 is turned on, the first dichroic mirror 14 transmits infrared light, blocks reflection, and reflects visible light, as shown in FIG. 3 (1). The reflected visible light and the visible light from the light source 13 are reflected by the mirror 15, and the infrared light is transmitted and output. This configuration prevents infrared light from being concentrated in the irradiation direction of the luminous flux and in the direction of the ceiling surface on the back side of the second dichroic mirror 15.

Further, as shown in FIG. 3(b), by changing the angle of the second dichroic mirror 15, the irradiation direction of the light beam can be changed.

Further, in the above embodiment, the first dichroic mirror 1
4 is integrally formed with the halogen lamp 12,
It may be formed separately from the light source 13.

Further, in the above embodiment, a dichroic mirror is used as the second reflector, but a reflector made of aluminum or the like may also be used.

〔Effect of the invention〕

According to the present invention, the first reflector provided facing the light source reflects visible light and blocks infrared light, and the second reflector reflects light reflected from the first reflector. By reflecting the
Since the infrared light is not concentrated on the irradiated object, the ceiling surface, the wall surface, etc., it is possible to prevent not only the irradiated object but also the ceiling surface.

4,

[Brief explanation of drawings]

FIG. 1 shows a lighting fixture according to an embodiment of the present invention. 13. A light source, 14. A first dichroic mirror as a first reflector, 15. A second reflector. The second dichroic mirror Mineyuwara

Claims (1)

[Claims] (1) A first reflector that is provided facing the light source and reflects visible light and blocks infrared light, and a second reflector that reflects and outputs the reflected light from the first reflector.
A lighting device comprising: a reflector.