JPS6034201B2 - lighting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lighting fixture that strictly limits light in unnecessary directions.

In order to avoid illumination of roads and bridges from having a negative impact on surrounding crops and other traffic, it is sometimes necessary to severely restrict the emission of light from lighting equipment in unnecessary directions.

A simple method of blocking light is generally to attach louvers or hoods to lighting equipment, but the purpose is often not achieved because the light cannot be blocked sharply, and the louvers and hoods themselves reflect some light. . In order to improve the light-shielding properties, there is a method of installing a light-shielding plate in front of the light source in the lighting equipment, but it is difficult to make the reflecting mirror completely mirror-like, so some diffusion occurs, and the light reflected on the glass surface is The light is not completely blocked because it undergoes multiple reflections within the lighting equipment and exits as stray light. To solve this problem, the present invention realizes a lighting fixture that almost completely blocks light from unnecessary directions.

FIG. 1 shows a specific configuration diagram of a lighting fixture using the present invention. In the figure, 1 is a light source, and 2, 3, 4, and 5 are front reflectors. The front surfaces 2a, 3a, 4a, and 5a are mirror-finished, and the back surfaces 2b, 3b, 4b, and 5b are black to prevent reflection. It's painted. Reference numerals 6 and 7 denote rear reflecting mirrors which are similarly mirror-finished and shaped so that the light from the light source is reflected in a desired direction through the space between the front reflecting mirrors.

Reference numeral 8 denotes a light-shielding plate with anti-reflection treatment applied to both sides, and is placed in the radial direction with respect to the light source so as to prevent direct light from the light source from hitting it.

9 is a front glass for internal protection.

In the above configuration, most of the light emitted from the light source is reflected as shown by the dotted line and goes in the desired direction, but since the reflecting mirror is not a perfect mirror, a slight amount of diffuse reflection occurs as shown in the right half of FIG.

Also, as shown in the left half of the figure, reflection occurs on the front glass surface. In the present invention, in order to prevent these stray lights from exiting in unnecessary directions, the back surfaces 2b, 3b, 4b,
5b and the remaining surfaces of the light shielding plate 8 are coated with black paint to absorb most of the stray light. In addition, even if a general louver is subjected to anti-reflection treatment, when direct light from a light source or specularly reflected light from a reflector hits it, some of it is reflected and appears shiny, but in the present invention, the anti-reflection treatment is applied to the part that is exposed to direct sunlight. It is located in a position where it is not exposed to light or specularly reflected light, and the brightness of this surface can be well controlled. Furthermore, in order to perfect the light shielding properties, it is also possible to provide louvers in the form of extending the front reflecting mirrors 2, 3, 4, and 5 toward the glass surface side.
At this time as well, it is easy to control the direction of reflection by each reflecting mirror so that direct light and specularly reflected light do not hit the louver. As described above, by using the present invention, light in unnecessary directions can be almost completely blocked, and at the same time, all dark blue light emitted from the light source is directed in the desired direction by the reflector, resulting in a highly efficient lighting fixture. It is something that can be done.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the basic configuration of the present invention. FIG. 2 is a diagram showing the state of diffuse reflection of a reflecting mirror and surface reflection of a front glass. 1...Light source, 2-5
...Front reflector, 2a, 5a...Front surface (mirror-treated surface), 2b to 5b...Back surface (black painted surface), 6, 7...Rear Reflector, 8... Light shielding plate, 9... Front glass. Figure 1 Figure 2

Claims (1)

[Claims] 1 One side is mirror-treated, the other side is anti-reflection treated,
a plurality of reflecting mirror groups arranged inside the front glass at intervals to maintain an angle so that the mirror side surface reflects the light from the light source in a desired direction and at the same time prevent the light from the light source from leaking in unnecessary directions; A lighting equipment characterized by comprising a light-shielding plate with anti-reflection treatment applied to both surfaces, placed in the radial direction with respect to the light beam, in the center of the part of the group of reflecting mirrors where the mirror surfaces face each other.