JPS61114214A - Light collecting device - Google Patents

Abstract

PURPOSE:To collect the sunshine efficiently at a narrow installation place by providing a light collecting plate with a reflecting surface which slants to its plate surface, and arranging an optical transmission line at the plate surface side of the light collecting plate opposite the reflecting surface. CONSTITUTION:The optical transmission line 6 which guides light collected by the light collecting plate 2 to a specific plate is arranged nearby the reverse surface (plate surface) of the light collecting plate 2 opposite the reflecting surface 5. The light collecting device is installed outdoors so that the top surface faces sky, and then the direct sunshine or skylight strikes the light collecting plate in any direction. The incident light in the visible range which is incident on the light collecting plate 2 activates (excite) the fluorescent material in the light collecting plate 2, so the fluorescent material radiates light which has spectral components deviating from the incident light to the infrared ranges in a radiation direction centered on the fluorescent material. Then, the radiation light from the fluorescent material is absorbed by another fluorescent material to generate new radiation light or reflected repeatedly and alternately by the upper and lower critical surfaces of the light collecting plate 2 or by a reflector 12 to travel in the light collecting plate 2 in the direction of its plate surfaces, so that the light is collected to the reflecting plates 5 eventually.

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention relates to a device that collects sunlight and transmits it to a predetermined amount. The invention relates to a daylighting device.

"Prior Art" Conventionally, as devices for collecting light in the oJ reconnaissance area, there are known devices that use direct light and devices that use sky light (indirect light).Direct light type As a device of 1
For example, a Fresnel lens is used to direct the source light and the resulting beam is transmitted through an optical fiber or the like. Also, as a sky light type device.

One example is one that uses a plurality of mirror reflectors arranged in parallel.

"Problems to be Solved by the Invention" By the way, when these devices are used to collect sunlight, the direct light type devices have a very serious drawback in that they cannot be used on cloudy days.

In addition, even in clear weather, incidental equipment such as a mechanical device (for example, an automatic sunlight tracking device) and an excitation source are required to keep the Fresnel lens pointing in the direction of sunlight incidence.
The entire device requires a lot of work, which limits the installation location and makes the device expensive. On the other hand, a skylight type device has the advantage of being usable on cloudy days, but has the drawbacks of a small lighting area and loss in transmission path gK.

Therefore, the applicant decided to create a transparent lighting plate with phosphors dispersed inside it as a lighting device that can be used easily by dog samurai by adopting both direct light and sky light. We have already provided ``lighting equipment'' that connects original transmission lines such as optical fibers to four cities. However, in this "daylighting device", it is necessary to pull out the original fiber from between the ends of the five daylighting plates in the direction of the surface of the daylighting plates. In addition, since the light of the entire lighting board is propagated to the end of the lighting board, there are still some issues that need to be improved, such as the larger the lighting board, the higher the attenuation rate of the light during propagation.

``Means for Solving the Problems'' The invention was made to solve the above-mentioned problems.The lighting board is provided with a reflective surface that is oblique to the board surface, and It is characterized by the fact that the original transmission line is placed opposite the reflecting surface in the .

``Function'' The uninvented lighting device: When 11 rays of light, etc. enter the lighting board, the phosphor is excited and emits light.

The light from this phosphor is collected by the reflective surface and reflected in the thickness direction of the lighting plate, and this reflected light is transmitted through the original transmission line.

"Example" Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

FIGS. 1 to 3 show an embodiment of the present invention, in which a transparent lighting plate 2 in the form of a flat plate is housed inside a protective case 1. A plurality of V-shaped groove-shaped recesses 3 having a depth M approximately equal to the thickness of the lighting plate 2 are provided on the upper surface (plate surface) of the lighting plate 2, and the four parts 30 are provided on the surface of the four parts 30 as shown in FIG. By pasting a reflective material 4 such as silver foil, a reflective surface 5 is provided which is inclined at an angle θ (for example, 45°) from the surface of the lighting plate 2C1. A transmission path 6 is disposed at a predetermined location near the lower surface (plate surface) of the lighting plate 2 and facing the reflecting surface 50 .

The protective case 1 includes a case body 7 whose receiver has a dish shape;
A transparent lid 8ζ that closes the upper part of the case body 7 and turns clockwise onto the top surface of the lighting plate 2, an auxiliary layer that covers the joint between the case body 7 and the lid 8, and the periphery of the 1IIIll wall of the case body. Cover 9 and n growling. The case body 7 has a large number of holes 10 penetrating its 11tll wall, and a reflective Fs11ya/Wi formed by pasting a metal 16 (for example, aluminum foil) on its inner surface.
Moreover, by reflecting the light with this reflective film 11, the efficiency of irradiating the light onto the daylighting plate 2 is increased. The body 8 is, for example, a flat tempered glass plate, and a reflective film N that reflects infrared rays, that is, heat rays is provided on the upper surface of the body 8.
(not shown) is provided to suppress the temperature rise inside the protective case 1. In addition, the auxiliary layer cover 9 has a chivalry hole 1.
This prevents the entry of music and rainwater from zero etc. into the protective case 1, maintains the top surface of the lighting plate 2 in a clean state, and prevents the case body 7 from corroding.

The lighting board 2 is made of Atsumachi plastic resin (e.g., acrylic resin or polycarbonate resin) and phosphor (e.g., Ca, B).
a, Mg, Zn, Cd, etc. 1') The main components are C1l compounds, sulfides, silicates, tungsten salts, etc., and Mn, A
(g, Cu, 8b, Pb, etc. are added as activators and fired) are uniformly dispersed and formed into a plate shape.
The meat 141ijiD and both sides can be formed by pasting a metal plate or metal foil, or by applying a metal potting process, as shown in FIG.
covered by. The lighting plate 2 is fixed to the bottom plate of the case body 7 by bolts 13 passing through it in the thickness direction, and is also fixed to the bottom plate of the case body 7 by spacers (for example, bolts) placed between it and the case body 7. It is held apart from the bottom plate part by a washer (14) inserted into the base plate (13).

The original transmission line 6 is in a state where it is burnt on the F plane (polished surface 15) with the number of sunlight 2 in the part directly under the fourth part 3, Tτ, 01, 90 in Figure 3, which caused multiple failures due to the concave part 3. It consists of an optical fiber assembly 16 that is not installed, and a holder 17 that fixes the end of this optical fiber assembly 16 to the case, and the former fiber assembly 16 is , previous dC
The fiber cables are traced through the fertile parts and pulled out toward the protective case 10F, and then bundled into a bundle to form the original fiber cable 18, which is laid to a predetermined location P7r.

When installed outdoors with the top surface of the source sampling plate 2 facing toward the sky, the lid 8 will be closed within the number of daylights 2, and the number 90 will be indicated by the arrow in Figure 1. Ku.

Direct sunlight and sky light enter from all directions. At this time, the incident light of the DJ viewing area that enters the light receiving area 2 excites the phosphor in the temporary 2, making the phosphor active 1: The phosphor is redder than the incident light. The spectrum jy, which is shifted to the outer region, is the radiation force 1 that closes the phosphor in the center.
0]. Next, the emitted light from the phosphor n) is absorbed by another phosphor and generates `ln' emitted light, or while repeating reflection alternately on the upper and lower critical surfaces of the number of light intakes, or.

While being reflected by the reflector 12, the light propagates inside the sample 512 in the direction of the plate surface, and is finally collected on the reflective surface 5. The fibers that are exposed to the reflective surface 5 are reflected downward (in the thickness direction of the lighting plate 2) as shown by the arrow in FIG. ! llIc
The incident light or the emitted light that is irradiated and further transmitted is reflected by the case body 7 11! It is reflected by III and enters the light receiving area 2 again to excite the phosphor.

On the other hand, FIG. 426 and FIG. 5 show other embodiments of the invention. In this lighting device, a large number of forest-like recesses 19 are provided on the upper surface of the lighting plate 2, and reflective surfaces 1-4 are provided on the surface of the recesses 19.
0 is formed, and furthermore, at a position facing this reflective surface 200,
The structure includes a Fresnel lens 21 facing the polished surface 15, and a source fiber 22 and a source transmission line 23 which directs the focal point 11tK of the Fresnel lens 21 to the right. In such a daylighting device, the emitted light from the phosphor is focused from the direction of radiation toward the 191 concave concave portions, that is, the conical concave reflective surface 20.
, the original χ reflected by these reflective surfaces 20 is the sharp Fresnel lens 21 shown by the arrow in Figure 5. Therefore, the number of ″/l fibers 220 used can be reduced.

In the above-mentioned embodiment, the configuration may be such that the side-by-side reflection curve 4 is omitted (Also, a reflective surface may be provided by making the end surface or side surface of the light receiving number 2 inclined with respect to the plate curve.

"Effects of Invention" As explained above, non-invention does not allow the following excellent effects to be obtained.

■ Provide a reflective surface that slopes against the board surface of the sampling board,
Since the original transmission line was placed at the opposite position of this reflecting surface, that is, at the curved surface of the light board (lower surface) 1lllll, by pulling the optical fiber etc. in the thickness direction of the light board, it was possible to turn the light board. The space occupied by the entire device can be reduced. In other words, the ratio of the number of daylights (lighting surface) to the space occupied by the device in the horizontal direction becomes unwieldy, so even in a narrow installation space, it is possible to efficiently daylight a large area.

- Since the light inside the lighting board is focused on the reflective surface provided halfway through the lighting board, it is possible to suppress attenuation of light within the lighting board. In other words, the number of daylights can be increased while maintaining the daylight efficiency at a certain level.

■ It can receive both direct light and angel light, so it has good lighting efficiency and can be used even on cloudy days.

■ No need for auxiliary equipment that requires a lot of effort, equipment costs are low, and installation #hFgr is not subject to any restrictions.

■ It operates just by placing it at the installation location, so maintenance costs are low (, 1L drive @ part JPa sword i1 part or electric circuit part is not required, so it is safe and has long-term reliability, and is easy to maintain. Easy to manage.

(2) By installing a Fresnel lens and providing an original fiber at a position opposite to the reflector, the number of optical fibers used can be reduced and a cheaper device can be obtained.

[Brief explanation of the drawing]

FIGS. 1 to 3 show an embodiment of the present invention, and FIG. 2 is an enlarged view of the portion indicated by the symbol "f" in FIG. 1, FIG. 3 is a perspective view of the lighting plate and the optical fiber assembly, and FIGS. *Example shown in Figure 4 is a perspective view of the lighting plate H and the optical fiber, and Figure 5 is a perspective view of the lighting plate H and the optical fiber.
It is a vv line arrow view of a figure. 1...Protective cape, 2...Lighting board, 3,19...
Recessed portion, 4... Metal reflective layer, 5.20... Reflective surface, 6
．． 23... Original transmission line, 16... Original fiber union,
18... Original fiber cable, 21 River Fresnel lens, 22... Yu fiber.

Claims (3)

[Claims] (1) A transparent lighting plate with fluorescent material dispersed therein is provided with a reflective surface that is inclined with respect to the plate surface of the lighting plate, and the reflective surface is placed near the plate surface and opposite the reflective surface. A lighting device equipped with an optical transmission line. (2) The lighting device according to claim 1, wherein the reflective surface is formed by providing a recess on a lighting plate and providing a metal reflective layer on the surface of the recess. (3) The optical transmission path is comprised of a Fresnel lens placed opposite a reflecting surface, and an optical fiber having an end facing the Fresnel lens. daylighting device.