SU737693A1 - Illuminating device - Google Patents

Description

i

The invention relates to lighting technology, in particular to the technique of lighting plants and rooms that require constant comfortable parameters of the internal environment.

A lighting device is known comprising a light source placed between an interference reflector and a heat-reflecting protective glass and a heat radiation converter placed above the interference reflector 1.

The known device is ineffective, since it is useful to use a small fraction of the total emission spectrum of the light source.

The aim of the invention is to increase the efficiency of the device.

The goal is achieved by the fact that the device has an additional reflector of thermal radiation located above the converter of thermal radiation, while the section of the surface formed by the additional reflector and heat-reflecting protective glass has the shape of an ellipse, and the source and converter of thermal radiation are placed in its foci with this light source and transducer

thermal radiation is made point-like, the surface formed by an additional reflector and protective glass has the shape of an ellipsoid of rotation, and if the light source and the converter of thermal radiation are long, then the surface of the additional reflector and protective glass is shaped like an elliptical cylinder light and heat radiation converter, the additional reflector made of polyethylene terephthalant film stretched over frame.

FIG. I shows the optical layout of the lighting device; in fig. 2 shows an example of an apparatus with a light source and an extended-shape heat radiation transducer.

The device contains an interference reflector 1 and overlying its heat-reflecting protective glass 2, between which the source 3 of light is placed. Above the outer surface of the reflector 1 there is an additional reflector 4 of thermal radiation, and between them a converter of thermal radiation 5 is installed. The surface formed by the heat-reflecting protective glass 2 and the additional heat radiation reflector 4 has the shape of an ellipsoid of rotation with a point source 3 of light and a converter of heat radiation 5, and with an extended one the shape of an elliptical cylinder, which are parallel to the axis of the source 3 of the light and converter 4, with this source. 3 lights and a heat radiation converter 5 are placed at the foci of the rotation ellipsoid in the first case and the elliptical cylinder in the second. An additional reflector, when performed as part of an elliptical cylinder, is made, for example, from a polyethylene terephthalate film stretched over a forming frame. The device works as follows. , The radiation of the light source 3, falling on the surface of the interference reflector 1 and the protective glass 2 of heat reflecting, is divided into visible and thermal parts. The visible part of the radiation exits through the protective glass 2, either directly from the source 3 of the light, or reflected from the reflector 1, and hits the illuminated object. The heat part of the radiation passes through the reflector 1, falling on it directly from the light source 3 or reflecting from the borrowed glass 2. Since the light source 3 and the heat radiation converter 5 are located at the foci of an ellipsoid, which has the property of concentrating rays from another focus, the heat rays reflected either from the additional reflector 4 or from the protective glass 2 fall on the surface of the heat radiation converter 5.

Claims (4)

737693 Claim 4. An illumination device comprising a light source placed between an interference reflector and a heat reflecting protective glass and a heat radiation transducer placed above the interference Reflector, distinguished by the fact that, with an increase in efficiency, it has an additional heat reflector radiation, located above the converter of thermal radiation, while the cross section of the surface formed by an additional reflector and heat reflecting protective glass, has the shape of an ellipse, and the light source and the converter of thermal radiation are placed in its foci. 2. The device according to claim 1, characterized in that the light source and the heat radiation converter are dotted, and the surface formed by the additional reflector and the protective glass has the shape of an ellipsoid of rotation. 3. The device according to claim 1, characterized in that the source and converter of thermal radiation have an extended shape, and the surface of the additional reflector and protective glass is an elliptical cylinder, which form parallel to the axis of the light source and the converter of thermal radiation. 4. A device according to claim 3, characterized in that the additional reflector is made of a polyethylene terephthalate film stretched over the forming frame. Sources of information taken into account in the examination 1. Patent of Germany No. 1539465, cl. F21 V 29/00, published 1975 (prototype).