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Light source reflective device

A technology of optical devices and reflective devices, applied in projection devices, optics, optical components, etc., can solve problems such as poor contrast, wrong image colors, and affecting optical film properties

Inactive Publication Date: 2009-04-22
DELTA ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current application of digital projectors, when using the above-mentioned light source reflection device, since its focusing angle is usually 60° or greater, if you want to improve its optical lighting efficiency, the usual way is to increase the focusing angle, although it can effectively Collect more light efficiently, but too high light-gathering angle also seriously affects the characteristics of the optical film, making the output image color error or poor contrast

Method used

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Embodiment Construction

[0024] Fig. 2 shows a cross-sectional view of a light source reflecting device according to a first embodiment of the present invention. As shown in Figure 2, reflector 10 comprises a curved surface reflective surface 11, and point 12 represents a focal point of curved surface reflective surface 11 and a semi-sphere reflective surface (Semi-sphere) 15, wherein the center of sphere of hemispherical reflective surface 15 is located at On the point 12, that is, the focal point of the curved reflective surface 11 and the center of the sphere of the hemispherical reflective surface 15 are at the same position. Moreover, the curved reflective surface 11 is a semi-ellipsoid or a semi-paraboloid. As far as the situation in Fig. 2 is concerned, the curved reflective surface 11 is a semi-elliptical surface. The emitted light is reflected and gathered on another focal point 14 of the semi-elliptical surface. On the other hand, after the hemispherical reflective surface 15 reflects the l...

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Abstract

The light source reflecting device includes one curved reflecting surface to reflect the light beam from the light source in the focus of the curved reflecting surface, and one semi-spherical reflecting surface to reflect the light beam from the light source in the focus of the semi-spherical reflecting surface. The focus of the curved reflecting surface and the focus of the semi-spherical reflecting surface are in the same position, so that the light beam from the light source in the center of the semi-spherical reflecting surface is reflected by the semi-spherical reflecting surface to pass through the center and to irradiate the curved reflecting surface. All the light beams from the light source will pass through the focus and will be output from the curved reflecting surface, and this results in light beam with very small light converging angle and light converging area.

Description

technical field [0001] The invention relates to a light source reflection device and a light combination device, in particular to a reflection device and a light combination device capable of making reflected light have a very small light-gathering angle and a very small light-gathering area. Background technique [0002] FIG. 1 shows a cross-sectional view of a conventional light source reflection device 100 . As shown in FIG. 1 , the reflective device 100 includes a curved reflective surface 101 , where a point 102 represents a focal point of the curved reflective surface 101 . Generally speaking, the curved reflective surface 101 is an ellipse (Ellipsoid) or a paraboloid (Paraboloid). When a light source 103 with an arc gap (Arc gap) is placed at the point 102 to make it emit light, the curved reflective surface 101 of the ellipse reflects the light emitted by the light source 103 and gathers it on another focal point 104 of the ellipse, wherein The angle θ is defined a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/18G02B5/10G03B21/28
Inventor 张绍雄
Owner DELTA ELECTRONICS INC