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Light-combining prism and mounting contraposition method thereof

A technology of combining prisms and right-angle prisms, applied in installation, optics, projection devices, etc., can solve the problems of easy deformation, low support strength, and decreased stability of combining prisms.

Inactive Publication Date: 2010-06-02
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the light-combining prism will mainly rely on the adhesive force of the adhesive, which is expressed as the shear force between the fog surface and the projection system to achieve fixed stability. However, under high temperature and other environments, the glue is easily deformed and the light-combining prism is stable. Once the position of the light-combining prism shifts, it will inevitably affect the light-combining effect and quality of the light-combining prism
In addition, the support surface fixed by this fixing method is also the upper and lower matte surfaces, obviously its support strength is low

Method used

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  • Light-combining prism and mounting contraposition method thereof
  • Light-combining prism and mounting contraposition method thereof
  • Light-combining prism and mounting contraposition method thereof

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Embodiment Construction

[0020] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0021] figure 2 It is a structural diagram of the light-combining prism 20 in the first embodiment of the present invention, which includes four right-angle prisms 21 , 22 , 23 , and 24 that are glued to each other. The light-combining prism also has four side surfaces 201 as light incident surfaces or exit surfaces, a first coating 202 that reflects light in the red band and penetrates light in other bands, and has a function of reflecting light in the blue band while others The second coating layer 203 with the light penetration function of the wavelength band.

[0022] image 3 Shown is one of the right-angle prisms 21 structural diagrams of the light-combining prism 20 of the first embodiment of the present invention, the four right-angle prisms forming the light-combining prism have similar structures, so one of the right-angle prisms 21 is selected to descri...

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Abstract

A light combination prism includes four right-angle prisms, wherein each right-angle prism includes an inclined plane, and two right-angle surfaces which intersect mutually and perpendicularly and intersect the inclined plane respectively. The four right-angle prisms are mutually agglutinated and connected, and a right-angle surface of at least one right-angle prism in the light combination prismprotrudes from the mutual agglutination part of the agglutinated right-angle prism. The light combination prism with the structure can reduce the alignment error during the light alignment, improve the alignment precision, and also can improve the stability and the supporting strength when the light combination prism is fixed. The invention further relates to a method for the installation and thecontraposition of the light combination prism.

Description

technical field [0001] The invention relates to a light-combining prism, in particular to a light-combining prism capable of accurately positioning the relative positions of incident light and the light-combining prism and improving the stability of fixing. Background technique [0002] The light-combining prism is an important optical element in the liquid crystal projection system. Its function is to synthesize the three primary color lights (red, green, blue) incident on the light-combining prism from different directions into a panchromatic light (white) to emit to the projection system. [0003] At present, the general light-combining prism is composed of four equal-length rectangular prisms. Wherein, each right-angle prism includes a slope opposite to the right angle and two right-angle surfaces perpendicularly intersecting each other and respectively intersecting the slope. The right-angle surface of each right-angle prism is coated with an optical film to form a coa...

Claims

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Application Information

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IPC IPC(8): G02B7/18G02B27/14G02B27/10G03B21/14
CPCG03B21/14G03B21/28G03B33/12
Inventor 徐碧聪
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD