Colour-mixing L-shaped combined prism

A prism and L-shaped technology, which is applied in the field of color separation and color combination system, can solve the problems of low yield, high price, and difficulty in ensuring that four right-angled ridges are closely connected and seamlessly integrated into one, etc., and achieves simple structure and flexible combination. Effect

Inactive Publication Date: 2004-09-01
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The processing, coating, and gluing of this kind of prism have very strict requirements, and it is difficult to ensure that the four right-angled ridges are seamlessly connected and integrated into one. Therefore, the yield is low and the price is high, and mass production and application promotion are greatly restricted.

Method used

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  • Colour-mixing L-shaped combined prism
  • Colour-mixing L-shaped combined prism

Examples

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Embodiment Construction

[0021] Fig. 1 is a schematic diagram of the structure of the quasi-L type color combination prism of the present invention.

[0022] As shown in the figure, the quasi-L-shaped color combination prism of the present invention is formed by gluing two parallelogram prism columns 1 and 2 and a right-angled triangular prism column 3 . The gluing surface N of two parallelogram prism columns 1 and 2 is the main color combination surface of the three color channels R, G, and B in the optical engine, and the gluing surface O of the parallelogram prism column 2 and the right-angled triangular prism column 3 is the optical The auxiliary color combining surface of the two color channels R and G in the engine, and the other working surface P of the parallelogram prism column 1 is a reflective surface, which reflects the light beam of another color channel B in the optical engine.

[0023] If the right-angled triangular prism column 4 is also glued on the P working surface of the parallelog...

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Abstract

Glueing two paralelogram type prism columns and two right-angled angled triangle type prism columns according to 'L' configuration form the L type combined prism with merged color. Multiple configurations can be formed that include two parallelogram type prism columns and one right-angled triangle type prism column, or one parallelogram type prism column and two right-angled triangle type prism columns to constitute the extended L type or quasi L type combined prism. The agglutination face of the combined prisms fall into three classes: the main merged color face with three color passages, the subsidiary merged color face with two color passages and the reflecting face with one color passage. The invention provides the features of simple structure, flexible combination, and no split joint area in the cross section of colour passage.

Description

Technical field: [0001] The invention is an L-shaped color combining and combining prism, which relates to a projector optical engine system, and more specifically relates to a color separation and color combining system of a front-projection projector optical engine. Applicable projectors mainly refer to front projection projectors composed of three transmissive LCD chips. The color separation and combination system mainly refers to the color separation and combination system composed of a dichroic mirror and a color combination mirror inside the optical engine, and also includes related half-wavelength plates, field mirrors, and polarizers. Background technique: [0002] The color separation and combination system is a key component of the optical engine of the projector, and the cost and main performance indicators of the projector are closely related to the color separation and combination system. In the prior art, the color separation and combination systems all take t...

Claims

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Application Information

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IPC IPC(8): G02B5/04G02B27/10G02B27/18
Inventor 黄维实庄松林窦晓鸣
Owner SHANGHAI JIAO TONG UNIV
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