Light combination module used for projector

Abstract

A light combination module used for a projector is provided, which comprises a light combination prism unit of a light extraction surface, a first light inducement surface, a second light inducement surface and a third light inducement surface, three groups of installation base plate units positioned on the base plate group of the light inducement surface, three liquid crystal panel units and three light polarizing and splitting units,. Each base plate group is provided with two base plates positioned on one of the light inducement surface in parallel and at interval, the materials of the base plate are selected from family group composed by materials with low thermal expansion coefficient, such as Fused Quartz (thermal expansion coefficient is 0.4 Mu m / m-DEG C.) or Silica Glass (thermal expansion coefficient is 0.75 Mu m / m- DEG C.) or Borofloat (thermal expansion coefficient is 3.25 Mu m / m- DEG C.), etc.

Description

technical field [0001] The invention relates to a light combination module, in particular to a light combination module used for a projector. Background technique [0002] As shown in FIG. 1 , an existing optical system of a projector includes a light emitting unit 1 , a light splitting unit 2 , a light sorting unit 3 , a light combining unit 4 , and a projection unit 5 . The light source emitting unit 1 has a light source 101 that can generate light, a lens array 102 that can uniformize the brightness of light, a light source reflector 103 that can reflect light, and a lens that can filter out invisible light and polarize visible light Group 104. The beam splitting unit 2 has a first beam splitter 201 , a second beam splitter 202 , a third beam splitter 203 , a first reflection mirror 204 , and a second reflection mirror 205 . The light organizing unit 3 includes three organizing groups 301 , and each organizing group 301 has a light collecting mirror 302 , a polarizing b...

AI Technical Summary

Problems solved by technology

In this way, the pixels of the liquid crystal panels 304 cannot be overlapped and defocused, which seriously affects the quality of projected images.

[0005] 2. Since each metal component (not shown) must fix a polarizing beam splitter 303 and a liquid crystal panel 304 at the same time, the structure of this metal component is relatively complicated and difficult to design, which easily leads to troubles in manufacturing and assembly

In addition, in order to ensure dimensional accuracy, such metal components require secondary processing such as milling after heat treatment, which is inconvenient for manufacturing

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