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Polarizer assembly and a reflective modulation-imager projection system

A technology of projection system and polarizer, which is applied in the direction of instruments, optical components, projection devices, etc., and can solve the problem of limited illumination light

Active Publication Date: 2010-07-21
XIAN YISHEN OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of the most significant drawbacks of this microdisplay projection engine consisting of a single PBS and a single LCOS imager is that only a limited portion of the illumination light in one polarization state can be used to illuminate the LCOS imager, so, passing through the imager After modulation and reflection of , the total illumination light transmitted on the projection plane by the projection lens is very limited

Method used

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  • Polarizer assembly and a reflective modulation-imager projection system
  • Polarizer assembly and a reflective modulation-imager projection system
  • Polarizer assembly and a reflective modulation-imager projection system

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Embodiment 1

[0028] figure 1 A schematic structural diagram of a polarizer assembly provided in Embodiment 1 of the present invention, the polarizer assembly 500 includes a light source 400, a first reflective quarter complex wave plate 120, a second reflective quarter complex wave plate 110 and a polarized beam Light splitting component 200. The polarizing beam splitting assembly 200 may specifically include a first polarizing beam splitting film layer 221 and a second polarizing beam splitting film layer 222 in the form of a pair of V-shaped notches.

[0029] Such as figure 1 As shown, the light source 400 emits the illumination light 10 toward the polarized beam splitting component 200 along the first direction 51, the illumination light 10 includes the first polarized light 11 in the first polarization state 1 and the second polarized light in the second polarization state 2 Two polarized light 12, and the second polarization state 2 is orthogonal to the first polarization state 1. ...

Embodiment 2

[0048] figure 2 A cross-sectional view of a polarizer assembly provided for Embodiment 2 of the present invention. In this embodiment, the polarizer assembly 500 further includes a projected polarizer 310 , and the projected polarizer 310 is disposed on the outside of the output homogenizer 300 away from the polarized beam splitter 200 . The projection polarizing waveplate 310 is used to receive and transmit the first output light 31 and the second output light 32 in the second polarization state 2 passing through the output homogenizer 300, while absorbing or reflecting the light in the first polarization state 1 go back.

[0049] In addition, if figure 2 As shown, the polarizing beam splitting assembly 200 may further include a first three-sided prism 210, the first three-sided prism 210 includes a first side 210a, a second side 210b and a third side 210c, and the third side 210c faces the output homogenizer 300. The first polarized beam splitting film layer 221 and th...

Embodiment 3

[0056] image 3A cross-sectional view of a polarizer assembly applied to a reflective modulation imager projection system provided in Embodiment 3 of the present invention. In this embodiment, the reflection modulation imager projection system 600 includes a polarizer assembly 500 and a projection lens system 620 , and further includes at least one reflection polarization modulation imager 610 and a third polarization beam splitting film layer 630 .

[0057] The illumination light 10 passes through the polarizer assembly 500 , and the polarized illumination light composed of the first output light 31 and the second output light 32 both in the second polarization state 2 is guided to the third polarization beam splitting film layer 630 . In this embodiment, the third polarization beam splitting film layer 630 is configured mainly to transmit the first output light 31 and the second output light 32 both in the second polarization state 2 to the reflective polarization modulator ...

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Abstract

The present application relates to a polarizer assembly and a reflective modulation-imager projection system. The polarizer assembly comprises a light source, a polarization beam splitter assembly, a first reflective quarter wave composite plate and a second reflective quarter wave composite plate. The light source is used for inducing a first polarized light and a second polarized light in a first direction. The polarization beam splitter assembly comprises a first polarization beam splitting film and a second polarization beam splitting film. The first polarization beam splitting film is used for reflecting the first polarized light as a first polarization reflected light in a second direction while transmitting the second polarized light. The second polarization beam splitting film is used for transmitting the second polarized light. The first reflective quarter wave composite plate is used for reflecting, while polarization rotating as a third polarized light. The second polarization beam splitting film receives and reflects the third polarized light as a second polarization reflected light in the first polarization state. The second reflective quarter wave composite plate is used for respectively reflecting, while polarization rotating, the first polarization reflected light and the second polarization reflected light as a first output light and a second output light in the second polarization state in opposition to the second direction. The utilization ratio of the illumination lights could be increased.

Description

technical field [0001] The invention relates to a microdisplay projection system, in particular to a polarizer assembly and a reflective modulation imaging projection system, which is a microdisplay projection system using a reflective polarization microdisplay imager and a polarizing beam splitter. Background technique [0002] A typical microdisplay projection system employs a transmissive or reflective microdisplay imager, usually involving a light valve or array of light valves, that applies an image onto an illumination beam. One of the important advantages of reflective light valves over transmissive light valves is that reflective light valves allow the control circuitry to be placed behind reflective surfaces, so the substrate material for reflective devices does not have to be limited to transparent materials, which allows reflective devices More advanced integrated circuit technology can be used. [0003] Liquid-Crystal-On-Silicon (LCOS) imagers rotate polarized l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/28G03B21/14
CPCG03B21/14G02B27/1066G02B27/283G03B21/2073
Inventor 河·H·黄
Owner XIAN YISHEN OPTOELECTRONICS TECH CO LTD
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