POLARIZER ASSEMBLY AND A REFLECTIVE MODULATION-IMAGER PROJECTION SYSTEM
First Claim
1. A polarizer assembly, comprising:
- a light source, for inducing illumination light in a first direction, wherein the illumination light consists of first polarized light in first polarization state and second polarized light in second polarization state perpendicular to the first polarization state;
a polarization beam splitter assembly comprising;
a first polarization beam splitting film, for first receiving the illumination light at a first incident angle α and
reflecting the first polarized light as a first polarization reflected light in a second direction while transmitting the second polarized light, anda second polarization beam splitting film, for, at a second incident angle β
, receiving and transmitting the second polarized light passing through the first polarization beam splitting film; and
a first reflective quarter wave composite plate, for reflecting, while polarization rotating as a third polarized light in the first polarization state in opposition to the first direction, the second polarized light passing through the first polarization beam splitting film and the second polarization beam splitting film, wherein the second polarization beam splitting film receives and reflects the third polarized light as a second polarization reflected light in the first polarization state in the second direction;
a second reflective quarter wave composite plate, 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.
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Accused Products
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.
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Citations
24 Claims
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1. A polarizer assembly, comprising:
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a light source, for inducing illumination light in a first direction, wherein the illumination light consists of first polarized light in first polarization state and second polarized light in second polarization state perpendicular to the first polarization state; a polarization beam splitter assembly comprising; a first polarization beam splitting film, for first receiving the illumination light at a first incident angle α and
reflecting the first polarized light as a first polarization reflected light in a second direction while transmitting the second polarized light, anda second polarization beam splitting film, for, at a second incident angle β
, receiving and transmitting the second polarized light passing through the first polarization beam splitting film; anda first reflective quarter wave composite plate, for reflecting, while polarization rotating as a third polarized light in the first polarization state in opposition to the first direction, the second polarized light passing through the first polarization beam splitting film and the second polarization beam splitting film, wherein the second polarization beam splitting film receives and reflects the third polarized light as a second polarization reflected light in the first polarization state in the second direction; a second reflective quarter wave composite plate, 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification