Light beam polarization converter
First Claim
1. A light beam polarization converter for converting an illumination light source having a plurality of polarization states into a polarization light source, comprising:
- an under plate having undulated lower and upper surfaces in conjugate to each other for converging and parallelizing the light beams respectively;
a substrate having an upper surface and a ridged lower surface disposed on the under plate;
a phase retardation film of high reflectivity disposed partially on the ridged lower surface of the substrate; and
a polarization splitting film disposed on the substrate, providing transmission of predetermined polarization states and reflection of predetermined polarization states of the illumination light source.
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Accused Products
Abstract
A light beam polarization converter for converting non-polarized light beams of an illumination source having a plurality of polarization states into a single polarization state is disclosed. The light beams from the bottom converged by the lower surface of the under plate and further parallelized by the upper surface thereof enter the converter. After a series of optical processes of polarization splitting, reflection or total reflection, and phase retardation within the converter, the light beams will pass through the converter as light beams of a single polarization state.
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Citations
35 Claims
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1. A light beam polarization converter for converting an illumination light source having a plurality of polarization states into a polarization light source, comprising:
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an under plate having undulated lower and upper surfaces in conjugate to each other for converging and parallelizing the light beams respectively;
a substrate having an upper surface and a ridged lower surface disposed on the under plate;
a phase retardation film of high reflectivity disposed partially on the ridged lower surface of the substrate; and
a polarization splitting film disposed on the substrate, providing transmission of predetermined polarization states and reflection of predetermined polarization states of the illumination light source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A light beam polarization converter for converting an illumination light source having a plurality of polarization states into a polarization light source, comprising:
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an under plate having undulated lower and upper surfaces in conjugate to each other for converging and parallelizing the light beams respectively;
a substrate having an upper surface and a ridged lower surface providing total reflection of the light beams disposed on the under plate; and
a polarization splitting film disposed on the substrate, providing transmission of predetermined polarization states and reflection of predetermined polarization states of the illumination light source. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A light beam polarization converter for converting an illumination light source having a plurality of polarization states into a polarization light source, comprising:
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an under plate having undulated lower and upper surfaces in conjugate to each other for converging and parallelizing the light beams respectively;
a substrate having a ridged upper surface and a ridged lower surface disposed on the under plate;
a phase retardation film of high reflectivity disposed partially on the lower surface of the substrate;
an upper cover having a ridged lower surface, substantially complementary to the ridged upper surface of the substrate and facing therewith, and an upper surface; and
a thin film disposed between the upper cover and the substrate, the index of refraction thereof is different from that of the substrate. - View Dependent Claims (29, 30, 31)
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32. A light beam polarization converter for converting an illumination light source having a plurality of polarization states into a polarization light source, comprising:
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an under plate having undulated lower and upper surfaces in conjugate to each other for converging and parallelizing the light beams respectively;
a substrate having a ridged upper surface and a ridged lower surface providing total reflection of the light beams disposed on the under plate;
an upper cover having a ridged lower surface, substantially complementary to the ridged upper surface of the substrate and facing therewith, and an upper surface; and
a thin film disposed between the upper cover and the substrate, the index of refraction thereof is different from that of the substrate. - View Dependent Claims (33, 34, 35)
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Specification