Light beam polarization converter for converting an illumination light source
AssigneeSlight Opto-Electronics Co., Ltd.
InventorsChih-Kung Lee, Chih-Ting Lin, Shu-Sheng Lee, Ching-Heng Tang
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Abstract
A light beam polarization converter converts non-polarized light beams of an illumination source having a plurality of polarization states into a single polarization state. 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.
Claims8
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 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.
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 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.
Dependencies are inferred from the claim text.