High durability and high performance polarization optics using a low-elasticity organic layer
AssigneeReal D
InventorsGary D. Sharp, Michael G. Robinson, Jianmin Chen
Life of this patent
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Abstract
Described is an optical compensator device that can maintain a high degree of performance in the demanding environment of projection display. A mounting process involves using a sealant between optically clear glass or ceramic substrate and low elastic polymer retarder film. The sealant may mitigate or prevent the degradation of the retarder film by acting as an oxygen barrier that seals the substrate and increases the lifetime of the device in high luminance.
Claims25
An optical projection system having a projection light path and comprising:
- a light source for providing a projection light, the light source being positioned at the beginning of the projection light path;
- a projection lens positioned at the ending of the projection light path;
- and
- a compensating optical component positioned in the projection light path, the compensating optical component being exposed to high-intensity light at its position in the projection light path, wherein the compensating optical component comprises:
- a retarder film characterized by a retardance, the retarder film being susceptible to undergoing a photochemical reaction when exposed to the high-intensity light, wherein the photochemical reaction would alter the retardance of the retarder film;
- and
- a sealing element at least partially surrounding the retarder film, whereby the sealing element, by itself or with another element, is operable to provide a hermetic seal that encloses the retarder film and substantially limits the photochemical reaction that would have otherwise altered the retardance of the retarder film.
An optical projection system having a projection light path and comprising:
- a light source for providing a projection light, the light source being positioned at the beginning of the projection light path;
- a projection lens positioned at the ending of the projection light path;
- and
- a compensating optical component positioned in the projection light path, the compensating optical component being exposed to high-intensity light at its position in the projection light path, wherein the compensating optical component comprises:
- a retarder film characterized by a retardance, the retarder film being susceptible to undergoing a photochemical reaction when exposed to the high-intensity light, wherein the photochemical reaction would alter the retardance of the retarder film;
- first and second substrate layers adjacent to the retarder film and on opposite sides of the retarder film;
- and
- a sealing element connected to the first and second substrate layers, wherein the sealing element is an edge substantially sealing the first and second substrate layers together, whereby the edge seal and the first and second substrate layers are operable to provide a hermetic seal that encloses the retarder film and substantially limits the photochemical reaction that would have otherwise altered the retardance of the retarder film.
Dependencies are inferred from the claim text.