Illuminating system and method for improving asymmetric projection
First Claim
Patent Images
1. A system for improving asymmetric projection comprising:
- a light source producing a light beam to form a light path;
a projection lens which is disposed in the light path and projects an image;
a light valve inserted in the light path between the light source and the projection lens, which receives the light beam obliquely impinging from the light source to form a light spot, selects and reflects the light spot to the projection lens or predetermined directions; and
at least one anamorphic surface unit placed in the light path between the light source and the light valve, and having different curvatures on one surface to offset the distortion of the light spot resulting from obliquely impinging.
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Abstract
An illuminating system and method for improving asymmetric projection includes a light source producing a light beam to form a light path, a projection lens disposed in the light path, a light valve inserted in the light path between the light source and the projection lens, and at least one anamorphic surface unit placed in the light path between the light source and the light valve. The anamorphic surface unit offsets a distortion of a light spot resulted from obliquely incidence on the light valve, thus an asymmetric light spot can be improved as a more symmetric one to increase illuminating collection efficiency and uniformity.
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Citations
15 Claims
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1. A system for improving asymmetric projection comprising:
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a light source producing a light beam to form a light path; a projection lens which is disposed in the light path and projects an image; a light valve inserted in the light path between the light source and the projection lens, which receives the light beam obliquely impinging from the light source to form a light spot, selects and reflects the light spot to the projection lens or predetermined directions; and at least one anamorphic surface unit placed in the light path between the light source and the light valve, and having different curvatures on one surface to offset the distortion of the light spot resulting from obliquely impinging. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for improving asymmetric projection comprising:
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a light source producing a light beam to form a light path; a projection lens which is disposed in the light path and projects an image; a light valve inserted in the light path between the light source and the projection lens, which receives the light beam obliquely impinging from the light source to form a light spot, selects and reflects the light spot to the projection lens or predetermined directions; and at least one anamorphic surface unit placed in the light path between the light source and the light valve, which transmits the light spot and has different curvatures on one surface to offset the distortion of the light spot resulting from obliquely impinging. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A system for improving asymmetric projection comprising:
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a light source producing a light beam to form a light path; at least one anamorphic surface unit placed in the light path after the light source, which transmits the light beam and has different curvatures on one surface to offset the distortion of the light beam; a light valve inserted in the light path after the anamorphic surface unit, which receives the light beam obliquely impinging from the light source to form a light spot, selects and reflects the light spot to the projection lens or predetermined directions; and a projection lens which is disposed in the light path after the light valve for receiving the light spot to project an image. - View Dependent Claims (15)
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Specification