Projection system and method
First Claim
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1. A projection system, comprising:
- an illumination source providing an illumination beam;
a modulator configured to modulate the illumination beam based on an image signal to form an image beam; and
a projection lens having an aberration profile and comprising a catadioptric lens, wherein the image signal is adjusted based on the aberration profile of the projection lens, and wherein the catadioptric lens is configured to receive the image beam along a first optical axis and fold and direct the image beam along a second optical axis such that a fold angle between the first and second optical axes is within a desired range.
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Abstract
A projection system including an illumination source providing an illumination beam, a modulator configured to modulate the illumination beam based on an image signal to form an image beam, and a projection lens having an aberration profile and comprising a catadioptric lens. The image signal is adjusted based on the aberration profile of the projection lens. The catadioptric lens is configured to receive the image beam along a first optical axis and fold and direct the image beam along a second optical axis such that a fold angle between the first and second optical axes is within a desired range.
85 Citations
30 Claims
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1. A projection system, comprising:
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an illumination source providing an illumination beam;
a modulator configured to modulate the illumination beam based on an image signal to form an image beam; and
a projection lens having an aberration profile and comprising a catadioptric lens, wherein the image signal is adjusted based on the aberration profile of the projection lens, and wherein the catadioptric lens is configured to receive the image beam along a first optical axis and fold and direct the image beam along a second optical axis such that a fold angle between the first and second optical axes is within a desired range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of operating a projection system, the method comprising:
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providing a projection lens having an aberration profile and including a catadioptric lens;
modulating an illumination beam based on the aberration profile of the projection lens and forming an image beam along a first projection path having a first optical axis; and
folding the image beam with the catadioptric lens and directing the image beam along a second projection path having a second optical axis, wherein the second optical axis forms a fold angle with the first optical axis which is within a desired range of angles. - View Dependent Claims (15, 16, 17, 18)
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19. A projection system, comprising:
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means for providing an illumination beam;
means for modulating the illumination beam and forming an image beam along a first projection path having a first optical axis; and
means for catadioptrically folding the image beam and directing the image beam along a second projection path having a second optical axis, wherein the second optical axis forms a fold angle with the first optical axis that is within a desired range of fold angles, wherein the means for catadioptrically folding the image beam has an aberration profile, and wherein the means for modulating the illumination beam includes means for modulating the illumination beam based on the aberration profile. - View Dependent Claims (20)
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21. A projection system, comprising:
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a projection lens having a known aberration profile and including;
a catadioptric lens having at least a first refractive surface and a reflective last surface; and
a field lens;
an illumination source providing an illumination beam; and
a modulator configured to modulate the illumination beam based on an image signal to form an image beam, wherein the image signal is adjusted based on the aberration profile of the projection lens, wherein the modulator is adapted to project the image beam along a first optical axis into the first refractive surface of the catadioptric lens, wherein the catadioptric lens is configured to fold and direct the image beam along a second optical axis such that a fold angle between the first and second optical axes is within a desired range, and wherein the field lens is positioned along the second optical axis and configured to project the image beam to a projection surface. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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29. A projection lens, comprising:
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a catadioptric lens having at least a first refractive surface and a reflective last surface; and
a field lens positioned in an optical path with the catadioptric lens, wherein the catadioptric lens and the field lens together have a known aberration profile, wherein the catadioptric lens is configured to receive an image beam adjusted based on the aberration profile along a first optical axis via the first refractive surface and configured to fold and direct the image beam to an exit pupil along a second optical axis such that a fold angle between the first and second optical axes is within a desired range, and wherein the field lens is positioned proximate the exit pupil and configured to receive and direct the image beam along a third optical axis to a projection surface. - View Dependent Claims (30)
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Specification