Display systems with spatial light modulators
First Claim
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1. A projection system, comprising:
- a light source providing a light beam, a lens, a surface diffuser, and a spatial light modulator disposed along a propagation path of the light beam; and
a moving mechanism coupled to an optical element within a propagation path of the light beam for moving said optical element so as to increase a uniformity of the illumination field of the light beam incident on the spatial light modulator.
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Abstract
A method and an optical system employing the same are provided for providing uniform illumination light with a desired illumination field using a surface diffuser.
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Citations
67 Claims
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1. A projection system, comprising:
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a light source providing a light beam, a lens, a surface diffuser, and a spatial light modulator disposed along a propagation path of the light beam; and a moving mechanism coupled to an optical element within a propagation path of the light beam for moving said optical element so as to increase a uniformity of the illumination field of the light beam incident on the spatial light modulator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method, comprising:
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providing a light beam; directing the light beam from the light source to an engineered diffuser; moving the optical diffuser relative to a propagation path of the light beam so as to increase a uniformity of an illuminated area of a spatial light modulator; and modulating the light beam output from the optical diffuser with a spatial light modulator. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A projection system, comprising:
a laser source providing a laser beam, a lens, an engineered diffuser, and a spatial light modulator disposed along a propagation path of the light beam, wherein the optical diffuser comprises a surface that is composed of a plurality of scattering centers with random profiles. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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44. A method, comprising:
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providing a laser beam with a laser source; directing the laser beam from the light source to an optical diffuser; transforming with the optical diffuser a first illumination field shape of the laser beam into a rectangular illumination field shape at far field, wherein the optical diffuser comprises a surface that is composed of a plurality of scattering centers of different profiles; and modulating the laser beam output from the optical diffuser with a spatial light modulator so as to form a desired image. - View Dependent Claims (45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55)
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56. A method, comprising:
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providing a laser beam with a laser source; directing the laser beam from the light source to a spatial light modulator through an optical diffuser; transforming with the optical diffuser a first illumination field shape of the laser beam into a second illumination field shape at far field, wherein an amount of light that is incident on the spatial light modulator compared to an amount of light that is incident on the diffuser is at least 80%; and modulating the laser beam output from the optical diffuser with a spatial light modulator so as to form a desired image. - View Dependent Claims (57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67)
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Specification