OPTICAL DESIGNS FOR ZERO ORDER REDUCTION
First Claim
Patent Images
1. Apparatus for projecting a pattern, comprising:
- a first diffractive optical element (DOE) configured to diffract an input beam so as to generate a first diffraction pattern on a first region of a surface, the first diffraction pattern comprising a zero order beam; and
a second DOE configured to diffract the zero order beam so as to generate a second diffraction pattern on a second region of the surface such that the first and the second regions together at least partially cover the surface.
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Abstract
Apparatus for projecting a pattern includes a first diffractive optical element (DOE) configured to diffract an input beam so as to generate a first diffraction pattern on a first region of a surface, the first diffraction pattern including a zero order beam. A second DOE is configured to diffract the zero order beam so as to generate a second diffraction pattern on a second region of the surface such that the first and the second regions together at least partially cover the surface.
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Citations
23 Claims
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1. Apparatus for projecting a pattern, comprising:
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a first diffractive optical element (DOE) configured to diffract an input beam so as to generate a first diffraction pattern on a first region of a surface, the first diffraction pattern comprising a zero order beam; and a second DOE configured to diffract the zero order beam so as to generate a second diffraction pattern on a second region of the surface such that the first and the second regions together at least partially cover the surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. Apparatus for projecting a pattern, comprising:
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a first diffractive optical element (DOE) configured to diffract an input beam so as to generate a plurality of separate output beams; and a second DOE configured to apply a diffractive effect to the plurality of separate output beams so as to generate a respective plurality of diffraction patterns on respective regions of a surface such that the respective regions together at least partially cover the surface. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. Apparatus for projecting a pattern, comprising:
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a diffractive optical element (DOE) configured to diffract an input beam having a wavelength so as to generate a diffraction pattern comprising a zero order beam; and a narrow-band filter, which is tuned to the wavelength of the input beam and is positioned with respect to the DOE so as to cause the diffraction pattern, absent the zero order beam, to impinge on a region of a surface. - View Dependent Claims (19, 20)
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21. A method for projecting a pattern, comprising:
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diffracting an input beam with a first diffractive optical element (DOE) so as to generate a first diffraction pattern on a first region of a surface, the first diffraction pattern comprising a zero order beam; and diffracting the zero order beam with a second DOE so as to generate a second diffraction pattern on a second region of the surface such that the first and the second regions together at least partially cover the surface.
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22. A method for projecting a pattern, comprising:
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diffracting an input beam with a first diffractive optical element (DOE) so as to generate a plurality of separate output beams; and applying a diffractive effect to the plurality of separate output beams with a second DOE so as to generate a respective plurality of diffraction patterns on respective regions of a surface such that the respective regions together at least partially cover the surface.
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23. A method for projecting a pattern, comprising:
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diffracting an input beam having a wavelength with a diffractive optical element (DOE) so as to generate a diffraction pattern, which comprises a zero order beam; positioning a narrow-band filter, which is tuned to the wavelength of the input beam, with respect to the DOE so as to cause the diffraction pattern, absent the zero order beam, to impinge on a region of the surface.
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Specification