System and method for reduction of image artifacts for laser projectors
First Claim
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1. A method for reducing visibility of image artifacts caused by diffractive elements in a laser projector having a structured diffractive device, comprising:
- selecting at least two diffracted orders of light from light emitted from the structured diffractive device using a spatial light filter;
changing a polarization of at least one of the selected diffracted orders with respect to another selected diffracted order; and
recombining the selected diffracted orders to form an image having reduced visible image artifacts.
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Abstract
A system and method is disclosed for reducing visibility of image artifacts caused by diffractive elements in a laser projector having a structured diffractive device. At least two diffracted orders of light can be selected from light emitted from the structured diffractive device using a spatial light filter. The polarization of at least one of the selected diffracted orders can be changed with respect to another selected diffracted order. The selected diffracted order can be recombined to form an image having reduced visible image artifacts.
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Citations
21 Claims
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1. A method for reducing visibility of image artifacts caused by diffractive elements in a laser projector having a structured diffractive device, comprising:
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selecting at least two diffracted orders of light from light emitted from the structured diffractive device using a spatial light filter; changing a polarization of at least one of the selected diffracted orders with respect to another selected diffracted order; and recombining the selected diffracted orders to form an image having reduced visible image artifacts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A system for reducing visibility of image artifacts caused by diffractive elements in a laser projector, comprising:
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a structured diffractive device; a focusing device configured to receive light from the structured diffractive device and focus the light to a desired location; a spatial filter located at a Fourier plane of the focusing device, wherein the spatial filter is configured to select at least two diffracted orders of light from the structured diffractive device; a polarization altering device configured to change a polarization of at least one of the selected diffracted orders with respect to another selected diffracted order; and a beam combiner configured to recombine the selected diffracted orders to form an image having reduced visible image artifacts. - View Dependent Claims (20)
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21. A system for reducing visibility of image artifacts caused by diffractive elements in a laser projector, comprising:
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a means for selecting at least two diffracted orders of light from light emitted from the structured diffractive device using a spatial light filter; a means for changing a polarization of at least one of the selected diffracted orders with respect to another selected diffracted order; and a means for recombining the selected diffracted orders to form an image having reduced visible image artifacts.
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Specification