LIDAR scanning with expanded scan angle
AssigneeTexas Instruments Incorporated
InventorTerry A. Bartlett
Life of this patent
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Abstract
In described examples of a system for outputting a patterned light beam, the system includes: an illumination source; a positive optical element positioned to receive light from the illumination source and to output converging light; a reflective element positioned to receive the converging light from the positive optical element, the reflective element configured to reflect the converging light to form a scan beam; and a negative optical element to receive the scan beam from the reflective element, the negative optical element configured to output the scan beam to a field of view.
Claims20
A method comprising:
- obtaining, by at least one processor, an image pattern sequence;
- computing, by the at least one processor, a sequence of diffractive images corresponding to the image pattern sequence;
- correcting, by the at least one processor, the sequence of diffractive images to compensate for distortion by a spatial light modulator, to produce a sequence of corrected diffractive images;
- mapping, by the at least one processor, the sequence of corrected diffractive images to produce a mapped sequence of diffraction patterns;
- setting, by the spatial light modulator, elements of the spatial light modulator to the mapped sequence of diffraction patterns;
- and
- for the mapped sequence of quantized diffraction patterns displayed using the spatial light modulator, illuminating, by a light source, the spatial light modulator to produce the image pattern sequence.
A method comprising:
- determining, by at least one processor, an image pattern sequence;
- computing, by the at least one processor, a sequence of diffractive images corresponding to the image pattern sequence;
- correcting, by the at least one processor, the sequence of diffractive images to compensate for distortion by a spatial light modulator, to produce a sequence of corrected diffractive images;
- mapping, by the at least one processor, the sequence of corrected diffractive images to produce a mapped sequence of diffraction patterns;
- and
- storing, in memory, the mapped sequence of diffraction images.
A system comprising:
- a spatial light modulator;
- a light source optically coupled to the spatial light modulator;
- and
- at least one processor coupled to the spatial light modulator, the at least one processor configured to:
- obtain an image pattern sequence;
- compute a sequence of diffractive images corresponding to the image pattern sequence;
- correct the sequence of diffractive images to compensate for distortion by a spatial light modulator, to produce a sequence of corrected diffractive images;
- map the sequence of corrected diffractive images to produce a mapped sequence of diffraction patterns;
- and
- instruct the spatial light modulator to display the mapped sequence of diffraction patterns;
- wherein the spatial light modulator is configured to set elements based on the mapped sequence of diffraction patterns;
- and
- wherein the light source is configured to illuminate the spatial light modulator to produce the image pattern sequence.
Dependencies are inferred from the claim text.