Holographic lidar system and method
AssigneeEnvisics Ltd
InventorsJamieson Christmas, Dackson Masiyano, Mikael Collin
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Abstract
There is provided a lighting device arranged to produce a controllable light beam for illuminating a scene. The device comprises an addressable spatial light modulator arranged to provide a selectable phase delay distribution to a beam of incident light. The device further comprises Fourier optics arranged to receive phase-modulated light from the spatial light modulator and form a light distribution. The device further comprises projection optics arranged to project the light distribution to form a pattern of illumination as said controllable light beam.
Claims23
A method for performing a light detection and ranging (“LIDAR”) measurement on a scene, comprising:
- providing a beam of incident infrared light;
- illuminating an addressable spatial light modulator with the beam of incident infrared light;
- providing, using the spatial light modulator, a selectable phase delay distribution to the beam of incident infrared light with the addressable spatial modulator to provide an exit beam, the phase delay distribution comprising a representation of a pattern of illumination in the hologram domain, and
- performing holographic transformation of the pattern of illumination in the hologram domain, such that the phase-modulated light of the exit beam forms an image in the spatial domain;
- projecting the image in the spatial domain to form a pattern of infrared illumination in space, the pattern of infrared illumination in space illuminating the scene;
- and
- detecting infrared illumination reflected from the scene, wherein the detection of infrared illumination reflected from the scene comprises capturing with an infrared detector an image of the scene illuminated with the pattern of infrared illumination in space.
A method for performing a light detection and ranging (“LIDAR”) measurement on a scene, comprising:
- providing a beam of incident infrared light;
- illuminating an addressable spatial light modulator with the beam of incident infrared light;
- providing, using the spatial light modulator, a selectable phase delay distribution to the beam of incident infrared light with the addressable spatial modulator to provide an exit beam, the phase delay distribution comprising a representation of a pattern of illumination in the hologram domain, and
- performing a frequency-space transformation such that the exit beam forms an image in the spatial domain;
- and
- projecting the image in the spatial domain to form a pattern of infrared illumination in space, the pattern of infrared illumination in space illuminating the scene;
- and
- detecting infrared illumination reflected from the scene, wherein the detection of infrared illumination reflected from the scene comprises capturing with an infrared detector an image of the scene illuminated with the pattern of infrared illumination in space.
Dependencies are inferred from the claim text.