Optical pattern projection
AssigneeHeptagon Micro Optics Pte. Ltd.
InventorMarkus Rossi
Life of this patent
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Abstract
This disclosure describes optical systems for projecting an irregular or complex pattern onto a region of space (e.g., a two-dimensional or three-dimensional object or scene). A respective light beam is emitted from each of a plurality of light sources. The emitted light beams collectively are diffracted in accordance with a plurality of different first grating parameters to produce a plurality of first diffracted light beams. The first diffracted light beams then collectively are diffracted in accordance with one or more second grating parameters.
Claims23
An optical projection sub-assembly comprising:
- a plurality of optical channels;
- a plurality of light sources each of which is operable to emit light into a respective one of the channels;
- one or more first gratings that collectively provide a plurality of different first grating parameters;
- and
- one or more second gratings that collectively provide at least one second grating parameter,
- wherein the one or more first gratings are arranged so that light emitted by the light sources is diffracted according to different ones of the first grating parameters to produce a plurality of first diffracted optical signals, and
- wherein the one or more second gratings are arranged to diffract the plurality of first diffracted optical signals.
(canceled)
(canceled)
A method of projecting an optical pattern onto an object or scene, the method comprising:
- emitting a respective light beam from each of a plurality of light sources;
- diffracting the emitted light beams collectively in accordance with a plurality of different first grating parameters to produce a plurality of first diffracted light beams;
- and
- diffracting the first diffracted light beams collectively in accordance with one or more second grating parameters to produce second diffracted light beams.
23-25. (canceled)
Dependencies are inferred from the claim text.