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US 11,635,492 B2Granted
Projector with spatial light modulation
AssigneeMagic Leap, Inc.
InventorsDavid Cohen, Assaf Pelman, Robert D. TeKolste, Shlomo Felzenshtein, Giora Yahav
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Abstract
A time of flight based depth detection system is disclosed that includes a projector configured to sequentially emit multiple complementary illumination patterns. A sensor of the depth detection system is configured to capture the light from the illumination patterns reflecting off objects within the sensor's field of view. The data captured by the sensor can be used to filter out erroneous readings caused by light reflecting off multiple surfaces prior to returning to the sensor.
Claims5
A depth detection system, comprising:
- a plurality of light shaping components, comprising:
- a collimating optical element,
- a refractive optical element,
- a diffractive optical element, and
- a micro-lens array;
- a light source configured to emit light through the plurality of light shaping components;
- an imaging sensor configured to detect light emitted by the light source and reflected off objects within a field of view of the imaging sensor;
- and
- a processor configured to determine a distance between the depth detection system and the objects by filtering out sensor readings associated with light reflected off surfaces outside the field of view of the imaging sensor.
6 more elements
Dependencies are inferred from the claim text.