Optical apparatus with beam steering and position feedback
First Claim
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1. Optical apparatus, comprising:
- a pattern projector, comprising optical components arranged along an optical axis, the optical components comprising;
a radiation source, which is configured to emit optical radiation;
projection optics configured to collect and collimate the optical radiation emitted by the radiation source; and
a diffractive optical element (DOE), which is positioned to receive the optical radiation collimated by the projection optics and to produce and project a pattern toward a target;
an actuator configured to translate the projection optics in a direction transverse to the optical axis;
an optical sensor configured to detect an optical signal that is indicative of a shift of the projected pattern; and
a processor, which is configured to drive the actuator to translate the projection optics responsively to the optical signal detected by the optical sensor.
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Abstract
A method for projection includes projecting a pattern toward a target by directing optical radiation, which is collimated along an optical axis by projection optics, through a diffractive optical element (DOE). An optical signal that is indicative of a shift of the projected pattern is detected. An actuator is driven to translate the projection lens in a direction transverse to the optical axis responsively to the detected optical signal.
14 Citations
20 Claims
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1. Optical apparatus, comprising:
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a pattern projector, comprising optical components arranged along an optical axis, the optical components comprising; a radiation source, which is configured to emit optical radiation; projection optics configured to collect and collimate the optical radiation emitted by the radiation source; and a diffractive optical element (DOE), which is positioned to receive the optical radiation collimated by the projection optics and to produce and project a pattern toward a target; an actuator configured to translate the projection optics in a direction transverse to the optical axis; an optical sensor configured to detect an optical signal that is indicative of a shift of the projected pattern; and a processor, which is configured to drive the actuator to translate the projection optics responsively to the optical signal detected by the optical sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for projection, comprising:
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projecting a pattern toward a target by directing optical radiation, which is collimated along an optical axis by projection optics, through a diffractive optical element (DOE); detecting an optical signal that is indicative of a shift of the projected pattern; and driving an actuator to translate the projection lens in a direction transverse to the optical axis responsively to the detected optical signal. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification