Projectors of structured light
First Claim
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1. An optoelectronic device, comprising:
- a semiconductor substrate;
a monolithic array of light-emitting elements, arranged on the substrate in a two-dimensional pattern that is not a regular lattice;
a projection lens, which is mounted on the semiconductor substrate and is configured to collect and focus light emitted by the light-emitting elements so as to project an optical beam containing a light pattern corresponding to the two-dimensional pattern of the light-emitting elements on the substrate; and
a diffractive optical element (DOE), which is mounted on the substrate and is configured to expand the projected optical beam by producing multiple, mutually-adjacent replicas of the pattern.
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Abstract
Optical apparatus includes a beam source, which is configured to generate an optical beam having a pattern imposed thereon. A projection lens is configured to receive and project the optical beam so as to cast the pattern onto a first area in space having a first angular extent. A field multiplier is interposed between the projection lens and the first area and is configured to expand the projected optical beam so as to cast the pattern onto a second area in space having a second angular extent that is at least 50% greater than the first angular extent.
155 Citations
18 Claims
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1. An optoelectronic device, comprising:
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a semiconductor substrate; a monolithic array of light-emitting elements, arranged on the substrate in a two-dimensional pattern that is not a regular lattice; a projection lens, which is mounted on the semiconductor substrate and is configured to collect and focus light emitted by the light-emitting elements so as to project an optical beam containing a light pattern corresponding to the two-dimensional pattern of the light-emitting elements on the substrate; and a diffractive optical element (DOE), which is mounted on the substrate and is configured to expand the projected optical beam by producing multiple, mutually-adjacent replicas of the pattern. - View Dependent Claims (2, 3, 4)
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5. An optoelectronic device, comprising:
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a semiconductor substrate; and a monolithic array of light-emitting elements, arranged on the substrate in a two-dimensional pattern that is not a regular lattice, wherein the light-emitting elements comprise first and second sets of the light-emitting elements, wherein the first and second sets are interleaved on the substrate in respective first and second patterns, and wherein the device comprises first and second conductors, which are respectively connected to separately drive the first and second sets of the light-emitting elements so that the device selectably emits light in either or both of the first and second patterns. - View Dependent Claims (6, 7, 8)
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9. An optoelectronic device, comprising:
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a semiconductor substrate; a monolithic array of light-emitting elements, arranged on the substrate in a two-dimensional pattern that is not a regular lattice; and a single diffractive optical element (DOE), which is mounted on the semiconductor substrate and is configured to collect and focus light emitted by the light-emitting elements so as to project an optical beam containing a light pattern corresponding to the two-dimensional pattern of the light-emitting elements on the substrate while expanding the projected optical beam by producing multiple, mutually-adjacent replicas of the pattern. - View Dependent Claims (10, 11)
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12. A method for producing an optoelectronic device, the method comprising:
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providing a semiconductor substrate; forming a monolithic array of light-emitting elements on the substrate in a two-dimensional pattern that is not a regular lattice; mounting a projection lens on the semiconductor substrate so as to collect and focus light emitted by the light-emitting elements, thereby projecting an optical beam containing a light pattern corresponding to the two-dimensional pattern of the light-emitting elements on the substrate; and mounting a diffractive optical element (DOE) on the substrate so as to expand the projected optical beam by producing multiple, mutually-adjacent replicas of the pattern. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method for producing an optoelectronic device, the method comprising:
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providing a semiconductor substrate; forming a monolithic array of light-emitting elements on the substrate in a two-dimensional pattern that is not a regular lattice; and mounting on the substrate a single diffractive optical element (DOE) to collect and focus light emitted by the light-emitting elements so as to project an optical beam containing a light pattern corresponding to the two-dimensional pattern of the light-emitting elements on the substrate while expanding the projected optical beam by producing multiple, mutually-adjacent replicas of the pattern.
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Specification