Projectors of structured light
AssigneePrimesense Ltd.
InventorsBenny Pesach, Zafrir Mor
Life of this patent
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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.
Claims18
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.
An optoelectronic device, comprising:
- 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.
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;
- 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.
A method for producing an optoelectronic device, the method comprising:
- 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.
A method for producing an optoelectronic device, the method comprising:
- 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.
Dependencies are inferred from the claim text.