Back to results
US 2020/0026065 A1Published application
Angular Velocity Correction of a Scanning Light Beam by Optical Methods
AssigneeMicrovision, Inc.
InventorsP. Selvan Viswanathan, Matthieu Saracco, Roger F. Johnson, Ian Blanch
Life of this patent
Estimating the term…
Abstract
An angular velocity correcting optical device receives a sinusoidally swept input light beam and outputs a non-sinusoidally swept output beam. The output beam may have a constant angular velocity. The output beam may have a constant pitch on a target surface for a constant periodicity pulsed light beam. Optical surfaces may be freeform surfaces specified by polynomials.
Claims20
An optical device comprising:
- at least one first optical surface to refract light from a light source;
- and
- at least one second optical surface to refract light received from the at least one first optical surface, wherein the at least one first optical surface and the at least one second optical surface are shaped so that a light ray emerging from the at least one second optical surface sweeps substantially non-sinusoidally when a light ray from the light source sweeps sinusoidally.
An apparatus comprising:
- at least one laser light source;
- a scanning mirror that scans light from the at least one laser light source sinusoidally in at least one dimension;
- and
- an optical system that includes at least two curved optical surfaces, wherein the at least two curved optical surfaces are shaped to emit a substantially non-sinusoidally swept light ray when receiving a sinusoidally swept light ray from the scanning mirror.
1 more element
A method comprising:
- producing laser light pulses;
- scanning the laser light pulses sinusoidally in at least one dimension;
- and
- passing sinusoidally scanned laser light pulses through at least two curved optical surfaces that emit laser light pulses at a constant angular velocity.
1 more element
Dependencies are inferred from the claim text.