# US 10,502,949 B2 · Multi-polygon laser scanner comprising pyramidal timing polygon

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,502,949 B2
- Document ID: US10502949B2
- Status: Granted
- Kind: B2
- Application number: 16/010,830
- Filed: 2018-06-18
- Published: 2019-10-10
- Granted: 2019-12-10
- Earliest claimed: 2018-04-04
- Assignees: Irvine Sensors Corporation
- Applicants: Irvine Sensors Corporation
- Inventors: Itzhak Sapir
- Web page: https://patentgrep.com/patent/US10502949B2

## CPC

- G02B 26/124: {Details of the optical system between the light source and the polygonal mirror (G02B26/123, G02B26/127 take precedence)}
- G01S 7/4814: {of transmitters alone}
- G01S 7/4817: {relating to scanning}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES

## Abstract

A LIDAR system comprising a pyramidal timing polygon is having a plurality of flat optically reflective facet surfaces. The pyramidal polygon comprises a plurality of spaced apart apertures disposed about the outer circumference thereof to define the plurality of radially disposed facets. The pyramidal polygon is rigidly attached and aligned with the rotating scanning polygon structures to define a pre-defined angular shift. The rotation of the three polygon assemblies is synchronized with a pulsed laser source whereby, for each laser pulse, the individual pyramid facets are disposed at a predetermined angle, such as a 45 degree angle, with respect to the incoming beam so as to direct it along the beam 1 reflective optical path.

## Claims

### Claim 1

A LIDAR system comprising:
a laser source for emitting a beam;
an inner scanning polygon and an outer scanning polygon each comprising a plurality of facets disposed on a lateral surface thereof;
a faceted beam steering element comprising a plurality of outwardly depending, radially-disposed, spaced-apart beam switching surfaces defining a plurality of apertures there between;
the faceted beam steering element, the inner scanning polygon and outer scanning polygon fixedly connected to each other and configured to rotate about a common axis;
the inner scanning polygon and outer scanning polygon having a predetermined angular shift between them;
a stationary reflective surface;
the beam configured to be incident upon the stationary reflective surface when passing through the aperture at a first rotational position of the faceted beam steering element whereby the beam is directed along a first beam path comprising a facet of the inner or outer scanning polygon; and;
the beam incident upon a beam switching surface at a second rotational position of the faceted beam steering element whereby the beam is directed along a second beam path comprising a facet of the respective other inner or outer polygon.