Proximity sensor system with an infrared optical element
US10330789B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2018 |
| Grant date | Jun 25, 2019 |
| Priority date | — |
| Expiry date | Apr 10, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/66
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A proximity sensor system for detecting the presence of an object includes a light emitter configured to project light in a first direction, an optical element configured to steer the light, and a sensor. The optical element has a first surface configured to receive the light from the light emitter and a second surface that is non-parallel to the first surface. The second surface is configured to transmit a first portion of the light in a second direction and internally reflect a second portion of the light from the light emitter. The optical element includes a third surface configured to prevent internal reflection of the second portion of the light by the third surface. The sensor is configured to detect at least a portion of the first portion of the light returned from the object and transmitted through the second surface and the first surface of the optical element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.