Optical sensor
US11480464B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2020 |
| Grant date | Oct 25, 2022 |
| Priority date | — |
| Expiry date | Jul 1, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2001/448
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Provided is an optical sensor including: a first photodetector including a first photodiode and having a first wavelength sensitivity characteristic; a first resistor having one end connected to a cathode of the first photodiode, and another end connected to a ground point; a second photodetector including a second photodiode and having a second wavelength sensitivity characteristic; a second resistor having one end connected to a cathode of the second photodiode, and another end connected to the ground point; and an amplifier circuit having a first input terminal connected to the first photodiode, a second input terminal connected to the second photodiode, and an output terminal configured to output a potential based on a potential of the first input terminal and a potential of the second input terminal, and using, as an operating power supply, electric power generated by electromotive force of the first photodetector and the second photodetector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.