Patent · US Active

Sensor for the acquisition of an optical signal modulated at an acoustic frequency

US10986299B2 · kind B2 · utility

0Cited by

2References

13Claims

0Family size

Assignee

COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR

Inventor

Arnaud Verdant · Meylan, FR

Key dates

Filing date	Mar 31, 2020
Grant date	Apr 20, 2021
Priority date	—
Expiry date	Mar 31, 2040

Classification

Technology area (CPC G)Physics
CPC primaryG01N2021/451
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The present disclosure concerns a sensor for the acquisition of an optical signal modulated at an acoustic frequency, including a plurality of pixels, each including: a photodiode; an integration circuit configured to, at each period of the modulated optical signal, integrate a photocurrent delivered by the photodiode successively into K capacitors, K being an integer greater than or equal to 2; and a phase detection circuit configured to detect an order in the crossing of a predetermined voltage threshold by the K capacitors and to generate, according to the detected order, a signal representative of the phase of the modulated optical signal.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.