Sinusoidal optical emission method, and corresponding circuit
US10003174B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 17, 2017 |
| Grant date | Jun 19, 2018 |
| Priority date | — |
| Expiry date | May 17, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/42
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical emitting circuit includes an array of M optical sources distributed in N groups, where N is lower than M. A controller is configured to generate N periodic square wave control signals that are successively mutually phase shifted by pi/N and that all have the same period, and to cyclically activate/deactivate all the optical sources of the N groups using the control signals. The optical emitting circuit is configured so that each group is activated when a corresponding control signal is in its first state and deactivated when the corresponding control signal is in its second state. The number of optical sources in each group and the order of the groups in the sequence of activations/deactivations are chosen so as to generate an optical signal having an amplitude that sinusoidally varies in steps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.