Optical device, particularly for tuning the focal length of a lens of the device by means of optical feedback
US10684495B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2015 |
| Grant date | Jun 16, 2020 |
| Priority date | — |
| Expiry date | Jun 3, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/081
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates to an optical device, comprising: a lens having an adjustable focal length. According to the invention, a light source which is configured to emit light that is affected by said lens and impinges on at least a first photosensitive element, which is designed to generate a first output signal corresponding to the intensity of light impinging on it, wherein the first photosensitive element is configured to measure only a portion of the intensity distribution of said emitted light, and wherein the light source, the lens and the first photosensitive element are configured such that a change of the focal length of said lens changes the intensity distribution of the emitted light that impinges on the first photosensitive element, so that each focal length of the lens is associated to a specific first output signal generated by the first photosensitive element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.