Bichromatic optical cell
US6384403B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2000 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Mar 27, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V8/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A bichromatic optical cell fitted with two emitters 11, 12 capable respectively of generating a first beam E1 and a second beam E2 of different wavelengths &lgr;1, &lgr;2, and a receiver 14 arranged in a manner to receive, at a fixed or a variable angle of incidence, a beam reflected or able to be influenced by an object, coming from one or other of the emitters. Means 15, 16 of polarizing the first beam E1 are provided and the cell is fitted with means S of selecting a mode of operation M1 of the polarized reflex type or a second mode of operation M2 of the proximity type. The selection means S activate one or other of the emitters 11, 12 depending on the mode selected and block one or other of the output channels 14a, 14b of the receiver 14 and/or configure one active optical receiving area 14c of the receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.