System for, and method of, regulating the wavelength of a light beam
US5025445A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1989 |
| Grant date | Jun 18, 1991 |
| Priority date | — |
| Expiry date | Nov 22, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/13
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A laser light beam is processed in a first optical path to produce light indications in a plurality of free spectral paths. These light indications are introduced through slits to produce signals at spaced positions at the opposite peripheries of a linear detector array. The distances between correlated pairs of energized detectors at the opposite peripheries of the array indicate the relative value of the laser wavelength in the free spectral ranges. The laser light beam is also processed in a second optical path, simultaneously with the processing of the laser light beam in the first optical path, to produce light in a single path. The second optical path is dependent upon the wavelength of the laser light beam. The light produced in the second optical path may be introduced through another slit to energize centrally disposed detectors in the array. The particular detectors energized are dependent upon the wavelength of the laser light. The detectors in the linear array may be scanned to produce signals related in time to the disposition of the detectors energized in the array. A data processing system processes these signals and produces a signal to adjust the wavelength of the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.