Optical system and method for eliminating overlap of diffraction spectra
US5424827A · kind A · utility
118Cited by
7References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1993 |
| Grant date | Jun 13, 1995 |
| Priority date | — |
| Expiry date | Apr 30, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/1828
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical system and a method for separating overlapping spectra from a diffraction grating and an imaging spectrometer with increased free spectral range are disclosed. The light from a diffraction grating consists of multiple spectra overlapping each other and displaced along a spectral axis. The invention directs the light from the grating to a refractive element such, as a prism. The prism further disperses the light along the same spectral axis. The individual spectra are sufficiently displaced such that they no longer interfere with each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.