Two-dimensional spectrometer
US4984888A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 13, 1989 |
| Grant date | Jan 15, 1991 |
| Priority date | — |
| Expiry date | Dec 13, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/2813
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention contemplates a two-dimensional spectrometer wherein a single catadioptric system is both the collimator and the camera for two-pass use of any two-dimensionally dispersed spectrometer. Off-axis aberration effects are minimized by arranging a fiber optic as the light-entrance aperture, on the central optical axis of the spectrometer and in close proximity to or centrally inserted in a two-dimensional array detector at the image plane. In other words, the grating of the spectrometer is also a reflector which folds admitted and dispersed light for return to the image plane along essentially the same path and through the same optical elements as are used on the incoming pass of light to the diffraction grating. The invention is shown for its applicability to each of various types of two-dimensional spectrometer-design configurations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.