Double monochromator
US4371263A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 1978 |
| Grant date | Feb 1, 1983 |
| Priority date | — |
| Expiry date | Jul 6, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A double monochromator having a principal stage and a pre-monochromator or first stage that includes a coarse reflecting plane diffraction grating and a concave mirror for converging the object beam on the grating and for imaging the selected band of diffracted light from the grating on the entrance slit of the principal or second stage. The first stage spectral bandwidth is much larger than the second stage, thus permitting use of a grating having a groove spacing approximately ten times that of the second stage grating, and the use of linear wavelength adjusting means. The imaging mirror results in a shorter image and object distance and therefore a smaller convenient instrument.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.