Grating monochromator/spectrograph
US7345760B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 13, 2006 |
| Grant date | Mar 18, 2008 |
| Priority date | — |
| Expiry date | Apr 24, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/0208
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A monochromator for use in a spectrograph admits light from an aperture to a primary reflector (preferably an off-axis parabolic mirror) which collimates the input light with low aberration and directs it to a diffraction grating. The component wavelengths of the input light are then directed to first and second secondary reflectors (preferably spherical or toroidal mirrors), which are chosen to cooperatively focus the component wavelengths in ordered bands across an array detector while each at least substantially cancels the effects of any aberrations introduced by the other. By choosing optical elements which supply the grating with input light with low aberration, and then choosing optical elements which receive the component wavelengths from the grating and which offset any aberrations introduced by the other receiving optical elements, wavelength resolution at the detector can be enhanced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.