Astigmatism compensation in spectrometers using non-spherical mirrors
US8757822B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 11, 2012 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | Jul 21, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S359/90
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of making specially shaped mirrors for astigmatism correction in spectrometers having a folded optical path using two mirrors by determining the curvature of one or both mirrors in the vertical direction such that the focal length in the sagittal direction of each of said one or both mirrors becomes the same as the focal length in the tangential direction wherein the radius of curvature of each of one or both mirror in the sagittal plane is adjusted to be equal to the radius of curvature in the tangential plane of each of one or both mirrors times the square of the cosign of the angle of incidence of the optical path at each of one or both mirrors is described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.