Monochromator having a concave holographic grating
US4068954A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 9, 1976 |
| Grant date | Jan 17, 1978 |
| Priority date | — |
| Expiry date | Jan 9, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/1838
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A monochromator having a concave holographic grating which is turnable in rotation and provided with an inlet slot parallel to the lines of the grating for incident light and an outlet slot also parallel to the lines of the grating, the inlet and outlet slots being disposed on opposite sides of a diametrial median plane P of the grating extending perpendicular to the lines of the grating and passing through the center of the grating. The bisector of the angle A, formed by two lines connecting the center of each slot to the center of the grating is contained in the plane P, the slots being additionally disposed such that the projection .alpha. of the angle A on the plane P is .ltoreq. 3.degree. and the projection .beta. of the angle A on the plane P' containing the bisector and perpendicular to the plane P is .ltoreq. 15.degree.. Two elementary monochromators can be connected in series and the gratings of the elementary monochromators are carried by a common rotation shaft, the image of the outlet slot of one elementary monochromator being sent to the inlet slot of the following monochromator by an optical system composed of planar mirrors, and a spherical mirror extending parallel …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.