Patent · US Expired

Attenuator for stray light produced in monochromators

US4300835A · kind A · utility

8Cited by

0References

2Claims

0Family size

Assignee

Bodenseewerk Perkin-Elmer GmbH · DE

Inventors

Dieter Schiemann · Überlingen, DE
Wolfgang Witte · Überlingen, DE

Key dates

Filing date	May 2, 1980
Grant date	Nov 17, 1981
Priority date	—
Expiry date	May 2, 2000

Classification

Technology area (CPC G)Physics
CPC primaryG01J3/18
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Stray light produced in a monochromator by the diffuse reflection of the incoming light beam specularly reflected from the surface of the diffraction grating is practically eliminated by interposing a black glass "absorbent-reflector" in the path of the specularly reflected beam. The small percentage of radiation that is not absorbed by the absorbing glass is reflected to an opposite blackened wall which diffuse reflects an extremely small percentage of the beam back to the absorbent-reflector where a very negligible part is returned to the grating surface and eventually to the monochromator exit slit.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.