Grating spectrometer

US4563090A · kind A · utility

Assignee

• Bodenseewerk Perkin-Elmer GmbH · DE

Inventor

• Wolfgang Witte · Überlingen, DE

Key dates

• Filing date: Jun 10, 1983
• Grant date: Jan 7, 1986
• Expiry date: Jun 10, 2003

Classification

• Technology area (CPC G): Physics
• CPC primary: G01J3/28
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In a grating spectrometer a signal spectrum is measured repeatedly while inserting different filters. The number of the filters and measurements correspond to the number of the occurring grating orders not suppressed. The signal spectra and the transmission characteristics of the filters are stored. A system of equations is achieved, from which a computer calculates the signal partial spectra associated with the individual grating orders. A total spectrum is composed from these signal partial spectra. Separation of the higher grating orders need not be effected optically, for example by cut-off filters.