Echelle polychromator

US5448351A · kind A · utility

Assignee

• Bodenseewerk Perkin-Elmer GmbH · DE

Inventors

• Stefan Florek · Berlin, DE
• Helmut Becker-Ross · Berlin, DE

Key dates

• Filing date: May 16, 1994
• Grant date: Sep 5, 1995
• Expiry date: May 16, 2014

Classification

• Technology area (CPC G): Physics
• CPC primary: G01J2003/1828
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An Echelle polychromator 50 has disposed upstream thereof a pre-monochromator 14 comprising a prism 20. The linear dispersion of the pre-monochromator 14 is variable by varying the angular dispersion of the prism 20. A particular spectral position and the close vicinity thereof are analyzed by an Echelle grating 54 with high resolution. Care must be taken that, on the one hand, the detector array 66 of the Echelle polychromator 50 is fully exploited in response to the central wavelength respectively observed and that, on the other hand, interfering orders are kept away from the Echelle polychromator 50. The linear dispersion of the pre-monochromator is variable for this purpose.