Method for taking a spatially resolved spectrum by means of a fourier-transform (FT)-spectrometer and such spectrometer

US6930780B2 · kind B2 · utility

Assignee

• Bruker Optik GmbH · DE

Inventors

• Arno Simon · Ettlingen, DE
• Norbert Rapp · Malsch, DE

Key dates

• Filing date: Sep 6, 2002
• Grant date: Aug 16, 2005
• Expiry date: Jun 21, 2023

Classification

• Technology area (CPC G): Physics
• CPC primary: G01J3/453
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for taking a spatially resolved spectrum, in particular an infrared (IR) spectrum, of a sample by means of a Fourier-transform (FT)-spectrometer, is described wherein light emitted by a light source is fed to an interferometer, directed onto the sample and detected by an array-detector, wherein a movable reflector of the interferometer is displaced over a distance s and the array-detector is read out at a number n of predetermined discrete way points s1, . . . , sn of the distance s, respectively. When the movable reflector is displaced over the distance s, the array-detector is first read out at respective non-adjacent way points sd separated by at least one respective intermediate way point si, and that the movable reflector is displaced over the distance s at least twice, wherein the array-detector is read out at the way points si upon a second or further repeated displacement over the distance s.