Patent ID: 6930780

Claim:
A method for taking a spatially resolved spectrum of a sample by means of a Fourier-transform (FT)-spectrometer, comprising the steps of: feeding light emitted by a light source to an interferometer, said interferometer comprising a movable reflector, and displacing said movable reflector along a distance s; directing said light coming from said interferometer onto said sample; detecting said light coming from said sample by an array-detector; and reading out said array-detector at a number n of predetermined discrete way points s 1 , . . . , s n of said distance s, respectively, wherein said array-detector is first read out at respective non-adjacent way points s d of said discrete way points s 1 , . . . , s n which are separated by at least one respective intermediate way point s i , and wherein said movable reflector is displaced over said distance s at least twice, wherein said array-detector is read out at said intermediate way points s i during a second or further repeated displacement of said reflector along said distance s.