Patent ID: 7330267
Filing Date: 2008-02-12
Classification: G01J

Abstract:
1. An apparatus for optical spectroscopy having means for producing an interference pattern by superimposing part rays, a spatially resolving detector structured and arranged to record the thus-produced interference pattern, and spectrally dispersive or diffractive optical elements comprising as said interference pattern-producing means, a diffraction grating (G), structured and arranged to influence wavefronts of at least one of part rays involved in the interference pattern, wherein said diffraction grating (G) is structured and arranged as a beam splitting device and to produce the part rays at different orders of orders of diffraction, and additionally comprising means arranged for reflecting back both part rays to said diffraction grating (G), structured and arranged such that one of the two part rays to be superimposed is reflected by said grating (G) at zero order diffraction, the other part ray is diffracted by said diffraction grating (G) at a first order diffraction and said part rays have different diameters.