Patent ID: 8605289
Filing Date: 2013-12-10
Classification: G01B,G02B

Abstract:
1. A method for interferometry comprising: producing an electromagnetic measurement signal; splitting the measurement signal into a scanning beam component and a reference beam component; illuminating at least one object point with at least a portion of the scanning beam component; producing an interference signal by superimposition of a component of the scanning beam component that has been reflected from the at least one object point with the reference beam component, wherein that portion of the scanning beam component in the interference signal which has been reflected from the at least one object point has an optical path-length difference x_O, which depends on the position of the object point, relative to the reference beam component, wherein the measurement signal is produced with a frequency comb spectrum with the same frequency comb intervals Δf_Signal of the individual frequency components, and/or wherein the interference signal is filtered by means of a frequency comb filter such that the filtered interference signal now has only a frequency comb spectrum with the same frequency comb intervals Δf_Signal of the individual frequency components; and wherein the method furthermore comprises: