Interferometer for measuring optical phase differences

Details Interferometer for measuring optical phase differences Interferometer for measuring optical phase differences

G - Physics

01

J

73/57

G01J 9/02 (2006.01) G01B 9/02 (2006.01) G02B 6/28 (2006.01)

Patent

CA 1316367

Abstract of the Disclosure For generating several interferograms which differ from each other in the relative phase position between the interfering partial beams, a light source is utilized having a coherence length less than the optical path difference between the two component beams in the measuring part of the interferometer. Furthermore, at least one optical delay device is provided which splits the beam into two component beams and which generates an optical path difference between these component beams which is approximately the same as the optical path difference of the partial beams in the measuring path of the interferometer. Thereafter, the delay device again unites the component beams congruently.

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