System and method for recording interference fringes in a...

Details System and method for recording interference fringes in a... System and method for recording interference fringes in a...

G - Physics

11

B

G11B 7/0065 (2006.01) G02B 5/18 (2006.01)

Patent

CA 2359190

A system and a method for recording interference fringes in a photosensitive medium. Two light beams are guided along different light paths to impinge on a photosensitive medium, where they interfere to produce the interference fringes. One of the beam is reflected along its path on a delay mirror forming a fixed angle .PHI. with respect to the plane of the photosensitive medium. Both the photosensitive medium and delay mirror are translated with respect to the light paths of the two beams, thereby recording the interference fringes all along the medium. The angle .PHI. is chosen so that the interference pattern is fixed relative to the photosensitive medium along its length.

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