System and method for recording interference fringes in a photosensitive medium
AssigneeTeraxion Inc.
InventorFrançois Trépanier
Life of this patent
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Abstract
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 φ 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 φ is chosen so that the interference pattern is fixed relative to the photosensitive medium along its length.
Claims14
An interferometric recording system for recording interference fringes in a photosensitive medium extending in a recording plane, the system comprising:
- light generating means for generating first and second coherent light beams;
- a guiding assembly for respectively guiding the first and second light beams along first and second light paths leading to a recording location on the photosensitive medium, the first and second light beams generating the interference fringes at the recording location, the guiding assembly comprising a delay mirror disposed in the first light path to reflect the first light beam, the delay mirror being interdependent with the photosensitive medium and forming a fixed angle φ with the recording plane;
- and
- translating means for translating both the photosensitive medium and the delay mirror together with respect to the first and second light paths, thereby moving the recording location along the photosensitive medium and moving the interference fringes along the recording location, the angle φ being selected to operationally couple said moving of the recording location and interference fringes.
A method for recording interference fringes in a photosensitive medium extending in a recording plane, the method comprising steps of:
- a) generating first and second coherent light beams;
- b) respectively guiding the first and second light beams along first and second light paths leading to a recording location on the photosensitive medium, the first and second light beams generating the interference fringes at the recording location, the first light beam being reflected on a delay mirror disposed in the first light path, the delay mirror being interdependent with the photosensitive medium and forming a fixed angle φ with the recording plane;
- and
- c) translating both the photosensitive medium and the delay mirror together with respect to the first and second light paths, thereby moving the recording location along the photosensitive medium and moving the interference fringes along the recording location, the angle φ being selected to operationally couple said moving of the recording location and interference fringes.
Dependencies are inferred from the claim text.