Hologram fringe stabilization method
A common problem in many hologram recording systems is lack of stability in the fringes at the film plane during exposure. This instability may result from thermal drift or vibration in the components of the system, or a combination of unequal pathlengths and laser frequency drift, or even turbulence in the air surrounding the system. The result, in any case, is reduced contrast in the recorded fringes and loss of diffraction efficiency in the final hologram. The method described was designed to provide stabilization and precision control of the phase of the fringes at the hologram plane. It was used in a system for generating synthetic holograms in which phase control and resetability within 10/sup 0/ was essential. Other less critical hologram or grating recording applications might also benefit from the increased fringe contrast obtained by stabilization with or without the control feature.
- Research Organization:
- Univ. of California, Livermore
- OSTI ID:
- 5140184
- Journal Information:
- Appl. Opt.; (United States), Journal Name: Appl. Opt.; (United States) Vol. 16:2; ISSN APOPA
- Country of Publication:
- United States
- Language:
- English
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