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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 10, Iss. 5 — May. 1, 1971
  • pp: 1148–1153

Application of Phase Modulation to Digital Data Recording By Means of Superposed Diffraction Gratings

L. L. Blackmer, A. P. VanKerkhove, J. G. Streiffert, and R. E. Baldwin  »View Author Affiliations


Applied Optics, Vol. 10, Issue 5, pp. 1148-1153 (1971)
http://dx.doi.org/10.1364/AO.10.001148


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Abstract

Optical phase modulation has been applied to a system for digital data recording based on the photography of a multiplicity of superposed interference fields. When piezoelectrically driven mirrors or electrooptic crystals are placed suitably in the interfering beams and sinusoidally excited to the proper amplitude, the corresponding fringe pattern exposure is effectively spoiled. Since the effect arises from variations in optical path or refractive index, tolerances on optical quality are relatively modest. Extinction ratios in excess of 100:1 are readily obtained.

© 1971 Optical Society of America

History
Original Manuscript: October 19, 1970
Published: May 1, 1971

Citation
L. L. Blackmer, A. P. VanKerkhove, J. G. Streiffert, and R. E. Baldwin, "Application of Phase Modulation to Digital Data Recording By Means of Superposed Diffraction Gratings," Appl. Opt. 10, 1148-1153 (1971)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-10-5-1148

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