Multiple exposure holographic interferometer method

Measuring and testing – Moisture content or absorption characteristic of material

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350 35, G01B 1116, G01B 902

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active

039344614

ABSTRACT:
Apparatus and method wherein a photographic plate is doubly exposed by pulsed laser illumination to record successive instants in the history of an object under consideration. The doubly exposed plate is then developed and the photograph or hologram is used to reproduce the object in full three-dimensional detail including subtle changes in the object in the form of interference fringes where the hologram is illuminated with continuous laser illumination.

REFERENCES:
patent: 3186294 (1965-06-01), Woodson
patent: 3548643 (1970-12-01), Leith et al.
patent: 3823604 (1974-07-01), Burch et al.
M. H. Horman, an Application of Wavefront Reconstruction to Interferometry, Applied Optics, Mar. 1965, pp. 333-336.
J. M. Burch, 1965 Viscount Nuffield Memorial Paper, Production Engineer, June 15, 1965 Preprint, 12 pp.
R. E. Brooks et al., Applied Physics Letters, Aug. 15, 1965, pp. 92-94.
R. J. Collier, et al., Applied Physics Letters, Oct. 15, 1965, pp. 223-225.
R. L. Powell, et al., J.O.S.A., Dec. 1965, pp. 1593-1598.
L. H. Tanner, J.S.I., Feb. 1966, pp. 81-83.

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