Arrangement for displaying deformations of deformable structures

Details Arrangement for displaying deformations of deformable structures Arrangement for displaying deformations of deformable structures

1978-03-16

1981-12-08

Lee, John D.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356347, 365125, 430 1, G01B 9021

Patent

active

043044581

ABSTRACT:
The arrangement for displaying deformations of deformable structures by holographic interferometry, in which the interferogramme of the object is obtained by double exposure for an object subjected to periodic deformation or by prolonged exposure by comparison with the period of vibration for a vibrating object, comprises a recording electro-optical, photoconductive crystal to which is applied an electrical field substantially orthogonal to the mean direction of the fringes. The interferogramme is viewed in an image plane or recorded in a memory tube where it is desired to memorize the information because readout destroys the information. The arrangement can be made compact by integration of the displaying means in an enclosure. In that case, the source furnishes a reference beam and an object beam which are respectively directed towards the enclosure and the object by optic cables.

REFERENCES:
patent: 3652145 (1972-03-01), Thaxter
patent: 3717415 (1973-02-01), Woerdman
patent: 3762215 (1973-10-01), Aleksoff
patent: 3831153 (1974-08-01), Oliver et al.
patent: 3847465 (1974-11-01), Micheron et al.
patent: 3856986 (1974-12-01), Macovski
patent: 3897995 (1975-08-01), Penn
patent: 3899921 (1975-08-01), Hockley
patent: 3940203 (1976-02-01), La Russa
patent: 4124268 (1978-11-01), Micheron et al.
patent: 4138189 (1979-02-01), Huignard et al.
patent: 4205917 (1980-06-01), Abramson
Tseng et al., "Electro-Optical Memory with Write, Read and Erase . . . ", IBM Tech. Discl. Bull., vol. 15, No. 4, Sep. 1972, pp. 1327-1328.
Iwasa et al., "Bi.sub.12 SiO.sub.20 Block Data Composer . . . ", Digest of Tech. Papers of Top Mtg. on Optical Storage of Dig. Data, Mar. 1973, pp. TuB6-1-4.
Micheron et al., "High Photosensitivity Volume Hologram . . . ", Optics Communications, vol. 18, No. 2, Jul. 1976, pp. 216-217.

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