Speckle shearing interferometry using a liquid-crystal cell as a phase shifter

Hirofumi Kadono; Satoru Toyooka

doi:10.1117/12.34730

1 July 1990 Speckle shearing interferometry using a liquid-crystal cell as a phase shifter

Hirofumi Kadono, Satoru Toyooka

Proceedings Volume 1319, Optics in Complex Systems; (1990) https://doi.org/10.1117/12.34730
Event: 15th International Optics in Complex Systems, 1990, Garmisch, Germany

Abstract

A new type of speckle shearing interferometer is proposed and studied experimentally. In the method a liquid-crystal is employed as a phase shifter to apply the phase shifting method for the conventional speckle shearing interferometer. The phase of the transmitted light is changed due to its birefringent property for the applied electric field. It is shown from the measurements of the fundamental properties of the liquid-crystal that the additional phase introduced between the sheared two images can be precisely controlled up to about 2ir by changing the applying voltage. From the experiments to measure the deformation of an object having a rough surface usefulness of the method is confirmed. 1.

Citation Download Citation

Hirofumi Kadono and Satoru Toyooka "Speckle shearing interferometry using a liquid-crystal cell as a phase shifter", Proc. SPIE 1319, Optics in Complex Systems, (1 July 1990); https://doi.org/10.1117/12.34730

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