Abstract

Holographic interferometry can be applied to plasmas whose density results in shifts of less than one fringe by superposing the small shifts on an arbitrarily shaped and positioned background fringe pattern. The sensitivity of holographic interferometry is thereby increased to that of conventional interferometry, while the inherent advantages of holography are retained. The background fringes also simplify detection of the spurious phase changes that can arise in holography from motions of the apparatus.

© 1967 Optical Society of America

Three-Beam Holographic Interferometry

Manoranjan De and Léandre Sevigny
Appl. Opt. 6(10) 1665-1671 (1967)

Improvement of Recorded Holographic Fringes By Feedback Control

Don B. Neumann and Harold W. Rose
Appl. Opt. 6(6) 1097-1104 (1967)

Method for fringe enhancement in holographic interferometry for measurement of in-plane displacements

Torgny E. Carlsson, Jonny Gustafsson, and Nils H. Abramson
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Fringe localization control in holographic interferometry

J. Blanco-García, J. L. Fernández, and M. Pérez-Amor
Appl. Opt. 31(4) 488-496 (1992)

Hologram–Moiré Interferometry for Transparent Objects

G. B. Brandt
Appl. Opt. 6(9) 1535-1540 (1967)