Generally, in conventional optical interferometry, generation of speckles has been regarded as a noise and an error source degrading the reliability of the measurement because the phase is determined in a completely deterministic way. Recently, we have proposed and developed a new interferometric technique called statistical interferometry and demonstrated its validity^1,2). In the method, completely random wave fronts, i.e. speckle fields, play a role of the standard of phase in a statistical sense. In the present study, we have applied the statistical interferometry to the measurement of thermal expansion of an object.

Date Published: 1 September 1996
PDF: 2 pages
Proc. SPIE 2778, 17th Congress of the International Commission for Optics: Optics for Science and New Technology, 2778FJ (1 September 1996); doi: 10.1117/12.2316248

Published in SPIE Proceedings Vol. 2778:
17th Congress of the International Commission for Optics: Optics for Science and New Technology
Joon-Sung Chang; Jai-Hyung Lee; ChangHee Nam, Editor(s)