A portable, rugged, inexpensive shearing interferometer is described and evaluated. Originally intended for application to plasma and flow analysis, it is also a suitable instructional aid. The shearing is obtained by the offset of the reflection from the first surface of a mirror relative to the reflection from the second surface when the mirror is set at an angle to the illuminating beam. The sensitivity is equivalent to that of a schlieren system. However, no schlieren quality components are involved and there are no critical adjustments or dimensions.
© 1970 Optical Society of America
Original Manuscript: September 3, 1969
Published: April 1, 1970
J. G. Kelley and R. A. Hargreaves, "A Rugged Inexpensive Shearing Interferometer," Appl. Opt. 9, 948-952 (1970)