One-beam interferometer by beam folding.
A novel one-beam interferometer based on beam folding is described. The device resembles a Mach-Zehnder interferometer in which the two arms are located together in one collimated beam. Different halves of the same beam interfere with the help of a mirror--with its reflecting surface along the axis of the optical system--placed near the focal plane of the imaging lens. Phase-delay control is achieved by application of an electrical potential to a Pockels cell, which permits the use of techniques of phase-stepping interferometry.
Ferrari
José A
JA
Facultad de Ingeniería, Instituto de Física, Montevideo, Uruguay. jferrari@fing.edu.uy
Frins
Erna M
EM