Abstract

New methods are introduced that utilize interferometric comparison of images of diffusely reflecting objects from different hologram plates that are sandwiched together. To make the plate positions optically and mechanically identical during reconstruction and exposure, they are also exposed in sandwiches. If the two sandwiched hologram plates are separated by a small distance a new method of fringe evaluation can be used. Fringes caused by object tilt between two exposures can be eliminated by an analogous, but much larger, tilt of the sandwich hologram during reconstruction. Even the direction of tilt, forward or backward, is found this way.

© 1974 Optical Society of America

Sandwich hologram interferometry. 3:Contouring

Nils Abramson
Appl. Opt. 15(1) 200-205 (1976)

Pulsed sandwich holography

Hans Bjelkhagen
Appl. Opt. 16(6) 1727-1731 (1977)

Sandwich Hologram Interferometry. 2: Some Practical Calculations

Nils Abramson
Appl. Opt. 14(4) 981-984 (1975)

Sandwich hologram interferometry. 4: Holographic studies of two milling machines

Nils Abramson
Appl. Opt. 16(9) 2521-2531 (1977)

Sandwich hologram interferometry. 5: Measurement of in-plane displacement and compensation for rigid body motion

Nils Abramson and Hans Bjelkhagen
Appl. Opt. 18(16) 2870-2880 (1979)