Lateral shear interferometer using twin three-beam holograms
Abstract
A lateral shear interferometer using twin three-beam holograms is described. In the interferometer two first-order diffracted light beams from the first hologram play the role of a beam splitter; the second hologram eliminates the effect of tilt. This interferometer has two advantages over the single three-beam hologram lateral shear interferometer: (1) it can be used for small f/No. lens tests; (2) any small aberration of the optical system of the interferometer can be canceled by using the second hologram. In this paper, shearing interferograms of lens aberration, of refractive indices around a flame, and of spouting gas are demonstrated.
- Publication:
-
Applied Optics
- Pub Date:
- August 1980
- DOI:
- 10.1364/AO.19.002643
- Bibcode:
- 1980ApOpt..19.2643M
- Keywords:
-
- Holographic Interferometry;
- Holography;
- Interferometers;
- Light Beams;
- Aberration;
- Diffraction Patterns;
- Optical Data Processing;
- Refractivity;
- Systems Engineering;
- Instrumentation and Photography;
- HOLOGRAPHY;
- INTERFEROMETERS