18 September 1996 Interferometers with self-pumped phase-conjugate mirror for testing aspherical and cylindrical surfaces
Author Affiliations +
Proceedings Volume 2782, Optical Inspection and Micromeasurements; (1996) https://doi.org/10.1117/12.250803
Event: Lasers, Optics, and Vision for Productivity in Manufacturing I, 1996, Besancon, France
Self-pumped phase-conjugate mirrors (SPPCM) on the base of photorefractive crystals are able to produce the phase- conjugate replica of an incoming wave. That is within certain limits independent of the incoming wave front. One conclusion of that is the possibility of aberration compensation in interferometers. Hence the application of SPPCM offers new possibilities for interferometric tests, especially in fields where classical methods reach their limits. We have built up an phase-shifting interferometer for testing cylindrical and aspherical surfaces incorporating a SPPCM. The optics for generating the wave front adapted to the surface under test is placed in the entrance arm of the interferometer. For testing aspherical surfaces we used a computer-generated hologram. The SPPCM is located in the reference arm. We will discuss the advantages and disadvantages of this new approach and present the results of testing such surfaces.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
A. Krause, A. Krause, Martin Palme, Martin Palme, Gunther Notni, Gunther Notni, } "Interferometers with self-pumped phase-conjugate mirror for testing aspherical and cylindrical surfaces", Proc. SPIE 2782, Optical Inspection and Micromeasurements, (18 September 1996); doi: 10.1117/12.250803; https://doi.org/10.1117/12.250803


Back to Top