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10 February 2005 Optical test of aspheric elements using instantaneous wedge plate phase shifting lateral shearing interferometer
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Abstract
In the optical testing of aspheric lenses, the phase shifting lateral shearing interferometer has attracted considerable attention because of its advantage in alignment work. And many phase shifting lateral shearing interferometers were developed. But all of them are time delayed methods which have the time lag between the measurements. When air turbulence and vibration is present, this time lag can be onerous error sources. If we measure all the required interferograms for the phase shifting method at the same time, there should be no time leg. We present a simple instantaneous phase shifting lateral shearing interferometer using a wedge plate and two identical transmission gratings and reconstruct the wavefront error of measured instantaneous phase shifting lateral shearing interferograms.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jae-Bong Song, Yoon-Woo Lee, In-Won Lee, and Jong Ung Lee "Optical test of aspheric elements using instantaneous wedge plate phase shifting lateral shearing interferometer", Proc. SPIE 5638, Optical Design and Testing II, (10 February 2005); https://doi.org/10.1117/12.576622
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