1960•Journal of Scientific InstrumentsOpen access
Cyclic shearing interferometer
P. Hariharan, Debashis Sen
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Abstract
A wavefront shearing interferometer is described which can be conveniently used for routine tests of optical systems with relative apertures of f/6 or less. The necessity of equalizing the two optical paths has been eliminated in this instrument, making it extremely easy to adjust and handle. At the same time, the shear can be continuously varied, so that zonal errors can be easily identified.
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