Dual testing of a large-aperture optical system

Details Dual testing of a large-aperture optical system Dual testing of a large-aperture optical system

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002spie.4778..227s&link_type=abstract

Proc. SPIE Vol. 4778, p. 227-236, Interferometry XI: Applications, Wolfgang Osten; Ed.

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Scientific paper

A method for measuring the wave front errors and the modulation transfer function (MTF) of the large aperture optics is presented. The large aperture Fizeau interferometer with long optical path difference by using a (phi) 400 mm off-axis parabolic mirror is made. The MTF is measured at the wavelength of the interferometer by changing the laser into the partially incoherent light. A bidirectional shearing interferometer is used for collimation testing. The test results of a (phi) 300 mm Cassegrain type satellite telescope made in Korea are presented.

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