Abstract
A new CGH (computer generated hologram) common path interferometer, which can be used for testing an aspherical mirror with large aperture, is proposed. This interferometer does not have a circle of least confusion, and a spatial filter can be used effectively to stop extraneous lights so that interferograms with good contrast can be obtained. The phase shifting technique can be easily applied to the interferometer. The method of designing and making the CGH zone-plate is described.
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Guan, H., Yamaguchi, M., Ohyama, N. et al. Zone Plate Common Path Interferometer for Testing Aspherical Mirror with Large Aperture. OPT REV 2, 55–58 (1995). https://doi.org/10.1007/s10043-995-0055-5
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DOI: https://doi.org/10.1007/s10043-995-0055-5