A 12-Inch Aperture Folded MTF Analyzer for Infinite Conjugate Testing

The paper describes a compact Modulation Transfer Function Analyzer for long focal length, infinite conjugate optical systems testing. It uses a 12-inch aperture collimating off-axis parabola and two beam-folding mirrors. The analyzer scans the line spread function, produced by the optical system un...

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Bibliographic Details
Published in:Optical Engineering 1975-02, Vol.14 (1), p.140181-140181
Main Author: Woehl, Walter E
Format: Article
Language:English
Online Access:Get full text
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Summary:The paper describes a compact Modulation Transfer Function Analyzer for long focal length, infinite conjugate optical systems testing. It uses a 12-inch aperture collimating off-axis parabola and two beam-folding mirrors. The analyzer scans the line spread function, produced by the optical system under test, with a mask having a sinusoidal transmittance grid which varies as a function of the rotation angle. The transmitted modulated flux generates an AC output rep-resentative of the modulation transfer function, which is plotted on an X-Y recorder. A heavy cross-slide bench as-sembly on a granite base provides the required mechanical rigidity and accuracy.
ISSN:0091-3286
1560-2303
DOI:10.1117/12.7971771