Computerized instrument measures effective focal lengths to 0.01 percent accuracy. Laser interferometers measure mirror angle and stage coordinate y in instrument for accurate measurment of focal properties of optical systems. Operates under computer control to measure effective focal length, focal surface shape, modulation transfer function, and astigmatism.
Precise Measurement of Effective Focal Length
NASA Tech Briefs ; 7 , 3
1983-08-01
Miscellaneous
No indication
English
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