Modified Foucault for testing an imaging device in terms of the

Details Modified Foucault for testing an imaging device in terms of the Modified Foucault for testing an imaging device in terms of the

1990-05-31

1991-04-02

Evans, F. L.

Optics: measuring and testing

Lens or reflective image former testing

For optical transfer function

350266, G01B 900

Patent

active

050043374

ABSTRACT:
A novel method for quantitatively assessing an imaging device in terms of the classical encircled energy test. The method of the present invention provides this capability by a novel adaptation of the Foucault knife-edge test. In this way, the inherent advantages of the traditional qualitative Foucault knife-edge test are preserved. At the same time, the novel method provides a quick and efficient pass/fail test for quantitatively ascertaining exactly what percentage of energy may be sharply imaged by an imaging device.

REFERENCES:
patent: 4160598 (1979-07-01), Firester et al.
patent: 4272190 (1981-06-01), Shapiro
patent: 4402602 (1983-09-01), Kuppenheimer, Jr.
patent: 4487502 (1984-12-01), Fantozzi et al.

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