Foucault knife-edge test for quantitatively determining a wavefr

Details Foucault knife-edge test for quantitatively determining a wavefr Foucault knife-edge test for quantitatively determining a wavefr

1990-03-28

1990-12-25

Evans, F. L.

Optics: measuring and testing

Lens or reflective image former testing

For optical transfer function

G01B 900

Patent

active

049798197

ABSTRACT:
The historical Foucault knife-edge test enables one to qualitatively ascertain an optical imaging device's characteristics, for example, whether or not it is a source of optical aberrations. The novel method of the present invention, in sharp contrast, complements the historical Foucault knife-edge test, by expanding the test so as to develop a quantitative interpretation of the imaging device's characteristics. In particular, the novel method is suitable for determining a wavefront aberration over an entire surface of the imaging device.

REFERENCES:
patent: 4272190 (1981-06-01), Shapiro

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