Direct determination of modulation transfer function by moire de

Details Direct determination of modulation transfer function by moire de Direct determination of modulation transfer function by moire de

1984-07-03

1987-01-27

Rosenberger, R. A.

Optics: measuring and testing

Lens or reflective image former testing

For optical transfer function

G01M 1100

Patent

active

046391320

ABSTRACT:
A system and method for determining modulation transfer function (MTF) of an optical element or system employs a moire deflectometer. A selected central portion of monochromatic light is directed to the first grating of the moire deflectometer through or from the optical system, resulting in a moire pattern in which the contrast along an axis incident to the moire fringes is indicative of the MTF of the optical system for a particular spatial frequency, which is dependent on the spacing between the gratings of the moire deflectometer.

REFERENCES:
patent: 3771879 (1973-11-01), Chambu et al.
patent: 4459027 (1984-07-01), Kafri et al.
Goodman et al. "High Spatial Frequency MTF Measurement Scheme" IBM Technical Disclosure Bulletin, vol. 25, No. 10, (Mar. 1983), pp. 5056-5057.

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