Patent
1981-08-07
1984-11-13
Corbin, John K.
3541951, G02B 900, G03B 300
Patent
active
044822200
ABSTRACT:
Device for the corrective compensation of the altering aperture error formed by varying the aperture stop in reproducing systems of image recording apparatus, for instance photographic cameras.
The reproducing system (2,3,4) comprises at least one optical member (3,22) affecting the aperture error and displaceably supported along the optical axis (23) of the reproducing system (2,3,4) for varying its relative position with respect to the other components (2,4) of the reproducing system. Setting means (17,28) are further provided which as a function of the variation in the aperture stop displace the optical member (3,22) by an extent corresponding to a corrective compensating nominal value along the optical axis (23) of the reproducing system (2,3,4).
REFERENCES:
patent: 3918797 (1975-11-01), Takano
patent: 3918798 (1975-11-01), Takano
patent: 4064520 (1977-12-01), Freudenschuss et al.
patent: 4154517 (1979-05-01), Tamura et al.
patent: 4159864 (1979-07-01), Yasukuni et al.
patent: 4168116 (1979-09-01), Goldberg
patent: 4299453 (1981-11-01), Momiyama et al.
patent: 4367927 (1983-01-01), Fujii
Goldberg, N.; "What ISFO Is and How It Works"; Popular Photography; vol. 84, No. 4; Apr. 1979, pp. 88, 89, 232 & 234.
Corbin John K.
Ernst Leitz Wetzlar GmbH
Sugarman Scott J.
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