Method and apparatus for selectively positioning spectral filter

Details Method and apparatus for selectively positioning spectral filter Method and apparatus for selectively positioning spectral filter

1980-06-03

1982-02-16

Hartary, Joseph W.

Optics: measuring and testing

Range or remote distance finding

With photodetection

354 27, 354 59, 356225, G03B 714

Patent

active

043156754

ABSTRACT:
Method and apparatus using shutter blade and photocell lens arrangement for automatically controlling exposure of a photographic film by evaluating selected spectral scene light frequencies during certain ambient light portions of an exposure interval and evaluating additional spectral frequencies during a flash portion of the interval.

REFERENCES:
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patent: 3468228 (1969-09-01), Rogers
patent: 3500730 (1970-03-01), Matsubara et al.
patent: 3672281 (1972-06-01), Land
patent: 3896458 (1975-07-01), Johnson et al.
patent: 3903413 (1975-09-01), Manning
patent: 3942183 (1976-03-01), Whiteside
patent: 4040070 (1977-08-01), Hochreiter
patent: 4104653 (1978-08-01), Johnson et al.
Patent application Ser. No. 110,811 filed Jan. 10, 1980, Apparatus for Varying the Spectral Filter Over the Photocell as a Function of Blade Position, Milton Dietz.
Patent application Ser. No. 108,219 filed Dec. 31, 1979, Method and Apparatus for Selective Positioning of Spectral Filter During Exposure Control, Bruce K. Johnson.
Patent application Ser. No. 74,993 filed Sep. 13, 1929.
Novelty and Infringement on Arrangement for Varying IR Filter Over the Photocell, Law Office of Sandler & Greenblum, Dec. 17, 1979.
Infringement Study XL Shutter Design, Bacon & Thomas, Sep. 8, 1977.
Novelty and Infringement Search on Arrangement for Selective Presentation of IR Filter during Exposure Control, Sandler & Greenblum, May 30, 1980.
Infringement Search on Exposure Control System Employing Split Spectral Filters, Sandler & Greenblum, May 30, 1980.

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