Automatic reference background monitoring network for a film pro

Optics: measuring and testing – Range or remote distance finding – With photodetection

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354324, 356444, G03D 1300

Patent

active

043458319

ABSTRACT:
A film processor having film transport rollers driven by a drive motor, a sensor for generating a signal representative of roller transport speed and a film density detector arrangement that includes a photodetector responsive to the intensity of a light source for generating a reference background level signal against which processed film is compared is characterized by a monitoring arrangement which periodically samples the photodetector output signal and adjusts a reference background level signal in accordance with fluctuations in the output of the scanner arrangement. To prevent the system from reacting to momentary perturbations in background level a moving weighted averaging technique is employed. The rate at which the reference background level signal is sampled is determined by the transport roller speed.

REFERENCES:
patent: Re30123 (1979-10-01), Crowell et al.
patent: B489328 (1976-01-01), Takita
patent: 2548573 (1951-04-01), Wampole et al.
patent: 3462221 (1969-08-01), Tajima et al.
patent: 3539085 (1970-11-01), Anderson
patent: 3647461 (1972-03-01), Surash et al.
patent: 3647462 (1972-03-01), Surash et al.
patent: 3696728 (1972-10-01), Hope
patent: 3699869 (1972-10-01), Jensen
patent: 3752052 (1973-08-01), Hope et al.
patent: 3774521 (1973-11-01), Beck
patent: 3787689 (1974-01-01), Fidelman
patent: 3828172 (1974-08-01), Schickler
patent: 3843914 (1974-10-01), Carlson et al.
patent: 3930201 (1975-12-01), Ackermann et al.
patent: 4046571 (1977-09-01), Mertz
patent: 4057818 (1977-11-01), Gaskell et al.
patent: 4104670 (1978-08-01), Charnley
patent: 4135082 (1979-01-01), Borders, Jr. et al.
patent: 4173441 (1979-11-01), Wolf
patent: 4174169 (1979-11-01), Melander et al.

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