Developer solution replenishment control system for a digital im

Details Developer solution replenishment control system for a digital im Developer solution replenishment control system for a digital im

1991-02-19

1992-09-08

Hix, L. T.

354324, G03D 1300

Patent

active

051462575

ABSTRACT:
A developer replenishment control system for a continuous tone digital imaging system of the type including a laser imager for exposing pixels on sheets of photographic film as a function of digital exposure values representative of an image and a film processor with a developer replenishment mechanism for developing the imaged film. The replenishment control system includes lookup table memory and processing circuitry. Developer replenishment data in the form of an array of digital exposure values and corresponding incremental developed emulsion areal density values representative of the amount of developer required to develop the associated exposed film pixels is stored in the lookup table memory. The processing circuitry accesses the lookup table memory as a function of the digital exposure values to determine the associated incremental developed emulsion density values. The incremental developed emulsion density values for each sheet of imaged film are summed to generate replenishment control signals. The replenishment mechanism of the film processor includes a pump and a controller. The controller actuates the pump as a function of the replenishment control signals to replenish developer used during the development of each sheet of film.

REFERENCES:
patent: 4310234 (1982-01-01), Sakamoto et al.
patent: 4603956 (1986-08-01), Baker

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