Variable-velocity film exposing and developing apparatus

Details Variable-velocity film exposing and developing apparatus Variable-velocity film exposing and developing apparatus

1980-08-19

1982-08-10

Wolff, John H.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

354 66, H04N 586

Patent

active

043440886

ABSTRACT:
A photographic film recorder includes film-exposing apparatus having a laser light source for exposing the film, and a photographic film-developing apparatus. A film transport means transports the film at the same velocity through both the exposing apparatus and the developing apparatus, under control of a received film velocity signal. The time period each element of the film is in the developer varies inversely with film velocity. A plurality of transfer function look-up tables are provided for translating a received video density signal to a corresponding exposure signal for controlling the laser light source. Means responsive to the film velocity signal selects for use a transfer function look-up table which is appropriate for the time period each element of the film is in the developer.

REFERENCES:
patent: 3809806 (1974-05-01), Walker et al.
patent: 4115817 (1978-09-01), Suzuki et al.
patent: 4278338 (1981-07-01), Baker et al.

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