Cathode-ray tube image recording device

Details Cathode-ray tube image recording device Cathode-ray tube image recording device

1980-02-07

1981-07-14

Hix, L. T.

Photocopying

Projection printing and copying cameras

Illumination systems or details

358130, 358244, 358129, 354 76, 346151, G03B 2772

Patent

active

042783470

ABSTRACT:
A cathode-ray tube image recording device for recording images on a photosensitive thermal development recording medium which may have a reduced sensitivity due to time deterioration. An image of a density wedge is exposed and developed then sensed to determine the sensitivity of the recording medium. The sensing operation produces a density identification step number which is used to set one or both of the brightness and light emission time of the cathode-ray tube in accordance with a predetermined characteristic curve or function. A switchable resistor circuit or read-only memory may be used for applying the characteristic function.

REFERENCES:
patent: 3400632 (1968-09-01), Wahli
patent: 3938164 (1976-02-01), Ohnishi et al.

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