PICTURE EXPOSURE DEVICE

Japanese Patent JP2988767

B2

PURPOSE: To obtain a high picture quality picture in which no uneven density is caused onto a gradation recording material with excellent color balance without any deterioration in picture quality and fluctuation in the gradation characteristic by providing a specific picture element clock generating circuit, a specific integration device, a specific comparator and a specific temperature control means to the exposure respectively.
CONSTITUTION: A temperature controller 62 is used to keep the temperature of circuit components susceptible to the effect of temperature fluctuation such as those for at least a picture element clock generating circuit (frequency divider) 52, an integration device 56 and a transfer circuit (driver) 54 for various signals, especially for those of a transfer circuit 64 most susceptible to temperature fluctuation among circuit components of a modulation means 32 modulating a light beam at a prescribed narrow band wavelength into the exposure intensity in response to a digital picture signal in picture element synchronization a constant temperature. Thus, the temperature fluctuation of the circuit components is eliminated, a modulation signal in response to a picture signal accurately is stably outputted without causing deformation or deviation in various pulse signals, picture element clock pulses, triangle waves and modulation signals in the modulation means 32.

OKINO YOSHIHARU

JP838592A

December 13, 1999

January 21, 1992

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FUJI SHASHIN FUIRUMU KK

G02B26/10; G03B27/73; G03F7/20; G03G15/04; G03G15/043; H04N1/04; H04N1/113; (IPC1-7): H04N1/113; G02B26/10; G03B27/73; G03G15/04; G03G15/043

JP2110478A
JP3169571A
JP6210561U

Watanabe Noboru Minoru

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