Radiant energy – Invisible radiant energy responsive electric signalling – Signalling means controls incident radiation
Patent
1985-08-27
1987-12-01
Howell, Janice A.
Radiant energy
Invisible radiant energy responsive electric signalling
Signalling means controls incident radiation
250205, 372 34, G03B 2772, G05D 2502
Patent
active
047106310
ABSTRACT:
An image forming method for exposing a light-sensitive material with a semiconductor light source whereby temperature-dependent variations in the radiation intensity and spectral characteristics of the light source are fully compensated for so as to maintain constant exposure conditions. For this purpose, correction coefficients for ambient temperature dependent variations in the radiation intensity and spectral characteristics of the semiconductor light source are stored in a memory as tabulated data. In response to the measured ambient temperature, a correction coefficient is read from the memory and applied to compensate for any variations in the radiation intensity and spectral characteristics of the semiconductor light source. Also, the correction can be effected in accordance with the measured temperature of the light source, that measurement being performed by detecting a change in the forward bias supplied to the semiconductor light source.
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Aotsuka Yasuo
Konishi Masahiro
Takahashi Koji
Fuji Photo Film Co. , Ltd.
Hannaher Constantine
Howell Janice A.
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