Dark current measurement and control for cameras having field-tr

Details Dark current measurement and control for cameras having field-tr Dark current measurement and control for cameras having field-tr

1984-03-28

1985-06-25

Rubinson, Gene Z.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358221, H04N 516

Patent

active

045257434

ABSTRACT:
Output signal samples from a solid-state imager, responsive to dark currents accumulated therein, are applied to slope responsive circuitry for generating a signal which can be used, for example, for field shading correction or imager temperature control. Dark current slope responsive measuring circuitry is particularly advantageous over prior dark current measuring circuitry since it is uneffected by DC offset of the dark current signal which results from imager mask misregistration or carrier diffusion when receiving radiant energy.

REFERENCES:
patent: 3737571 (1973-06-01), Gaebele et al.
patent: 4462047 (1984-07-01), Fujimoto et al.

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