Method of operating imagers

Details Method of operating imagers Method of operating imagers

1975-05-21

1976-04-27

Willis, Davis L.

Radiant energy

Infrared-to-visible imaging

357 24, H01J 3149

Patent

active

039537331

ABSTRACT:
During the integration time, the voltage applied to the electrodes of a charge coupled device (CCD) imager under which radiation induced charges are to be collected is changed as a function of time. To obtain dark current reduction, a linear ramp may be employed which starts at a relatively low voltage level. The lower average voltage employed to collect charge signals results in lower dark currents (especially at locations where defects are present) but does not appreciably change the number of radiation induced charge carriers which are collected. To obtain increased dynamic range, the voltage may be changed in non-linear fashion, for example, increased in discrete steps or increased by changing the slope of the voltage waveform. Similar techniques may be employed for gamma (.gamma.) correction.

REFERENCES:
patent: 3845295 (1974-10-01), Williams et al.
patent: 3883437 (1975-05-01), Nommedal et al.

Affiliated with

Also associated with

Rating

Method of operating imagers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of operating imagers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of operating imagers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2004693