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Title: Method for eliminating artifacts in CCD imagers

Abstract

An electronic method for eliminating artifacts in a video camera employing a charge coupled device (CCD) as an image sensor is disclosed. The method comprises the step of initializing the camera prior to normal read out and includes a first dump cycle period for transferring radiation generated charge into the horizontal register while the decaying image on the phosphor being imaged is being integrated in the photosites, and a second dump cycle period, occurring after the phosphor image has decayed, for rapidly dumping unwanted smear charge which has been generated in the vertical registers. Image charge is then transferred from the photosites and to the vertical registers and read out in conventional fashion. The inventive method allows the video camera to be used in environments having high ionizing radiation content, and to capture images of events of very short duration and occurring either within or outside the normal visual wavelength spectrum. Resultant images are free from ghost, smear and smear phenomena caused by insufficient opacity of the registers and, and are also free from random damage caused by ionization charges which exceed the charge limit capacity of the photosites. 3 figs.

Inventors:
;
Issue Date:
OSTI Identifier:
7273278
Patent Number(s):
5121214 A
Application Number:
PPN: US 7-545732
Assignee:
Dept. of Energy, Washington, DC (United States) PTO; EDB-94-083272
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Resource Relation:
Patent File Date: 29 Jun 1990
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; TELEVISION CAMERAS; DESIGN; CHARGE-COUPLED DEVICES; READOUT SYSTEMS; REMOTE VIEWING EQUIPMENT; CAMERAS; EQUIPMENT; SEMICONDUCTOR DEVICES; 440600* - Optical Instrumentation- (1990-)

Citation Formats

Turko, B.T., and Yates, G.J. Method for eliminating artifacts in CCD imagers. United States: N. p., 1992. Web.
Turko, B.T., & Yates, G.J. Method for eliminating artifacts in CCD imagers. United States.
Turko, B.T., and Yates, G.J. Tue . "Method for eliminating artifacts in CCD imagers". United States.
@article{osti_7273278,
title = {Method for eliminating artifacts in CCD imagers},
author = {Turko, B.T. and Yates, G.J.},
abstractNote = {An electronic method for eliminating artifacts in a video camera employing a charge coupled device (CCD) as an image sensor is disclosed. The method comprises the step of initializing the camera prior to normal read out and includes a first dump cycle period for transferring radiation generated charge into the horizontal register while the decaying image on the phosphor being imaged is being integrated in the photosites, and a second dump cycle period, occurring after the phosphor image has decayed, for rapidly dumping unwanted smear charge which has been generated in the vertical registers. Image charge is then transferred from the photosites and to the vertical registers and read out in conventional fashion. The inventive method allows the video camera to be used in environments having high ionizing radiation content, and to capture images of events of very short duration and occurring either within or outside the normal visual wavelength spectrum. Resultant images are free from ghost, smear and smear phenomena caused by insufficient opacity of the registers and, and are also free from random damage caused by ionization charges which exceed the charge limit capacity of the photosites. 3 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {6}
}