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Title: Method for eliminating artifacts in CCD imagers

Abstract

An electronic method for eliminating artifacts in a video camera (10) employing a charge coupled device (CCD) (12) as an image sensor. The method comprises the step of initializing the camera (10) prior to normal read out and includes a first dump cycle period (76) for transferring radiation generated charge into the horizontal register (28) while the decaying image on the phosphor (39) being imaged is being integrated in the photosites, and a second dump cycle period (78), occurring after the phosphor (39) image has decayed, for rapidly dumping unwanted smear charge which has been generated in the vertical registers (32). Image charge is then transferred from the photosites (36) and (38) to the vertical registers (32) and read out in conventional fashion. The inventive method allows the video camera (10) 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 (28) and (32), and are also free from random damage caused by ionization charges which exceed the charge limit capacity ofmore » the photosites (36) and (37).« less

Inventors:
 [1];  [2]
  1. Moraga, CA
  2. Santa Fe, NM
Issue Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
OSTI Identifier:
868338
Patent Number(s):
5121214
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
H - ELECTRICITY H04 - ELECTRIC COMMUNICATION TECHNIQUE H04N - PICTORIAL COMMUNICATION, e.g. TELEVISION
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; eliminating; artifacts; ccd; imagers; electronic; video; camera; 10; employing; charge; coupled; device; 12; image; sensor; comprises; step; initializing; prior; normal; dump; cycle; period; 76; transferring; radiation; generated; horizontal; register; 28; decaying; phosphor; 39; imaged; integrated; photosites; 78; occurring; decayed; rapidly; dumping; unwanted; smear; vertical; registers; 32; transferred; 36; 38; conventional; fashion; inventive; allows; environments; ionizing; content; capture; images; events; duration; outside; visual; wavelength; spectrum; resultant; free; ghost; phenomena; caused; insufficient; opacity; random; damage; ionization; charges; exceed; limit; capacity; 37; radiation generated; charge coupled; coupled device; video camera; method comprises; ionizing radiation; damage caused; inventive method; method allows; method comprise; image sensor; ccd imager; generated charge; electronic method; eliminating artifacts; method allow; /348/257/

Citation Formats

Turko, Bojan T, and Yates, George J. Method for eliminating artifacts in CCD imagers. United States: N. p., 1992. Web.
Turko, Bojan T, & Yates, George J. Method for eliminating artifacts in CCD imagers. United States.
Turko, Bojan T, and Yates, George J. Wed . "Method for eliminating artifacts in CCD imagers". United States. https://www.osti.gov/servlets/purl/868338.
@article{osti_868338,
title = {Method for eliminating artifacts in CCD imagers},
author = {Turko, Bojan T and Yates, George J},
abstractNote = {An electronic method for eliminating artifacts in a video camera (10) employing a charge coupled device (CCD) (12) as an image sensor. The method comprises the step of initializing the camera (10) prior to normal read out and includes a first dump cycle period (76) for transferring radiation generated charge into the horizontal register (28) while the decaying image on the phosphor (39) being imaged is being integrated in the photosites, and a second dump cycle period (78), occurring after the phosphor (39) image has decayed, for rapidly dumping unwanted smear charge which has been generated in the vertical registers (32). Image charge is then transferred from the photosites (36) and (38) to the vertical registers (32) and read out in conventional fashion. The inventive method allows the video camera (10) 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 (28) and (32), and are also free from random damage caused by ionization charges which exceed the charge limit capacity of the photosites (36) and (37).},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {1}
}

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