Real time pulse width monitor for Intensified Charge Coupled Device (ICCD) electro-optic shutters

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Description

A method is described or controlling and measuring the pulse width of electrical gate pulses used for optical shuttering of image intensifier. The intensifiers are coupled to high frame rate Charge-Coupled-Devices (CCD) or Focus-Projection Scan (FPS) vidicon TV cameras for readout and telemetry of time resolved image sequences. The shutter duration or gate width of individual shutters is measured in real time and encoded in the video frame corresponding to a given shutter interval. The shutter information is updated once catch video frame by strobing new data with each TV camera vertical sync pulse. This circuitry is used in conjunction ... continued below

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16 p.

Creation Information

Yates, G.J. December 1, 1996.

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Description

A method is described or controlling and measuring the pulse width of electrical gate pulses used for optical shuttering of image intensifier. The intensifiers are coupled to high frame rate Charge-Coupled-Devices (CCD) or Focus-Projection Scan (FPS) vidicon TV cameras for readout and telemetry of time resolved image sequences. The shutter duration or gate width of individual shutters is measured in real time and encoded in the video frame corresponding to a given shutter interval. The shutter information is updated once catch video frame by strobing new data with each TV camera vertical sync pulse. This circuitry is used in conjunction with commercial video insertion/annotation equipment to provide die shutter width information in alpha numeric text form along with the time resolved video image on a frame-by-frame basis. The measurement technique and circuitry involving a combination of high speed digital counters and analog integrators for measurements in the Ins to 1024 ns range are described. The accuracy obtained is compared with measurements obtained using batch speed DSOs. The measured data are provided in 10-bit Binary (Bi) and four decades of Binary Coded Decimal (BCD) and also displayed on four digit seven segment displays. The control circuitry including digital and analog input means for gate width selection are described. The implementation of both measurement and control circuitry into an Intensified Shuttered CCD (ISCCD) radiometric system for recording fast shuttered images at RS-170 to 4 KHz frame rates is presented.

Physical Description

16 p.

Notes

OSTI as DE97001687

Source

  • 22. international congress on high speed photography and photonics, Santa Fe, NM (United States), 28 Oct 1996

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  • Other: DE97001687
  • Report No.: LA-UR--96-3678
  • Report No.: CONF-9610181--4
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 414621
  • Archival Resource Key: ark:/67531/metadc682767

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  • December 1, 1996

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  • July 25, 2015, 2:20 a.m.

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  • May 23, 2016, 1:39 p.m.

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Yates, G.J. Real time pulse width monitor for Intensified Charge Coupled Device (ICCD) electro-optic shutters, article, December 1, 1996; New Mexico. (digital.library.unt.edu/ark:/67531/metadc682767/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.