Large-format imaging system

Stuart A. Baker; Lawrence J. Castellano; Paul A. Flores; Brent C. Frogget; Wilfred Lewis; Paul T. Nedrow; John S. Rohrer; Nicholas S. P. King

doi:10.1117/12.273383

28 May 1997 Large-format imaging system

Stuart A. Baker, Lawrence J. Castellano, Paul A. Flores, Brent C. Frogget, Wilfred Lewis, Paul T. Nedrow, John S. Rohrer, Nicholas S. P. King

Author Affiliations +

Proceedings Volume 2869, 22nd International Congress on High-Speed Photography and Photonics; (1997) https://doi.org/10.1117/12.273383
Event: 22nd International Congress on High-Speed Photography and Photonics, 1996, Santa Fe, NM, United States

Abstract

Bechtel Nevada, in collaboration with Los Alamos National Laboratory, has designed a radiographic imaging system that takes advantage of large format electron optical elements to produce a highly sensitive system for large diameter radiographic fluxes. Using specially designed fast lenses, the system is able to observe scintillator screens as large as 300 mm in diameter.A gated microchannel plate intensifier allows the system to be synchronized to pulsed gamma, proton and neutron sources of radiation to help reduce background noise levels. The entire system is deployed in a transportable housing with sealed heat exchanger and electrical patch panel that is designed to be lighttight so that the electron optics can be operated at extremely high gain. External controls allow manipulation of system gain, gate width and focus. The resolution is about 1 to 2 line pairs per millimeter at the radiation-to-light converter, and the f-number of the optical system is f/1. The image is digitized from a fiber-optically coupled 1024 X 1024 cooled charge-coupled device array. The system will have interchangeable components so that system performance can be optimized to meet specific recording requirements. The major trade-off is between field of view and resolution.

Citation Download Citation

Stuart A. Baker, Lawrence J. Castellano, Paul A. Flores, Brent C. Frogget, Wilfred Lewis, Paul T. Nedrow, John S. Rohrer, and Nicholas S. P. King "Large-format imaging system", Proc. SPIE 2869, 22nd International Congress on High-Speed Photography and Photonics, (28 May 1997); https://doi.org/10.1117/12.273383

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KEYWORDS

Imaging systems

Microchannel plates

Charge-coupled devices

Cameras

CCD cameras

Control systems

Lens design

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