Light-pulse-induced background in image intensifiers with MCPs

Boris Efimovich Dashevsky

doi:10.1117/12.44262

1 June 1991 Light-pulse-induced background in image intensifiers with MCPs

Boris Efimovich Dashevsky

Proceedings Volume 1449, Electron Image Tubes and Image Intensifiers II; (1991) https://doi.org/10.1117/12.44262
Event: Electronic Imaging '91, 1991, San Jose, CA, United States

Abstract

Image intensifier tubes with MCPs are nowadays increasingly employed in many fields of science and technology for the reception of alternating short light pulses of relatively large amplitudes. In the process of their operation, an additional background induced by an input light signal that has partially passed through the photocathode occurs. It can be observed on the phosphor screen in the form of dispersed scintillations uniformly distributed over the whole field of view. Studies have been carried out using an MCP-equipped intensifier of an invertor type. Characteristics of tubes fabricated using a standard and a modified technology are compared. The experimental part of the work involves photographing a bar test pattern area on the tube's screen during photocathode exposure to short light pulses as well as measurement of the modulation-transfer function. Photographs showing images of the optical test pattern and calculated modulation-transfer functions of both tube types are provided. The reported results clearly indicate that the proposed technological and structural modifications enable about a two-fold improvement of the image contrast at high frequencies.

Citation Download Citation

Boris Efimovich Dashevsky "Light-pulse-induced background in image intensifiers with MCPs", Proc. SPIE 1449, Electron Image Tubes and Image Intensifiers II, (1 June 1991); https://doi.org/10.1117/12.44262

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