Users of the ITT F4113 proximity-focused image intensifier tube have generally been unable to obtain its specified resolution when using it to amplify streak tube images. As well as reduced high-frequency resolution, some output light can be detected at distances as great as a few millimeters from the input image. This long-range light spreading is called veiling glare. In this paper we present measurements and propose the cause of the F4113's veiling glare. The most probable cause is electron scattering at the front surface of the microchannel plate, with some contribution due to electron scattering at the phosphor. The cause of reduced resolution at higher spatial frequencies is also discussed. This is most likely due to the combined effects of phosphor thickness, photographic film thickness and the high numerical aperture of the fiber optics. Finally, some improvements have recently been made to the F4113. These are described and possible additional improvements are suggested.

Date Published: 1 February 1989
PDF: 7 pages
Proc. SPIE 0981, High Speed Photography, Videography, and Photonics VI, (1 February 1989); doi: 10.1117/12.948667

Published in SPIE Proceedings Vol. 0981:
High Speed Photography, Videography, and Photonics VI
Gary L. Stradling, Editor(s)