An Electron-Lens For Opaque Photocathodes

C. B. Johnson; Kenneth L. Hallam

doi:10.1117/12.953597

16 April 1973 An Electron-Lens For Opaque Photocathodes

C. B. Johnson, Kenneth L. Hallam

Proceedings Volume 0032, Developments in Electronic Imaging Techniques II; (1973) https://doi.org/10.1117/12.953597
Event: Developments in Electronic Imaging Techniques, 1972, San Mateo, United States

Abstract

For many years image tubes have been made which use semitransparent photocathodes to conveniently separate the optical and electro-optical functions. It is now possible to employ opaque photocathodes in image tubes having a special electromagnetic lens, without the use of special internal image forming optical lenses or mirrors. The design of this special electron-lens and measurements of some of its characteristics are discussed in succeeding sections.

Citation Download Citation

C. B. Johnson and Kenneth L. Hallam "An Electron-Lens For Opaque Photocathodes", Proc. SPIE 0032, Developments in Electronic Imaging Techniques II, (16 April 1973); https://doi.org/10.1117/12.953597

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