Novel x-ray image intensifier with catadioptric electron optics

A. G. du Toit

doi:10.1117/12.142020

1 April 1993 Novel x-ray image intensifier with catadioptric electron optics

A. G. du Toit

Proceedings Volume 1982, Photoelectronic Detection and Imaging: Technology and Applications '93; (1993) https://doi.org/10.1117/12.142020
Event: Photoelectronic Detection and Imaging: Technology and Applications '93, 1993, Beijing, China

Abstract

A novel experimental x-ray image intensifier tube with simple catadioptric electron optics is presented and its imaging properties are analyzed theoretically by the use of a few simplified relations. The introduction of catadioptric electron optics in an x-ray image intensifier makes it possible to use a unique output phosphor structure which alleviates the imaging defects suffered by most conventional state-of-the-art x-ray image intensifiers. Several important advantages of the novel intensifier are exemplified. A brief theoretical analysis of the x-ray conversion factor, signal-to-noise ratio, modulation transfer characteristic and other imaging properties of the new tube is given to indicate the improved performance that can be realized by the new intensifier. Preliminary results obtained from an experimental tube with a diameter of 18 mm are presented to verify the theoretical analysis and predict the performance of tubes with larger diameters. The characteristics of the x-ray images of test objects recorded with the experimental tube coupled with a relay lens to a CCD camera and video frame grabber are displayed and analyzed.

Citation Download Citation

A. G. du Toit "Novel x-ray image intensifier with catadioptric electron optics", Proc. SPIE 1982, Photoelectronic Detection and Imaging: Technology and Applications '93, (1 April 1993); https://doi.org/10.1117/12.142020

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