Image intensifier tube

Details Image intensifier tube Image intensifier tube

1995-02-08

1996-12-24

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Image pickup tube

313386, 313530, 313527, 313541, 313543, H01J 2945

Patent

active

055876218

ABSTRACT:
In order to increase the sensitivity of an image intensifier tube, the efficiency with which an electron image is formed from radiation of a first wavelength is increased. Radiation of the first wavelength is converted into radiation of a second wavelength by means of a conversion screen provided with a scintillation layer, and radiation of the second wavelength releases electrons from a photocathode which is sensitive to the second wavelength. Loss of radiation of a second wavelength, incurred because a part of this radiation does not reach the photocathode, is reduced. Radiation of the second wavelength which is not emitted in the direction of the photocathode is recaptured by providing the conversion screen with a metallic reflecting intermediate layer.

REFERENCES:
patent: 2525832 (1950-10-01), Sheldon
patent: 3800194 (1974-03-01), Maruyama et al.
patent: 3904911 (1975-09-01), Welsch
patent: 4002938 (1977-01-01), Pehe
patent: 4626885 (1986-12-01), Ishioka et al.
patent: 4816715 (1989-03-01), Unnai et al.
patent: 4952839 (1990-08-01), Tanioka et al.

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