Image intensifiers and method of producing same

Details Image intensifiers and method of producing same Image intensifiers and method of producing same

1988-03-10

1990-03-20

Lindsay, Robert L.

Electric lamp and discharge devices

Photosensitive

Having phosphor screen

65 36, 65 48, 65 61, 250213VT, 313530, 313544, H01J 4018, C03B 2900

Patent

active

RE0331830

ABSTRACT:
A shielded faceplate for use in an image intensifier having a photocathode which comprises an inner core of glass transparent to light to which the photocathode is sensitive and an outer shielding region of glass which absorbs light to which the photocathode is sensitive. The outer shielding region surrounds and is adjacent to the inner core. The inner core has a transverse dimension which decreases along its length, the transverse dimension being smallest at the photocathode surface. The shielded faceplate is manufactured by arranging in a mold to which glass does not bond a first type of glass transparent to light to which the photocathode is sensitive and a second type of glass which absorbs light to which the photocathode is sensitive, heating the glass members so that they fuse to produce a block having an inner core of the first type of glass and an outer region of the second type of glass and removing the block from the mold.

REFERENCES:
patent: 3361548 (1968-01-01), Hamilton et al.
patent: 4065283 (1977-12-01), Asahara et al.
patent: 4108621 (1978-08-01), Asahara et al.
patent: 4265652 (1981-05-01), Goto et al.
patent: 4393322 (1983-07-01), Siegmund
patent: 4406973 (1983-09-01), Stowe
patent: 4475059 (1984-10-01), Sink

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