Black glass shield and method for absorbing stray light for imag

Details Black glass shield and method for absorbing stray light for imag Black glass shield and method for absorbing stray light for imag

1983-02-16

1983-09-27

Smith, Alfred E.

Electric lamp and discharge devices

Photosensitive

Having photocathode on tube wall

313371, 313532, 313117, H01J 4000

Patent

active

044069731

ABSTRACT:
A shielded clear glass cathode substrate (44) is provided for use in an image intensifier tube of the type utilizing a clear glass cathode substrate (46). A black glass cathode substrate shield (48) is coextensive with the entire longitudinal surface of the clear glass cathode substrate (46). The black glass forming the black glass cathode substrate shield (48) has an index of refraction that is greater than the index of refraction of the clear glass utilized in the clear glass cathode substrate (46). A method is provided for producing a shielded glass cathode substrate from a mass of clear glass (52).

REFERENCES:
patent: 3070720 (1962-12-01), Turk
patent: 4157484 (1979-06-01), Stowe et al.
patent: 4240694 (1980-12-01), Pan
patent: 4310778 (1982-01-01), Horseling

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