Hot cathode fluorescent tube illumination system

Details Hot cathode fluorescent tube illumination system Hot cathode fluorescent tube illumination system

1984-03-22

1987-04-28

DeMeo, Palmer C.

Photocopying

Projection printing and copying cameras

Illumination systems or details

313496, 313110, 362223, H01J 6302, G03B 2754

Patent

active

046609679

ABSTRACT:
A slit light emitting type hot cathode fluorescent tube illumination system including at least one substrate, a plurality of strip anodes, a plurality of fluorescent substance layers each superposed on one of the anodes, and hot cathode filaments located above top surfaces of the fluorescent substance layers for emitting thermoelectrons exciting the fluorescent substance layers to emit light for illuminating an original by slit illumination. A cylindrical lens is located in a path of the light emitted by the fluorescent substance layers in such a manner that the generating line of the cylindrical lens is parallel to the length of the fluorescent substance layers. The substrate and cylindrical lens cooperate with each other to provide an illumination system in tubular form, with the aid of a side plate when necessary.

REFERENCES:
patent: 4348105 (1982-09-01), Caprari
patent: 4387322 (1983-06-01), Nixon

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