Method for preparing supplemental filter for lighthouse

Details Method for preparing supplemental filter for lighthouse Method for preparing supplemental filter for lighthouse

1973-08-20

1976-04-27

Kimlin, Edward C.

Gas separation: apparatus

Electric field separation apparatus

Electrode cleaner, apparatus part flusher, discharger, or...

96 361, G03C 500

Patent

active

039532097

ABSTRACT:
A method for preparing a supplemental intensity-correction filter for an exposure lighthouse that is used to print viewing-screen structures for cathode-ray tubes. The method involves printing a screen structure without a supplemental filter, calculating how incremental areas of the light field must be modified at the surface of an optical element of the lighthouse to produce the desired screen structure, and then printing a supplemental filter on that surface having the transmission characteristics necessary to modify the light field as required.

REFERENCES:
patent: 2817276 (1957-12-01), Epstein et al.
patent: 3282691 (1966-11-01), Morrell et al.
patent: 3420150 (1969-01-01), Kaplan
patent: 3582326 (1971-06-01), Smithgall
patent: 3592112 (1971-07-01), Frey
patent: 3636836 (1972-01-01), Maddox et al.
patent: 3676129 (1972-07-01), Ragland
patent: 3784282 (1974-01-01), Yamazaki et al.
patent: 3788200 (1972-03-01), Yamazaki et al.

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