Method of manufacturing correction lens for forming phosphor scr

Details Method of manufacturing correction lens for forming phosphor scr Method of manufacturing correction lens for forming phosphor scr

1993-10-21

1995-03-14

Envall, Jr., Roy N.

Boots, shoes, and leggings

354 1, 430 24, 359742, G06F 1546, G03B 4100

Patent

active

053981928

ABSTRACT:
In a method of manufacturing a correction lens for exposing a phosphor screen of a cathode ray tube, an effective surface of the correction lens is divided into a plurality of regions and an orbit of light beam corresponding to an orbit of electron beam is analyzed for each of regions to determine segment surface equation in the same expression form for the respective regions. A final surface equation is derived from the segment surface equations in consideration of an allowable error and the correction lens is formed on the basis of the final surface equation.

REFERENCES:
patent: 3628850 (1971-12-01), Yamazaki et al.
patent: 4052123 (1977-10-01), Yamazaki et al.
patent: 5122819 (1992-06-01), Sato
patent: 5132187 (1992-07-01), Morohashi
E. D. Huber, "Extrapolated least-squares opimization in optical design", Journal of the Optical Society of America A, vol. 2, No. 4, Apr. 1985, pp. 544-554, Woodbury, N.Y.
Yamazaki et al, "A Segmented Lens for Improving Color Television Dot Patterns", Journal of the Society of Motion Picture Television Engineers, vol. 82, No. 3, Mar. 1973, pp. 149-150.

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