Optical: systems and elements – Diffusing of incident light
Patent
1991-09-06
1993-01-05
Henry, Jon W.
Optical: systems and elements
Diffusing of incident light
359619, 354200, G02B 502, G02B 2740
Patent
active
051776375
ABSTRACT:
In a focusing screen having a large number of microlenses regularly arranged thereon, heights of microlenses are n different values. The microlenses having the same height are cyclically arranged. In another aspect, the heights of the microlenses in a similar focusing screen are randomly distributed over ranges centered on n central values, and the microlenses having the same central value are cyclically arranged. In still another aspect, in a method of manufacturing a focusing screen having micropatterned projections by a so-called proximity exposure method, dimensions of the micropatterns of the mask vary centered on the n different values, and the micropatterns having the same central values are cyclically arranged.
REFERENCES:
patent: 4421398 (1983-12-01), Suzuki et al.
patent: 4427265 (1984-01-01), Suzuki et al.
patent: 4519686 (1985-05-01), Seki et al.
patent: 4871242 (1989-10-01), Sousa et al.
patent: 4946252 (1990-08-01), Sugawara
patent: 4982214 (1991-01-01), Matsui
patent: 5074649 (1991-12-01), Hamanaka
patent: 5081545 (1992-01-01), Sugawara et al.
patent: 5089835 (1992-02-01), Kitagishi
"Light Diffuser with Controlled Divergence", IBM Tech. Dis. Bull., vol. 29, No. 1, Jun. 1986 (359/619).
Henry Jon W.
Nikon Corporation
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