Plate lens and a method for manufacturing the same

Details Plate lens and a method for manufacturing the same Plate lens and a method for manufacturing the same

1983-01-31

1985-04-09

Arnold, Bruce Y.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

350413, 350416, 350417, 427163, 427166, 430321, G02B 2700, B05D 506

Patent

active

045098247

ABSTRACT:
A plate lens comprising a transparent base having two flat surfaces and having a plano-convex lens portion which is formed integrally with the transparent base, which has a refractive index greater than that of the transparent base and which has a substantially semicircular or circular section in a direction perpendicular to the flat surfaces of the transparent base. The plate lens has a light-shielding layer on one surface of the transparent base, as needed. The light-shielding layer covers one surface of the transparent base such that a transparent portion may be formed in the vicinity of a position opposing the central point or line of the plano-convex lens portion. The plate lens provides a clear and bright image and is therefore applicable to faceplates for various types of display devices, CRTs and the like. The plate lens may be mass-produced at low cost.

REFERENCES:
patent: 3879110 (1975-04-01), Furukawa
patent: 4296143 (1981-10-01), Franken et al.
patent: 4384038 (1983-05-01), Khoe et al.

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