Correction lens system of an exposure apparatus for a cathode-ra

Details Correction lens system of an exposure apparatus for a cathode-ra Correction lens system of an exposure apparatus for a cathode-ra

1996-12-20

1998-08-04

Sugarman, Scott J.

Optical: systems and elements

Lens

With multipart element

359708, G02B 308

Patent

active

057903204

ABSTRACT:
Disclosed is a correction lens system of an exposure apparatus for a cathode-ray tube which comprises a lens formed with a plurality of block cells joined together and which diffuses and irradiates a light emitted from a light source to an inner surface of a panel, characterized in that the lens system is structured to interrupt ultraviolet rays having a wave length of less than 300 nm, and a method for manufacturing a correction lens of an exposure apparatus for a cathode-ray tube, for diffusing and irradiating a light emitted from a light source to an inner surface of a panel, wherein the method comprises the steps of treating a plurality block cells made of glass such that an upper part of each block cell is inclined at a predetermined angle, polishing the block cells, and adhering the block cells to each other to form a correction lens having a certain shape.

REFERENCES:
patent: 5122819 (1992-06-01), Sato

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