Exposing filter with varying width lines for manufacturing...

Details Exposing filter with varying width lines for manufacturing... Exposing filter with varying width lines for manufacturing...

G - Physics

03

B

88/121, 95/0.8

G03B 41/00 (2006.01) G03F 7/20 (2006.01) H01J 9/227 (2006.01)

Patent

CA 1078239

ABSTRACT An exposure device for the manufacture of display screens of colour television display tubes. The device comprises a discontinuous filter which consists of a transparent plate which is provided with a large number of parallel opaque linear regions. The transmission of the filter is varied by varying the width of the linear regions.

273549

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