Light-collimating film

Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness

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428 68, 428120, 428141, 428142, 428156, 428161, 428163, 428168, 428172, 428173, 428201, 428203, 428204, 428206, 428207, 428409, 428212, 4289088, 428913, 351 47, 351165, 351166, 359321, 359614, 359641, 359738, B32B 328

Patent

active

052041603

ABSTRACT:
A plastic film has a series of grooves the interiors of which are rendered light absorbing to form a light-collimating film.

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patent: 4621898 (1986-11-01), Cohen

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