Method and apparatus for replicating light shaping surface struc

Details Method and apparatus for replicating light shaping surface struc Method and apparatus for replicating light shaping surface struc

1998-08-24

2000-08-29

Vargot, Mathieu D.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Light polarizing article or holographic article

264 16, 264 17, 264284, 264293, 264 138, 4251744, 425363, 425385, B29D 1100, B29C 5904

Patent

active

061104019

ABSTRACT:
A simple, fast, and reliable method and apparatus are provided for replicating a light shaping surface structure on a laminated surface of a relatively rigid substrate. More specifically, after the substrate is mounted on a table and a layer of epoxy is deposited between the substrate and a submaster to produce a layered structure, the layered structure is automatically compressed in a nip formed between the table and an outer surface of a rotating impression roller, thereby replicating the surface structure in the epoxy layer. The epoxy is then cured, and the submaster is separated from the substrate to leave a laminated structure having the light shaping surface structure on a surface thereof. Preferably, the submaster is wrapped around the impression roller, and the impression roller is rotated while the table is reciprocated linearly to compress the layered structure in the nip. In order to prevent slippage between the submaster and the substrate, the rotational speed of the impression roller is matched to the translational speed of the table during the compressing operation--preferably by using the submaster as a drive belt to drive the roller to rotate upon table movement. The replicator preferably also automatically cures the epoxy after the compressing operation and then automatically separates the submaster from the substrate.

REFERENCES:
patent: 2694226 (1954-11-01), Luboshez
patent: 5124089 (1992-06-01), Ohkoshi et al.
patent: 5183599 (1993-02-01), Lu
patent: 5312569 (1994-05-01), Mezei
patent: 5312570 (1994-05-01), Halter
patent: 5874132 (1999-01-01), Jung

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