Method of making light guide member

Details Method of making light guide member Method of making light guide member

1984-04-17

1986-09-16

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Utilizing plasma, electric, electromagnetic, particulate, or...

264162, 264230, 264339, 425DIG48, B29C 5304

Patent

active

046121447

ABSTRACT:
A front end portion of a flat plate-like transparent thermoplastic material is grasped as bent so that the middle section thereof is convex. The thermoplastic material is heated and softened, and the rear end portion of the thermoplastic material is rounded cylindrically in the same direction as the bending direction of the front end portion. The thermoplastic material is then allowed to cool gradually, so that the front end portion has a flat plate-like shape after the gradual cooling. The cylindrical rear end portion is cut and the cut face is planished.

REFERENCES:
patent: 3000057 (1961-09-01), Swedlow et al.
patent: 3497577 (1970-02-01), Wichterle
patent: 3534134 (1970-10-01), Mathews
patent: 3740207 (1973-06-01), Bogrets et al.
patent: 3847721 (1974-11-01), Evans
patent: 3894137 (1975-07-01), Moench
patent: 4208363 (1980-06-01), Yevick

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