Optical pickup apparatus and method of manufacture thereof, opti

Details Optical pickup apparatus and method of manufacture thereof, opti Optical pickup apparatus and method of manufacture thereof, opti

1999-04-13

2000-06-13

Epps, Georgia

Optical: systems and elements

Lens

With support

369244, 425542, G02B 702

Patent

active

060756594

ABSTRACT:
An injection molding die comprising a lower die and an upper die for manufacturing an objective lens drive unit, comprises a plurality of gates formed on the lower die in position perpendiculars to the direction of opening and closing the lower die and the upper die for allowing resin to flow into the cavity formed of the lower die and the upper die and a plurality of runners each with an end thereof connected to the corresponding gate and the other end thereof formed on the upper die, wherein each of the runners including the end-to-end portion thereof is formed inclined toward the upper die.

REFERENCES:
patent: 5517362 (1996-05-01), Kasuga et al.
patent: 5521762 (1996-05-01), Tomiyama et al.
patent: 5724337 (1998-03-01), Kawano et al.

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