Thermoplastic lens barrel for holding assembly of lens elements

Details Thermoplastic lens barrel for holding assembly of lens elements Thermoplastic lens barrel for holding assembly of lens elements

1996-08-27

1998-02-17

Ben, Loha

Optical: systems and elements

Lens

With support

359820, 359523, 396 71, 396448, 396530, G02B 702

Patent

active

057197113

ABSTRACT:
A lens barrel for holding an assembly or group of lens elements is molded as an integral member from a thermoplastic resin material such as polycarbonate, and at least two of the lens elements have different diameters. The lens barrel includes an outer cylindrical wall portion having a uniform diameter and a uniform wall thickness, and a lens holder portion integrally extending from an inner surface of the outer cylindrical wall portion. The lens holder portion is formed in accordance with the different diameters of the lens elements such that wall thickness is substantially uniform.

REFERENCES:
patent: 3578847 (1971-05-01), Grey
patent: 3784287 (1974-01-01), Grey
patent: 4668048 (1987-05-01), Amberg et al.
patent: 4942414 (1990-07-01), Takahashi et al.
patent: 5016032 (1991-05-01), Haraguchi et al.
patent: 5052781 (1991-10-01), Iizuka
patent: 5097280 (1992-03-01), Nomura
patent: 5177641 (1993-01-01), Kobayashi
patent: 5301066 (1994-04-01), Higuchi et al.

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