Lens barrel and metallic mold for molding the same

Details Lens barrel and metallic mold for molding the same Lens barrel and metallic mold for molding the same

1996-02-02

1997-04-22

Epps, Georgia Y.

Optical: systems and elements

Lens

With support

359811, G02B 702

Patent

active

056233736

ABSTRACT:
A lens barrel is formed by a forming process using metallic molds. The mold forms a first lens holding component and a second lens holding component with high accuracy and centered around the same axis by using the same mold component to form the first and second lens holding components. The first and second lens holding components are separated in the axial direction by an abutting component, and adjacent abutting components are separate in a circumferential direction of the lens barrel by a concave component. Each first lens holding component is formed in a concave component. A release component, which has an inner diameter larger than the inner diameter of the first lens holding component, is formed between the first lens holding components in the circumferential direction. Additionally, the molds for molding the lens barrel of this invention are constructed such that a first mold forms the second lens holding component, the abutting joint component, and the first lens holding component. A second metallic mold, which is to form the release component, is inserted into the first metallic mold. Because both the first and second lens holding components are formed by the first mold, any axial shift between the first and second molds does not affect optical performance.

REFERENCES:
patent: 5493452 (1996-02-01), Hoshino

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