Objective lens holding device

Details Objective lens holding device Objective lens holding device

1992-07-14

1995-09-26

Dzierzynski, Paul M.

Optical: systems and elements

Lens

With support

359814, 369 4414, 369 4424, G02B 702, G11B 708

Patent

active

054538815

ABSTRACT:
An objective lens holding device has a lens holder supporting an objective lens and a parallel link. The lens holder is installed in a housing through the parallel link. The parallel link is provided with hinges, made of synthetic resin, that can be elastically distorted so as to shift the lens holder in the focusing direction. A stopper in a protruding fashion is installed on the parallel link in order to prevent the lens holder from contact with the inner wall of the housing even if the hinges become softened to cause the lens holder to be dislocated under high temperature. Therefore, the arrangement prevents the lens holder from being distorted by the contact between the lens holder and the inner wall under high temperature. As a result, when the ambient temperature drops to normal temperature and thereby the hinges recover their original modulus of elasticity to allow the lens holder to move to the original position, the lens holder is allowed to return to its original position without having a deviation from its original state. Therefore, deterioration in optical performance due to changes of installation accuracy of the objective lens can be eliminated.

REFERENCES:
patent: 5243584 (1993-09-01), Kang
Patent Abstracts Of Japan, unexamined applications, P field, vol. 14, No. 230 May 16, 1990 The Patent Office Japanese Government p. 18 P 1048.

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