Drive and support structure of an objective lens

Details Drive and support structure of an objective lens Drive and support structure of an objective lens

1985-07-12

1988-01-19

Punter, William H.

G02B 704

Patent

active

047201851

ABSTRACT:
A drive and support structure of an objective lens, for an optical information reading system for example, has a very much simplified construction. An objective lens and a focusing coil fixed thereto is placed in a hollow space formed in a magnetic circuit without any pole piece projecting into the focusing coil generally used in conventional arrangements. With this simplified construction, the total weight of driven parts is vary much reduced to improve a follow-up characteristic of a focus servo control system. At the same time, the size of the drive and support structure is made much smaller than conventional arrangement both in its diameter and its height.

REFERENCES:
patent: 4473274 (1984-09-01), Yano et al.
patent: 4554653 (1985-11-01), Malissin et al.
patent: 4557564 (1985-12-01), Van Rosmalen
patent: 4566089 (1986-01-01), Kime
patent: 4596448 (1986-06-01), Kikuchi

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