Whole group focusing structure

Details Whole group focusing structure Whole group focusing structure

2007-02-06

2007-02-06

Mack, Ricky (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S704000

Reexamination Certificate

active

11306890

ABSTRACT:
A whole group focusing structure comprises a lens track cylinder, a first lens group, a second lens group, and a drive motor is used to rotate and move the lens track cylinder, so as to carry out focus between the first and second lens groups. A slant parallel section is formed in each of the two guiding tracks at the end of the guiding block, and the slant parallel section is used to perform focus. The whole group focusing structure only needs a set of drive and control system to perform focus and zoom, therefore, the present invention is a high quality whole group focusing structure that can meet market needs.

REFERENCES:
patent: 6049432 (2000-04-01), Machida et al.
patent: 2002/0093745 (2002-07-01), Takanashi et al.
patent: 2004/0196573 (2004-10-01), Nomura et al.

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