Focusing method selectable zoom optical system

Details Focusing method selectable zoom optical system Focusing method selectable zoom optical system

2005-02-08

2005-02-08

Mai, Huy (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S687000, C396S081000

Reexamination Certificate

active

06853501

ABSTRACT:
A zoom optical system capable of selecting different focusing methods is disclosed. This zoom optical system includes a variable power unit that performs a variable power operation while moving during zooming; a first focusing unit positioned in front of the variable power unit; a second focusing unit positioned at the back of the variable power unit; a sensor that detects the position of the first focusing unit; and a memory that stores movement information of the second focusing unit during zooming according to the position of the first focusing unit. Herein, the second focusing unit changes in the moving locus thereof during zooming, based on the position information about the first focusing unit detected by the sensor and the information from the memory.

REFERENCES:
patent: 5027147 (1991-06-01), Kaneda
patent: 5146071 (1992-09-01), Ookubo et al.
patent: 6285154 (2001-09-01), Yasuda et al.
patent: 6553185 (2003-04-01), Inaba et al.
patent: 6556356 (2003-04-01), Ohtake
patent: 56-13287 (1981-03-01), None
patent: 59-71016 (1984-04-01), None

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