Optical device

Details Optical device Optical device

2006-11-07

2006-11-07

Dong, Hung Xuan (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S703000

Reexamination Certificate

active

07133216

ABSTRACT:
There is provided an optical device which comprises a fixed barrel, a movable cam ring, and collars and abutments. The movable cam ring is shifted relative to the fixed barrel to move an optical unit, the movable cam ring being fitted to the fixed barrel. Collars and abutments can be engaged with each other when the movable cam ring is in a predetermined positional relationship with respect to the fixed barrel. The collars and abutments preventing the movable cam ring from being disengaged from the fixed barrel and displaced in a direction along an optical axis relative to the fixed barrel.

REFERENCES:
patent: 4759618 (1988-07-01), Kamata
patent: H04-208907 (1992-07-01), None
patent: H10-020178 (1998-01-01), None

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