Lens barrel

Details Lens barrel Lens barrel

2010-08-10

2011-12-13

Martinez, Joseph P (Department: 2873)

Optical: systems and elements

Lens

With light limiting or controlling means

Reexamination Certificate

active

08077403

ABSTRACT:
A lens barrel has a first lens group, a second lens group, a third lens group, a first support frame for supporting the first lens group, a second support frame for supporting the second lens group, a first driving unit, a shutter unit, and an aperture unit. The first lens group has an overall negative refractive power, and includes a prism. The second support frame is driven along a second optical axis by the first driving unit. The shutter unit has a shutter mechanism, a shutter drive motor configured to drive the shutter mechanism, a neutral density filter, and a filter drive motor configured to drive the neutral density filter. The shutter drive motor and the filter drive motor are disposed flanking the second optical axis when viewed in a direction along the second optical axis.

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