Drive unit for the adjustment of a zoom, focus or iris diaphragm

Details Drive unit for the adjustment of a zoom, focus or iris diaphragm Drive unit for the adjustment of a zoom, focus or iris diaphragm

1994-10-03

1996-04-16

Nguyen, Thong Q.

Optical: systems and elements

Lens

With support

359697, 359704, G02B 702, G02B 1514

Patent

active

055088520

ABSTRACT:
The invention relates to a drive unit for the adjustment of the zoom, focus or iris ring of a camera lens. According to the invention, the drive unit comprises a drive shaft arranged parallel to the axis of the camera lens, a pin and groove arrangement for allowing axial displacement of the drive shaft, a pinion connected to the drive shaft and coupled to the external teeth of a lens ring of the camera lens, and two circular flanges connected to the drive shaft and for embracing a sector of the lens ring to pull along the drive shaft and the pinion as the lens ring moves axially. The invention creates a drive unit which allows adjustment of a lens ring even if the lens ring is displaced axially.

REFERENCES:
patent: 2797618 (1957-07-01), Bloomberg et al.
patent: 2940373 (1960-06-01), Berg et al.
patent: 3239417 (1963-08-01), Eguchi et al.
patent: 3324780 (1967-06-01), Hiyauchi
patent: 4057327 (1977-11-01), Kumazawa
patent: 4235509 (1980-11-01), Takabayashi

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