Lens barrel comprising an ultrasonic motor

Details Lens barrel comprising an ultrasonic motor Lens barrel comprising an ultrasonic motor

1998-04-09

1999-04-27

Epps, Georgia

Optical: systems and elements

Lens

With variable magnification

359823, 359824, G02B 1514, G02B 702

Patent

active

058985263

ABSTRACT:
A lens barrel comprises a focusing optical system for moving in the direction of the optical axis to perform a focusing operation, an ultrasonic motor used for the automatic focus control, containing a stator and a rotor, and disposed around the optical axis, a motion transformation/transmission mechanism for moving the focusing optical system in the direction of the optical axis on the basis of a rotation of the rotor, a manual operation member to be rotated manually, and a motor holding device for holding the motor to be rotated by a rotation of the manual operation member so as to rotate the rotor, wherein said motor is held on the motor holding device to have the stator and the rotor provided from the light incident side toward the lens barrel in the named order.

REFERENCES:
patent: 4963000 (1990-10-01), Kawai
patent: 5708872 (1998-01-01), Fukino
patent: 5751502 (1998-05-01), Watanabe

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