Optical: systems and elements – Lens – With support
Patent
1997-04-14
1999-04-27
Ben, Loha
Optical: systems and elements
Lens
With support
359696, 359699, 359824, 396133, G02B 702
Patent
active
058985280
ABSTRACT:
Lens barrel with built-in ultrasonic motor, comprises photographing optical system having lens movable in the direction of the optical axis, fixed barrel supporting the optical system, manual operation member held on the fixed barrel and rotatable by external operation, ultrasonic motor including stationary member which is provided on fixed barrel and is rotatable about the optical axis and which can generate ultrasonic wave and rotor which is in frictional contact with stationary member and rotatable about the optical axis, and mode selection member by which is selectable automatic focus adjusting mode and manual focus adjustment mode. When automatic focus adjustment mode is selected stationary member is fixed to fixed barrel and rotor is rotated by ultrasonic wave generated by stationary member, and when manual focus adjustment mode is selected stationary member is released so that rotor and stationary member are united as one body to rotate together in coordination with manual operation of manual operation member.
REFERENCES:
patent: 5335115 (1994-08-01), Kawai et al.
patent: 5418650 (1995-05-01), Imanari et al.
patent: 5453807 (1995-09-01), Iizuka
patent: 5546233 (1996-08-01), Imanari et al.
patent: 5663842 (1997-09-01), Takayama et al.
Ben Loha
Nikon Corporation
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