Electrically-driven coarse and fine movement apparatus

Details Electrically-driven coarse and fine movement apparatus Electrically-driven coarse and fine movement apparatus

1997-12-11

2000-05-16

Spyrou, Cassandra

Optical: systems and elements

Compound lens system

Microscope

359383, G02B 2126

Patent

active

060645199

ABSTRACT:
An electrically-driven coarse and fine movement apparatus comprises a movable member, a driving device for driving the movable member, a first operation handle, a first rotary shaft fixed to the first operation handle, a second operation handle, disposed coaxially with the first operation handle, for rotating the first rotary shaft, a rotation restricting member for restricting a rotation of the second operation handle, which is accompanied with the rotation of the first operation handle, a rotation detector for detecting a rotational quantity and a rotational direction of the first rotary shaft, a discriminating device, linked to the second operation handle, for judging whether the second operation handle is operated or not to output a judging signal, and a controlling circuit for controlling the driving device so as to provide the movable member with a coarse movement in accordance with an operation of one operation handle of the first and second operation handles and to provide the movable member with a fine movement in accordance with an operation of the other handle by judging whether the operation is a drive operation by the first operation handle or by the second operation handle on the basis of a detection signal from the rotation detector and the judging signal from the discriminating device.

REFERENCES:
patent: 4653878 (1987-03-01), Nakasato et al.
patent: 4930882 (1990-06-01), Koch et al.
patent: 5260825 (1993-11-01), Nagano et al.
patent: 5557456 (1996-09-01), Garner et al.
patent: 5825531 (1998-10-01), Otomo

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