Geometrical instruments – Gauge – Work support adjustment
Patent
1995-06-07
1996-04-02
Fulton, Christopher W.
Geometrical instruments
Gauge
Work support adjustment
33 1M, 33573, G01B 5004
Patent
active
055028993
ABSTRACT:
A positioning staging apparatus comprises a base provided on a floor, a stage provided on the base and movable to the base, an output unit for outputting stage positioning information for moving the stage to a predetermined target position, a stage drive unit provided on the base for driving the stage and outputting the drive information, a stage control unit for controlling the stage drive unit to accelerate and decelerate the stage in accordance with the stage positioning information to stop the stage at the target position, a stage displacement detection unit for detecting the displacement of the stage driven by the stage drive unit to output the stage displacement information, and an anti-vibration unit provided between the floor and the base for applying to the base a force to suppress the vibration of the base generated by the movement of the stage. The anti-vibration unit generates the suppression force in accordance with one of the stage displacement information and the stage positioning information.
REFERENCES:
patent: 4525659 (1985-01-01), Imahashi et al.
patent: 4941265 (1990-07-01), Heiland
patent: 5030901 (1991-07-01), Futami
patent: 5251863 (1993-10-01), Gossman et al.
Yamaguchi Atsushi
Yamasaki Shigeru
Fulton Christopher W.
Nikon Corporation
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