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Patent Searching and Data


Title:
METHOD AND DEVICE FOR CONTROLLING POSITION, AND FOCUSING SERVO DEVICE USING THE SAME
Document Type and Number:
Japanese Patent JP3535089
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To reduce a transition phenomenon in a transition from focus leading-in control to focusing control in a focusing servo device to eliminate a focus leading-in error.
SOLUTION: The focus leading-in control is continued even within an area where the focusing servo control is allowed, and the focus leading-in control is switched to the focusing servo control at the point of time when the present position of a position control object coincides with a target position.


Inventors:
Akaike, Takenori
Yamamoto, Takeshi
Application Number:
JP2000000335636
Publication Date:
June 07, 2004
Filing Date:
November 02, 2000
Export Citation:
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Assignee:
MITSUTOYO CORP
International Classes:
G02B7/28; G05D3/12; G11B7/085; G11B7/09; (IPC1-7): G05D3/12; G11B7/085; G11B7/09
Attorney, Agent or Firm:
高矢 諭 (外2名)