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US 6,151,185 AGranted
Position detecting apparatus, positioning apparatus, and information recording apparatus using the same
AssigneeCanon Kabushiki Kaisha
InventorsKou Ishizuka, Hidejiro Kadowaki, Makoto Takamiya
Life of this patent
Estimating the term…
Abstract
An apparatus for detecting position change information of an object includes a contact member for contacting the object, and a detecting unit for obtaining position change information of the object by detecting a change in force applied from the object to the contact member.
Claims16
An apparatus for detecting position change information of an object, comprising:
- a contact member that mechanically contacts the object so as to be displaced by a change in force applied from the object;
- and
- a detecting unit for obtaining position change information of the object by detecting a change in force applied from the object to said contact member, said detecting unit detecting a change in force applied from the object by detecting a change in position of said contact member utilizing interference light of light passed through at least one of said contact member and a member integrally provided on said contact member by use of an interferometer.
An apparatus for positioning an object, comprising:
- a contact member that mechanically contacts the object so as to be displaced by a change in force applied from the object;
- and
- a position control system for positioning the object by moving said contact member while controlling a position of the object such that a change in force applied from the object to said contact member is canceled, said position control system detecting a change in force applied from the object by detecting a change in position of said contact member utilizing interference light of light passed through at least one of said contact member and a member integrally provided on said contact member by use of an interferometer.
An apparatus for recording information on a hard disk of a hard disk drive having internal magnetic head arm means, comprising:
- an arm member so arranged as to pivot about substantially the same rotational axis as said magnetic head arm means;
- a contact member provided on said arm member to contact with said magnetic head arm means;
- a detecting unit for detecting a change in force applied from said magnetic head arm means to said contact member;
- a position control system for controlling a rotational position of said magnetic head arm means in a direction in which the detection result from said detecting unit is canceled;
- a pivoting control system for controlling a rotational position of said arm member to control a position of said magnetic head arm means;
- and
- a signal system for transmitting a signal, by which a magnetic head records information on a hard disk, to said magnetic head.
4 more elements
Dependencies are inferred from the claim text.