Position detecting apparatus, positioning apparatus, and information recording apparatus using the same
First Claim
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1. 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.
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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.
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Citations
16 Claims
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1. An apparatus for detecting position change information of an object, comprising:
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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. - View Dependent Claims (2, 3, 4)
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5. An apparatus for positioning an object, comprising:
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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. - View Dependent Claims (6, 7, 8)
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9. An apparatus for recording information on a hard disk of a hard disk drive having internal magnetic head arm means, comprising:
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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. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification