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Position detecting apparatus, positioning apparatus, and information recording apparatus using the same

  • US 6,151,185 A
  • Filed: 09/04/1997
  • Issued: 11/21/2000
  • Est. Priority Date: 09/05/1996
  • Status: Expired due to Fees
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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