05721721 is referenced by 57 patents and cites 20 patents.

An encoder includes an electrically conductive reference scale having surface steps formed at predetermined positions; an electrically conductive probe having a tip disposed opposed to the reference scale; wherein the reference scale and the probe are relatively movable in a direction different from the opposing direction of the tip of the probe and the reference scale; a portion for applying an electrical voltage to between the reference scale and the probe; a portion for detecting a change in a tunnel current between the reference scale and the probe, to between which the electric voltage is applied by the voltage applying portion at the time of the relative movement between the scale and the probe, the detecting portion detecting the change in the tunnel current when the probe passes a position opposed to a surface step of the reference scale; and portion for detecting the amount of the relative movement between the scale and probe, on the basis of the detection by the change detecting portion.

Title
Two scanning probes information recording/reproducing system with one probe to detect atomic reference location on a recording medium
Application Number
235552
Publication Number
5721721
Application Date
January 22, 1996
Publication Date
February 24, 1998
Inventor
Hiroyasu Nose
Zama
JP
Akihiko Yamano
Yokohama
JP
Kenji Saitoh
Yokohama
JP
Minoru Yoshii
Tokyo
JP
Toshimitsu Kawase
Atsugi
JP
Eigo Kawakami
Ebina
JP
Ken Eguchi
Yokohama
JP
Hisaaki Kawade
Atsugi
JP
Kunihiro Sakai
Isehara
JP
Haruki Kawada
Yokohama
JP
Hiroshi Matsuda
Isehara
JP
Yuko Morikawa
Kawasaki
JP
Yoshihiro Yanagisawa
Atsugi
JP
Agent
Fitzpatrick Cella Harper & Scinto
Assignee
Canon Kabushiki Kaisha
JP
IPC
G11B 7/00
View Original Source