JPS6474407A - Position detector - Google Patents

Position detector

Info

Publication number
JPS6474407A
JPS6474407A JP23332887A JP23332887A JPS6474407A JP S6474407 A JPS6474407 A JP S6474407A JP 23332887 A JP23332887 A JP 23332887A JP 23332887 A JP23332887 A JP 23332887A JP S6474407 A JPS6474407 A JP S6474407A
Authority
JP
Japan
Prior art keywords
disk
magnetic head
reflection type
nearby
moving body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP23332887A
Other languages
Japanese (ja)
Other versions
JPH0574001B2 (en
Inventor
Yuichi Kurosawa
Kohei Iketani
Tahei Morisawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Priority to JP23332887A priority Critical patent/JPS6474407A/en
Publication of JPS6474407A publication Critical patent/JPS6474407A/en
Publication of JPH0574001B2 publication Critical patent/JPH0574001B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

PURPOSE:To accurate detect the specific position of a moving body in linear motion by one position sensor by shielding a rotary member provided with a body to be detected and the position sensor arranged on a fixed side within a specific range except nearby the specific position of the moving body. CONSTITUTION:When a magnetic head 18 moves to nearby the innermost peripheral track position, a cut 50b is positioned between a disk 40 and a reflection type photointerrupter 46 and light projected by a projecting element 46a is reflected by a reflecting surface 40a and projected on a photodetecting element 46b. When the magnetic head 18 comes accurately to the innermost peripheral track, the absorbing surface 40b of the disk 40 is positioned on the side of the reflection type photointerrupter 46, the light emitted by the projecting element 46a is absorbed by the absorbing surface 40b, and the photodetecting element 46b detects no reflected light, so that a stepping motor 24 is stopped from rotating.
JP23332887A 1987-09-17 1987-09-17 Position detector Granted JPS6474407A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23332887A JPS6474407A (en) 1987-09-17 1987-09-17 Position detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23332887A JPS6474407A (en) 1987-09-17 1987-09-17 Position detector

Publications (2)

Publication Number Publication Date
JPS6474407A true JPS6474407A (en) 1989-03-20
JPH0574001B2 JPH0574001B2 (en) 1993-10-15

Family

ID=16953421

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23332887A Granted JPS6474407A (en) 1987-09-17 1987-09-17 Position detector

Country Status (1)

Country Link
JP (1) JPS6474407A (en)

Also Published As

Publication number Publication date
JPH0574001B2 (en) 1993-10-15

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees