JPS646816A - Optical position detector - Google Patents

Optical position detector

Info

Publication number
JPS646816A
JPS646816A JP16099587A JP16099587A JPS646816A JP S646816 A JPS646816 A JP S646816A JP 16099587 A JP16099587 A JP 16099587A JP 16099587 A JP16099587 A JP 16099587A JP S646816 A JPS646816 A JP S646816A
Authority
JP
Japan
Prior art keywords
light
rotary disk
slit
recorded
codes indicating
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.)
Pending
Application number
JP16099587A
Other languages
Japanese (ja)
Inventor
Yasumasa Sakai
Hiroshi Kitajima
Maki Yamashita
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.)
Omron Corp
Original Assignee
Omron Tateisi Electronics Co
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 Omron Tateisi Electronics Co filed Critical Omron Tateisi Electronics Co
Priority to JP16099587A priority Critical patent/JPS646816A/en
Publication of JPS646816A publication Critical patent/JPS646816A/en
Pending legal-status Critical Current

Links

Landscapes

  • Optical Transform (AREA)
  • Analogue/Digital Conversion (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

PURPOSE:To reduce the size of a device and to improve the accuracy of position detection by projecting light on a code disk which is optically readable and where codes indicating absolute position information are recorded, and photodetecting its transmitted signal light or reflected signal light. CONSTITUTION:The rotary disk 11 is divided at constant angle intervals (pitch P) and Gray codes indicating absolute angle position (absolute number) are recorded at the respective divided parts in their recording zone R. Light emitted by a light source 1 passes through the slit of a slit plate 3 and is projected on the recording zones R of the rotary disk 11. This projection light is converged in the peripheral direction of the rotary disk 11 and expanded radially to become long. This slit projection light illuminates a one-pitch range. The light transmitted through the rotary disk 11 is photodetected by a CCD 4 arranged on the opposite side from the light source 1 across the rotary disk 11.
JP16099587A 1987-06-30 1987-06-30 Optical position detector Pending JPS646816A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16099587A JPS646816A (en) 1987-06-30 1987-06-30 Optical position detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16099587A JPS646816A (en) 1987-06-30 1987-06-30 Optical position detector

Publications (1)

Publication Number Publication Date
JPS646816A true JPS646816A (en) 1989-01-11

Family

ID=15726571

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16099587A Pending JPS646816A (en) 1987-06-30 1987-06-30 Optical position detector

Country Status (1)

Country Link
JP (1) JPS646816A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009058497A (en) * 2007-08-08 2009-03-19 Hosiden Corp Electronic measuring tape
JP2012233883A (en) * 2011-05-05 2012-11-29 Dr Johannes Heidenhain Gmbh Optical position measuring apparatus
JP2016151516A (en) * 2015-02-18 2016-08-22 キヤノン株式会社 Encoder and device using the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009058497A (en) * 2007-08-08 2009-03-19 Hosiden Corp Electronic measuring tape
JP2012233883A (en) * 2011-05-05 2012-11-29 Dr Johannes Heidenhain Gmbh Optical position measuring apparatus
JP2016151516A (en) * 2015-02-18 2016-08-22 キヤノン株式会社 Encoder and device using the same

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