JPS57191513A - Optical scale reader - Google Patents

Optical scale reader

Info

Publication number
JPS57191513A
JPS57191513A JP7729781A JP7729781A JPS57191513A JP S57191513 A JPS57191513 A JP S57191513A JP 7729781 A JP7729781 A JP 7729781A JP 7729781 A JP7729781 A JP 7729781A JP S57191513 A JPS57191513 A JP S57191513A
Authority
JP
Japan
Prior art keywords
light
lens
prism
diffracted
polarized light
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
JP7729781A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0337126B2 (enrdf_load_stackoverflow
Inventor
Hideto Iwaoka
Koji Akiyama
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.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Electric Corp
Yokogawa Hokushin Electric Corp
Yokogawa Electric Works 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 Yokogawa Electric Corp, Yokogawa Hokushin Electric Corp, Yokogawa Electric Works Ltd filed Critical Yokogawa Electric Corp
Priority to JP7729781A priority Critical patent/JPS57191513A/ja
Publication of JPS57191513A publication Critical patent/JPS57191513A/ja
Publication of JPH0337126B2 publication Critical patent/JPH0337126B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/36—Forming the light into pulses
    • G01D5/38—Forming the light into pulses by diffraction gratings

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Optical Transform (AREA)
JP7729781A 1981-05-21 1981-05-21 Optical scale reader Granted JPS57191513A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7729781A JPS57191513A (en) 1981-05-21 1981-05-21 Optical scale reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7729781A JPS57191513A (en) 1981-05-21 1981-05-21 Optical scale reader

Publications (2)

Publication Number Publication Date
JPS57191513A true JPS57191513A (en) 1982-11-25
JPH0337126B2 JPH0337126B2 (enrdf_load_stackoverflow) 1991-06-04

Family

ID=13629949

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7729781A Granted JPS57191513A (en) 1981-05-21 1981-05-21 Optical scale reader

Country Status (1)

Country Link
JP (1) JPS57191513A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPH0337126B2 (enrdf_load_stackoverflow) 1991-06-04

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