JPS5724817A - Reading device for optical type scale - Google Patents
Reading device for optical type scaleInfo
- Publication number
- JPS5724817A JPS5724817A JP10103580A JP10103580A JPS5724817A JP S5724817 A JPS5724817 A JP S5724817A JP 10103580 A JP10103580 A JP 10103580A JP 10103580 A JP10103580 A JP 10103580A JP S5724817 A JPS5724817 A JP S5724817A
- Authority
- JP
- Japan
- Prior art keywords
- light
- scale
- constitution
- lens
- diffraction
- 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
Links
- 230000003287 optical effect Effects 0.000 title 1
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)
- Instruments For Measurement Of Length By Optical Means (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Optical Transform (AREA)
Abstract
PURPOSE:To simplify a constitution, by a method wherein an interference light by a primary diffraction light of a laser light projected to a scale is detected by 4 light-receiving elements displaced in position by 90 deg. respectively. CONSTITUTION:A light from a laser light source 30 is collected to a scale 30 through a half mirror 31 and lens L10. A zero-th order light, out of diffraction lights, is chekced by means of a stopper 32, the balancing diffraction lights are collected by means of a lens 10, and beat pattern S due to the primary diffraction light is produced at a screen 34 through a half mirror 31. The opening ratio of the lens L10 is appropriately set thereupon so that the secondary diffraction light and upward is prevented from bumping against a screen 30. The beat pattern is detected by means of light-receiving elements d1-d4 displaced in position by 90 deg.. The output is inputted as signals PA-PD to a controller 35 through buffer amplifiers A-D, signals (PA-Pc), corresponding to a moving distance of a scale 33, are outputted from an output terminal OUT1, and a signal in the moving direction of the scale 33 is outputted from an OUT2 utilizing a phase difference between (PA-Pc) and (PB- PD). Thereby, simplification of the constitution is realized.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10103580A JPS5724817A (en) | 1980-07-23 | 1980-07-23 | Reading device for optical type scale |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10103580A JPS5724817A (en) | 1980-07-23 | 1980-07-23 | Reading device for optical type scale |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5724817A true JPS5724817A (en) | 1982-02-09 |
JPS6128923B2 JPS6128923B2 (en) | 1986-07-03 |
Family
ID=14289903
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10103580A Granted JPS5724817A (en) | 1980-07-23 | 1980-07-23 | Reading device for optical type scale |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5724817A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5764717U (en) * | 1980-10-06 | 1982-04-17 | ||
JPS61176817A (en) * | 1985-01-31 | 1986-08-08 | Foster Denki Kk | Encoder |
JPS62121314A (en) * | 1985-11-21 | 1987-06-02 | ドクトル・ヨハネス・ハイデンハイン・ゲゼルシヤフト・ミト・ベシユレンクテル・ハフツング | Photoelectric position measuring device |
JPS63277922A (en) * | 1987-05-11 | 1988-11-15 | Canon Inc | Length measuring instrument |
JPH01187406A (en) * | 1988-01-22 | 1989-07-26 | Rikagaku Kenkyusho | Method and device for detecting position of equal-interval interference fringe |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111976327B (en) | 2019-05-24 | 2022-07-05 | 佳能株式会社 | Method for processing sheets, binding method and bound product |
-
1980
- 1980-07-23 JP JP10103580A patent/JPS5724817A/en active Granted
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5764717U (en) * | 1980-10-06 | 1982-04-17 | ||
JPS61176817A (en) * | 1985-01-31 | 1986-08-08 | Foster Denki Kk | Encoder |
JPS62121314A (en) * | 1985-11-21 | 1987-06-02 | ドクトル・ヨハネス・ハイデンハイン・ゲゼルシヤフト・ミト・ベシユレンクテル・ハフツング | Photoelectric position measuring device |
JPH0130089B2 (en) * | 1985-11-21 | 1989-06-16 | Dokutoru Yohanesu Haidenhain Gmbh | |
JPS63277922A (en) * | 1987-05-11 | 1988-11-15 | Canon Inc | Length measuring instrument |
JPH0648169B2 (en) * | 1987-05-11 | 1994-06-22 | キヤノン株式会社 | Length measuring device |
JPH01187406A (en) * | 1988-01-22 | 1989-07-26 | Rikagaku Kenkyusho | Method and device for detecting position of equal-interval interference fringe |
Also Published As
Publication number | Publication date |
---|---|
JPS6128923B2 (en) | 1986-07-03 |
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