JPS6432119A - Absolute encoder - Google Patents
Absolute encoderInfo
- Publication number
- JPS6432119A JPS6432119A JP18970787A JP18970787A JPS6432119A JP S6432119 A JPS6432119 A JP S6432119A JP 18970787 A JP18970787 A JP 18970787A JP 18970787 A JP18970787 A JP 18970787A JP S6432119 A JPS6432119 A JP S6432119A
- Authority
- JP
- Japan
- Prior art keywords
- luminous flux
- width
- illuminance distribution
- tracks
- scale
- 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
Landscapes
- Optical Transform (AREA)
- Analogue/Digital Conversion (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
PURPOSE:To detect the displacement state of a body to be measured with high accuracy by varying the width of each track of a main scale according to the illuminance distribution of the incident luminous flux of an illumination system on the main scale. CONSTITUTION:The luminous flux from a light source 4 is collimated by a condenser lens 6 into nearly parallel luminous flux, which illuminates respective tracks 21-27 on the main scale 2. Then, those tracks 21-27 increase in width according to the distance from the optical axis and the increasing width is set in consideration of the illuminance distribution on the scale 2. Consequently, the quantities of the light incident on respective photodetecting elements 51-57 through the respective slits 31-37 of a fixed scale 3 are equalized to equalize their output values. Thus, the tracks 21-27 are varied in width to correct the irregularity of the illuminance distribution of the luminous flux from the lens 6.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18970787A JPH0641855B2 (en) | 1987-07-29 | 1987-07-29 | Absolute unit encoder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18970787A JPH0641855B2 (en) | 1987-07-29 | 1987-07-29 | Absolute unit encoder |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6432119A true JPS6432119A (en) | 1989-02-02 |
JPH0641855B2 JPH0641855B2 (en) | 1994-06-01 |
Family
ID=16245848
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18970787A Expired - Lifetime JPH0641855B2 (en) | 1987-07-29 | 1987-07-29 | Absolute unit encoder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0641855B2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012103042A (en) * | 2010-11-08 | 2012-05-31 | Yaskawa Electric Corp | Reflection type encoder, servo motor, and servo unit |
JP2013083673A (en) * | 2013-02-13 | 2013-05-09 | Nikon Corp | Detection unit and encoder |
KR102147180B1 (en) | 2020-03-10 | 2020-08-24 | 홍석관 | Method for manufacturing paper grip and paper grip for box |
KR102219470B1 (en) | 2021-01-06 | 2021-02-23 | 홍석관 | Method for manufacturing paper grip and paper grip for box |
KR102308256B1 (en) | 2021-07-02 | 2021-10-05 | 홍석관 | Method for manufacturing paper grip with reinforcement and paper grip with reinforcement |
KR102308998B1 (en) | 2020-12-10 | 2021-10-05 | 홍석관 | Method for manufacturing paper grip and paper grip for box |
-
1987
- 1987-07-29 JP JP18970787A patent/JPH0641855B2/en not_active Expired - Lifetime
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012103042A (en) * | 2010-11-08 | 2012-05-31 | Yaskawa Electric Corp | Reflection type encoder, servo motor, and servo unit |
JP2013083673A (en) * | 2013-02-13 | 2013-05-09 | Nikon Corp | Detection unit and encoder |
KR102147180B1 (en) | 2020-03-10 | 2020-08-24 | 홍석관 | Method for manufacturing paper grip and paper grip for box |
KR102308998B1 (en) | 2020-12-10 | 2021-10-05 | 홍석관 | Method for manufacturing paper grip and paper grip for box |
KR102219470B1 (en) | 2021-01-06 | 2021-02-23 | 홍석관 | Method for manufacturing paper grip and paper grip for box |
KR102308256B1 (en) | 2021-07-02 | 2021-10-05 | 홍석관 | Method for manufacturing paper grip with reinforcement and paper grip with reinforcement |
Also Published As
Publication number | Publication date |
---|---|
JPH0641855B2 (en) | 1994-06-01 |
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