JPH0462003B2 - - Google Patents
Info
- Publication number
- JPH0462003B2 JPH0462003B2 JP18915484A JP18915484A JPH0462003B2 JP H0462003 B2 JPH0462003 B2 JP H0462003B2 JP 18915484 A JP18915484 A JP 18915484A JP 18915484 A JP18915484 A JP 18915484A JP H0462003 B2 JPH0462003 B2 JP H0462003B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- radiation grating
- grating
- radiation
- rotation
- 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.)
- Expired
Links
- 230000005855 radiation Effects 0.000 claims description 50
- 230000010287 polarization Effects 0.000 claims description 7
- 238000005286 illumination Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 description 7
- 230000004907 flux Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P13/00—Indicating or recording presence, absence, or direction, of movement
- G01P13/02—Indicating direction only, e.g. by weather vane
- G01P13/04—Indicating positive or negative direction of a linear movement or clockwise or anti-clockwise direction of a rotational movement
- G01P13/045—Indicating positive or negative direction of a linear movement or clockwise or anti-clockwise direction of a rotational movement with speed indication
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/36—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light
- G01P3/366—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light by using diffraction of light
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Optical Transform (AREA)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18915484A JPS6166926A (ja) | 1984-09-10 | 1984-09-10 | ロ−タリ−エンコ−ダ− |
| US07/481,684 US4967072A (en) | 1984-09-05 | 1990-02-20 | Interferometric rotating condition detection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18915484A JPS6166926A (ja) | 1984-09-10 | 1984-09-10 | ロ−タリ−エンコ−ダ− |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6166926A JPS6166926A (ja) | 1986-04-05 |
| JPH0462003B2 true JPH0462003B2 (ru) | 1992-10-02 |
Family
ID=16236340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18915484A Granted JPS6166926A (ja) | 1984-09-05 | 1984-09-10 | ロ−タリ−エンコ−ダ− |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6166926A (ru) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02147816A (ja) * | 1988-11-29 | 1990-06-06 | Tokyo Seimitsu Co Ltd | スケール読取装置 |
| US5550635A (en) * | 1993-10-29 | 1996-08-27 | Canon Kabushiki Kaisha | Rotational deviation detecting method and system using a periodic pattern |
| US5442172A (en) * | 1994-05-27 | 1995-08-15 | International Business Machines Corporation | Wavefront reconstruction optics for use in a disk drive position measurement system |
| TW256914B (en) * | 1994-05-27 | 1995-09-11 | Ibm | Servo-writing system for use in a data recording disk drive |
| JP4093971B2 (ja) * | 2004-02-12 | 2008-06-04 | シャープ株式会社 | 光学式移動情報検出装置および移動情報検出システムおよび電子機器およびエンコーダ |
-
1984
- 1984-09-10 JP JP18915484A patent/JPS6166926A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6166926A (ja) | 1986-04-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |