JPH0337126B2 - - Google Patents
Info
- Publication number
- JPH0337126B2 JPH0337126B2 JP7729781A JP7729781A JPH0337126B2 JP H0337126 B2 JPH0337126 B2 JP H0337126B2 JP 7729781 A JP7729781 A JP 7729781A JP 7729781 A JP7729781 A JP 7729781A JP H0337126 B2 JPH0337126 B2 JP H0337126B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- lens
- scale
- receives
- outputs
- 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
- 230000003287 optical effect Effects 0.000 claims description 12
- 230000001427 coherent effect Effects 0.000 claims description 7
- 230000000903 blocking effect Effects 0.000 claims description 4
- 230000010363 phase shift Effects 0.000 claims description 4
- 230000010287 polarization Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003384 imaging method Methods 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Optical Transform (AREA)
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 JPS57191513A (en) | 1982-11-25 |
| JPH0337126B2 true JPH0337126B2 (en]) | 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 (en]) |
-
1981
- 1981-05-21 JP JP7729781A patent/JPS57191513A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57191513A (en) | 1982-11-25 |
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