JPS5512481A - Encoder - Google Patents
EncoderInfo
- Publication number
- JPS5512481A JPS5512481A JP8590478A JP8590478A JPS5512481A JP S5512481 A JPS5512481 A JP S5512481A JP 8590478 A JP8590478 A JP 8590478A JP 8590478 A JP8590478 A JP 8590478A JP S5512481 A JPS5512481 A JP S5512481A
- Authority
- JP
- Japan
- Prior art keywords
- light
- rotary disc
- slits
- natural
- received
- 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.)
- Pending
Links
Landscapes
- Optical Transform (AREA)
Abstract
PURPOSE: To reduce the power consumption and the size of a battery by using external lights such as a natural or room light to read out the behaviour of an optically measuring scale.
CONSTITUTION: A device body 1, which has a rotary disc 4 formed on its circumferencial edge with a number of transparent slits as an optically measuring scale, an index scale plate 5 formed with similar slits, and a light receiving element 6 made of a photo-electric converting element such as a phototransistor, is formed with an external light inlet 2, to which a collimator lens 3 is attached. Thus, the natural light entering from the outside of the body 1 in the direction of arrow is changed through the leans 3 into a parallel beam, which is received by the element 6 through the rotary disc 4, the index scale plate 5 and the like, especially, through their transparent slits. If the rotary disc 4 is turned a preset angle, the quantity of light received is periodically varied and is measured by a meter so that the rotating speed is detected. As a result, the desired objects can be attained without requiring the light emitting lamp as a light source.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8590478A JPS5512481A (en) | 1978-07-13 | 1978-07-13 | Encoder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8590478A JPS5512481A (en) | 1978-07-13 | 1978-07-13 | Encoder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5512481A true JPS5512481A (en) | 1980-01-29 |
Family
ID=13871825
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8590478A Pending JPS5512481A (en) | 1978-07-13 | 1978-07-13 | Encoder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5512481A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5877419U (en) * | 1981-11-19 | 1983-05-25 | 河口湖精密株式会社 | digital measuring instrument |
JPS595217A (en) * | 1982-07-02 | 1984-01-12 | Fanuc Ltd | Pulse encoder using optical fiber |
JPS5932813A (en) * | 1982-08-18 | 1984-02-22 | Diesel Kiki Co Ltd | Photo detector |
-
1978
- 1978-07-13 JP JP8590478A patent/JPS5512481A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5877419U (en) * | 1981-11-19 | 1983-05-25 | 河口湖精密株式会社 | digital measuring instrument |
JPS595217A (en) * | 1982-07-02 | 1984-01-12 | Fanuc Ltd | Pulse encoder using optical fiber |
JPS5932813A (en) * | 1982-08-18 | 1984-02-22 | Diesel Kiki Co Ltd | Photo detector |
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