JPS6474412A - Optical displacement detector - Google Patents
Optical displacement detectorInfo
- Publication number
- JPS6474412A JPS6474412A JP23343387A JP23343387A JPS6474412A JP S6474412 A JPS6474412 A JP S6474412A JP 23343387 A JP23343387 A JP 23343387A JP 23343387 A JP23343387 A JP 23343387A JP S6474412 A JPS6474412 A JP S6474412A
- Authority
- JP
- Japan
- Prior art keywords
- reflecting mirror
- emitting element
- light emitting
- light
- 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.)
- Pending
Links
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Optical Transform (AREA)
Abstract
PURPOSE:To improve the parallelism of illumination light which illuminates a main scale and a reference scale by constituting the reflection type optical displacement detector so that a light emitting element is arranged on a light receiving element side and the length of the optical path extending from the light emitting element to a reflecting mirror is made long. CONSTITUTION:A 1st member 18 where the main scale 16 is formed and a 2nd member 22 where the reference scale is formed are provided, and the light emitting element 24 and light receiving element 26 are arranged on the same side with those 1st and 2nd members. Further, the reflecting mirror 34 is arranged on the opposite side. The illumination light emitted by the light emitting element 24 reaches the reflecting mirror 28 through the 2nd member 22, 1st member 18, and a lens member 34 and is made into a parallel light beam, which returns to the light receiving element side. Consequently, the optical path from the light emitting element 24 to the reflecting mirror 28 is shorter than before and the focal length of the reflecting mirror 28 is made long to improve the parallelism of the illumination light which is transmitted through the main scale 16 and reference scale.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23343387A JPS6474412A (en) | 1987-09-17 | 1987-09-17 | Optical displacement detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23343387A JPS6474412A (en) | 1987-09-17 | 1987-09-17 | Optical displacement detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6474412A true JPS6474412A (en) | 1989-03-20 |
Family
ID=16954962
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23343387A Pending JPS6474412A (en) | 1987-09-17 | 1987-09-17 | Optical displacement detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6474412A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7034282B2 (en) | 2003-04-21 | 2006-04-25 | Mitsubishi Denki Kabushiki Kaisha | Optical rotary encoder |
TWI664398B (en) * | 2014-12-11 | 2019-07-01 | 日商東京可斯莫斯電機股份有限公司 | Optical rotary encoder |
KR102650909B1 (en) * | 2023-06-13 | 2024-03-26 | 주식회사 누리지오시스템 | Pole-type luminous tape measure for manhole and pipeline surveying for underground facilities |
-
1987
- 1987-09-17 JP JP23343387A patent/JPS6474412A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7034282B2 (en) | 2003-04-21 | 2006-04-25 | Mitsubishi Denki Kabushiki Kaisha | Optical rotary encoder |
TWI664398B (en) * | 2014-12-11 | 2019-07-01 | 日商東京可斯莫斯電機股份有限公司 | Optical rotary encoder |
KR102650909B1 (en) * | 2023-06-13 | 2024-03-26 | 주식회사 누리지오시스템 | Pole-type luminous tape measure for manhole and pipeline surveying for underground facilities |
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