JP2007064818A5 - - Google Patents
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- JP2007064818A5 JP2007064818A5 JP2005251899A JP2005251899A JP2007064818A5 JP 2007064818 A5 JP2007064818 A5 JP 2007064818A5 JP 2005251899 A JP2005251899 A JP 2005251899A JP 2005251899 A JP2005251899 A JP 2005251899A JP 2007064818 A5 JP2007064818 A5 JP 2007064818A5
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- JP
- Japan
- Prior art keywords
- slit
- light source
- rotating
- index
- rotating disk
- 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.)
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Claims (5)
前記光源が、前記回転ディスクの回転中心線上に配置され、前記光源スリットと前記インデックススリットと前記受光素子が、前記回転ディスクの回転中心に対して点対称な位置に１組以上配置されていることを特徴とする光学式エンコーダ。 A light source that emits diffused light, a rotating disk that is fixed to one member of two members that rotate relatively, and a member that is fixed to the other member and that is disposed with a gap between the light source and the rotating disk A fixed scale, a rotating slit formed on the rotating disk, a light source slit and an index slit formed on the fixed scale, and a light receiving element, and a fluctuation of a detection signal which is an output of the light receiving element In the optical encoder for detecting the relative angular displacement of the two members from
The light source is disposed on a rotation center line of the rotating disk, and the light source slit, the index slit, and the light receiving element are disposed in a point-symmetrical position with respect to the rotation center of the rotating disk. An optical encoder characterized by the following.
前記光源が、前記回転ディスクの回転中心線上に配置され、前記光源スリットと前記インデックススリットと前記受光素子が、前記回転ディスクの回転中心に対して環状に配置されていることを特徴とする光学式エンコーダ。 A light source that emits diffused light, a rotating disk that is fixed to one member of two members that rotate relatively, and a member that is fixed to the other member and that is disposed with a gap between the light source and the rotating disk A fixed scale, a rotating slit formed on the rotating disk, a light source slit and an index slit formed on the fixed scale, and a light receiving element, and a fluctuation of a detection signal which is an output of the light receiving element In the optical encoder for detecting the relative angular displacement of the two members from
The optical source, wherein the light source is disposed on a rotation center line of the rotating disk, and the light source slit, the index slit, and the light receiving element are annularly disposed with respect to the rotation center of the rotating disk. Encoder.
前記光源と前記光源スリット面間の距離をＬ１、
前記光源スリット面と前記回転スリット面間の距離をＬ２、
前記回転スリット面と前記インデックススリット面間の距離をＬ３、
前記光源からの任意の光線が前記回転スリットに入射する点と前記回転ディスクの回転中心との距離をｒＲ、
前記光源からの前記任意の光線が前記光源スリットに入射する点と前記回転ディスクの回転中心との距離をｒＬ、
前記光源からの前記任意の光線が前記インデックススリットに入射する点と前記回転ディスクの回転中心との距離をｒＩ、
回転スリットの１回転当たりのスリット数をＮＲ、
光源スリットの１回転当たりのスリット数をＮＬ、
インデックススリットの１回転当たりのスリット数をＮＩ
とすると、
ＮＬ＝（ｒＬ／ｒＲ）ＮＲ
ＮＩ＝（ｒＩ／ｒＲ）ＮＲ
の関係が成立することを特徴とする請求項１または２記載の光学式エンコーダ。 The surfaces on which the rotating slit, the light source slit, and the index slit are respectively formed are defined as a rotating slit surface, a light source slit surface, and an index slit surface. The light source, the light source slit surface, the rotating slit surface, and the index slit surface are parallel to each other in this order. When placed virtually on
The distance between the light source and the light source slit surface is L1,
The distance between the light source slit surface and the rotating slit surface is L2,
The distance between the rotating slit surface and the index slit surface is L3,
The distance between a point where an arbitrary light beam from the light source enters the rotary slit and the rotation center of the rotary disk is rR,
The distance between the point at which the arbitrary light beam from the light source enters the light source slit and the rotation center of the rotating disk is rL,
The distance between the point where the arbitrary light beam from the light source enters the index slit and the rotation center of the rotating disk is rI,
The number of slits per rotation of the rotating slit is NR,
The number of slits per rotation of the light source slit is NL,
The number of slits per rotation of the index slit is NI
Then,
NL = (rL / rR) NR
NI = (rI / rR) NR
Claim 1 or 2 optical encoder according relationship is characterized in that hold.
前記光源と前記光源スリット面間の距離をＬ１、
前記光源スリット面と前記回転スリット面間の距離をＬ２、
前記回転スリット面と前記インデックススリット面間の距離をＬ３、
前記光源からの任意の光線が前記回転スリットに入射する点と前記回転ディスクの回転中心との距離をｒＲ、
前記光源からの前記任意の光線が前記光源スリットに入射する点と前記回転ディスクの回転中心との距離をｒＬ、
前記光源からの前記任意の光線が前記インデックススリットに入射する点と前記回転ディスクの回転中心との距離をｒＩ、
回転スリットの１回転当たりのスリット数をＮＲ、
光源スリットの１回転当たりのスリット数をＮＬ、
インデックススリットの１回転当たりのスリット数をＮＩ
とすると、
ＮＬ＝（ｒＬ／２ｒＲ）ＮＲ
ＮＩ＝（ｒＩ／２ｒＲ）ＮＲ
の関係が成立することを特徴とする請求項１または２記載の光学式エンコーダ。 The surfaces on which the rotating slit, the light source slit, and the index slit are respectively formed are defined as a rotating slit surface, a light source slit surface, and an index slit surface. When placed virtually on
The distance between the light source and the light source slit surface is L1,
The distance between the light source slit surface and the rotating slit surface is L2,
The distance between the rotating slit surface and the index slit surface is L3,
The distance between a point where an arbitrary light beam from the light source enters the rotary slit and the rotation center of the rotary disk is rR,
The distance between the point at which the arbitrary light beam from the light source enters the light source slit and the rotation center of the rotating disk is rL,
The distance between the point where the arbitrary light beam from the light source enters the index slit and the rotation center of the rotating disk is rI,
NR, the number of slits per rotation of the rotation slit,
The number of slits per rotation of the light source slit is NL,
The number of slits per rotation of the index slit is NI
Then,
NL = (rL / 2rR) NR
NI = (rI / 2rR) NR
Claim 1 or 2 optical encoder according relationship is characterized in that hold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005251899A JP2007064818A (en) | 2005-08-31 | 2005-08-31 | Optical encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005251899A JP2007064818A (en) | 2005-08-31 | 2005-08-31 | Optical encoder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2007064818A JP2007064818A (en) | 2007-03-15 |
| JP2007064818A5 true JP2007064818A5 (en) | 2008-09-18 |
Family
ID=37927183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2005251899A Pending JP2007064818A (en) | 2005-08-31 | 2005-08-31 | Optical encoder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2007064818A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5538870B2 (en) * | 2009-12-24 | 2014-07-02 | キヤノン株式会社 | Rotary encoder |
| JP5099459B2 (en) * | 2010-03-19 | 2012-12-19 | 株式会社安川電機 | Optical all-around encoder and motor system |
| JP5618094B2 (en) * | 2011-10-05 | 2014-11-05 | 株式会社安川電機 | Optical all-around encoder and motor system |
| CN103616040A (en) * | 2013-11-23 | 2014-03-05 | 冶金自动化研究设计院 | Combined type optical-electricity encoder with copper code disc |
| JP2023183432A (en) * | 2022-06-16 | 2023-12-28 | 多摩川精機株式会社 | Rotary encoder |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0735575A (en) * | 1993-07-23 | 1995-02-07 | Sharp Corp | Rotation detecting device |
| JP3509830B2 (en) * | 1995-11-08 | 2004-03-22 | 株式会社安川電機 | Optical rotary encoder |
| JP2002277286A (en) * | 2001-03-16 | 2002-09-25 | Hitachi Maxell Ltd | Device of detecting rotation displacement amount and disk |
-
2005
- 2005-08-31 JP JP2005251899A patent/JP2007064818A/en active Pending
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