JPH02618U - - Google Patents
Info
- Publication number
- JPH02618U JPH02618U JP7773688U JP7773688U JPH02618U JP H02618 U JPH02618 U JP H02618U JP 7773688 U JP7773688 U JP 7773688U JP 7773688 U JP7773688 U JP 7773688U JP H02618 U JPH02618 U JP H02618U
- Authority
- JP
- Japan
- Prior art keywords
- detection
- optical sensor
- parts
- detection pattern
- light
- 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
- 238000001514 detection method Methods 0.000 claims description 15
- 239000011521 glass Substances 0.000 claims 3
- 230000003287 optical effect Effects 0.000 claims 3
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
Landscapes
- Optical Transform (AREA)
Description
第１図は本考案の一実施例にかかる位置検出装
置を示す概略図、第２図は検出光の反射の状態を
示す概略図、第３図は第１図の装置で得られる検
出信号の波形を示すグラフ図、第４図は従来装置
の一例を示す概略図、第５図は第４図の装置での
検出光の反射状態を示す概略図、第６図は検出光
と検出パターンの関係を示す概略図、第７図は第
４図の装置で得られる検出信号の波形を示すグラ
フ図である。
１０……マスク、１０ａ……窓、１０ｂ……ス
リツト。
Fig. 1 is a schematic diagram showing a position detection device according to an embodiment of the present invention, Fig. 2 is a schematic diagram showing the state of reflection of detection light, and Fig. 3 is a schematic diagram showing the state of reflection of detection light. A graph showing waveforms, Fig. 4 is a schematic diagram showing an example of a conventional device, Fig. 5 is a schematic diagram showing the state of reflection of the detection light in the device of Fig. 4, and Fig. 6 is a diagram showing the detection light and detection pattern. A schematic diagram showing the relationship, and FIG. 7 is a graph diagram showing the waveform of the detection signal obtained by the apparatus of FIG. 4. 10...Mask, 10a...Window, 10b...Slit.
Claims (1)
る検出パターンが形成され移動体に配設されるガ
ラススケールと、このガラススケールの検出パタ
ーンに検出光を照射してその反射光を受光する反
射型光センサと、上記検出パターンに対応した間
隔で透光部と遮光部が繰り返し形成され上記反射
型光センサと上記ガラススケールの間に配設され
たスリツトマスクからなる位置検出装置において
、上記スリツトマスクには、上記反射型光センサ
から検出パターンに向けて出力された検出光を全
量透過する透過部が形成されたことを特徴とする
位置検出装置。 A glass scale is installed on a moving body and has a detection pattern formed by repeating reflective parts and light shielding parts at regular intervals on its surface, and a reflection scale that irradiates detection light onto the detection pattern of the glass scale and receives the reflected light. In a position detection device comprising a type optical sensor and a slit mask disposed between the reflective optical sensor and the glass scale, the slit mask has transparent parts and light blocking parts repeatedly formed at intervals corresponding to the detection pattern. The position detection device is characterized in that a transmitting portion is formed that transmits the entire amount of detection light outputted from the reflective optical sensor toward the detection pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7773688U JPH02618U (en) | 1988-06-14 | 1988-06-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7773688U JPH02618U (en) | 1988-06-14 | 1988-06-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02618U true JPH02618U (en) | 1990-01-05 |
Family
ID=31302701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7773688U Pending JPH02618U (en) | 1988-06-14 | 1988-06-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02618U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06160061A (en) * | 1992-11-26 | 1994-06-07 | Seikosha Co Ltd | Detecting device for position body of rotation |
| WO2005050141A1 (en) * | 2003-11-20 | 2005-06-02 | Mitsubishi Denki Kabushiki Kaisha | Optical encoder |
-
1988
- 1988-06-14 JP JP7773688U patent/JPH02618U/ja active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06160061A (en) * | 1992-11-26 | 1994-06-07 | Seikosha Co Ltd | Detecting device for position body of rotation |
| WO2005050141A1 (en) * | 2003-11-20 | 2005-06-02 | Mitsubishi Denki Kabushiki Kaisha | Optical encoder |
| US7285769B2 (en) | 2003-11-20 | 2007-10-23 | Mitsubishi Denki Kabushiki Kaisha | Optical encoder with reduced reflected light error having a light non-transparent portion with inclined surfaces |
| US7538313B2 (en) | 2003-11-20 | 2009-05-26 | Mitsubishi Denki Kabushiki Kaisha | Optical encoder having a no track portion of an optical scale being placed at a position symmetrical to a light non-transparent portion within an irradiation region of incident light |
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