Photoelectric encoder, scale therefor and method for manufacturing the same
一种光电编码器、制造方法的技术,应用在仪器、转换传感器输出、采用光学装置传递传感构件等方向,能够解决缺乏信号强度等问题,达到提高信号强度、提高S/N、加工精确度高的效果
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[0021] An embodiment of the present invention will now be described in detail with reference to the accompanying drawings.
[0022] figure 1 is a perspective view showing a schematic structure of a photoelectric encoder according to an embodiment of the present invention. The photoelectric encoder 1 includes a main scale 10 , an index scale 20 , a light source 30 and a light receiving area 40 .
[0023] The main scale 10 extends along the measuring axis. The index scale 20 is arranged to move relative to the main scale 10 . The light source 30 projects light onto the main scale 10 through the index scale 20 . The light receiving area 40 receives light emitted from the light source 30 and reflected from the main scale 10 through the index scale 20 . The main scale 10 and the index scale 20 respectively have a protrusive strip 12 and marks 22 serving as graduations formed with a predetermined pitch. The position of the index scale 20 relative to the main scale 10 is detecte...
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