| 摘要 |
An optical shaft angle encoder uses novel slit emitters having a long, narrow, configuration coupled with collimation lenses to utilize emitted light beams having an improved degree of collimation in an axis perpendicular to radial axes of a rotating code wheel and, thereby, to provide a higher quality generated electrical waveform which is used to describe shaft rotation. The slit emitters are narrowed to improve collimation uniaxially and lengthened to increase the total power of the emitted light.
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