首页>
外国专利>
Diffraction-type optical encoder with improved detection signal insensitivity to optical grating gap variations
Diffraction-type optical encoder with improved detection signal insensitivity to optical grating gap variations
展开▼
机译:衍射型光学编码器,对光栅间隙变化的检测信号灵敏度更高
展开▼
页面导航
摘要
著录项
相似文献
摘要
In an optical encoder using a collimated lighting system, an index scale is inclined toward a main scale by a predetermined value. With this arrangement, a component of variation in the detection signal due to variations in the grating gap can be offset or integrated to be removed from a geometric image of the first grating in the detection signal, whereby the dependence of an S/N ratio of the detection signal on the grating gap can be avoided.
展开▼