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为了提高计量光栅的分辨率.目前国内外通常采用电气细分,如:电阻链分相、电阻链幅值分割等方法,使用两路相位差为π/2电角度或三路相位差分别为(2π)/3电角度的正弦信号。为了保证细分的均匀性,减小电气细分的误差,采用了诸如“光学滤波器”等措施,来提高光栅信号波形的正弦性,并对光栅系统的光机电调整和使用等提出了较高
In order to improve the resolution of the measuring grating, electric subdivision is usually used at home and abroad, such as: resistive chain phase separation, resistance chain amplitude segmentation and other methods, the use of two phase difference π / 2 electrical angle or three-phase phase difference (2π) / 3 electrical sinusoidal signal. In order to ensure the uniformity of the subdivision and reduce the error of the electrical subdivision, some measures such as “optical filter” are adopted to improve the sinusoidality of the raster signal waveform, and the optical mechanical and electrical adjustments and uses of the raster system are proposed high