The working principle of grating displacement sensor

The working principle of grating displacement sensor is composed of a pair of gratings in the main grating ( i.e. scale grating ) and Deputy grating (i.e. indicating grating ) relative displacement, the black and white light interference and diffraction ( or under the joint action of light and dark ) Rules fringe pattern, called the moire fringe. After conversion to optoelectronic devices ( or value ) and the electrical signal is converted into a sinusoid fringe, and then after the amplifier, shaping circuit after shaping, obtains two phase 90o sine wave or square wave, into the grating digital readout-instrument count display.

万濠投影仪，万濠全自动影像仪,万濠影像测量仪