Phase type liquid crystal grating with electrically-controlled continuous tuning diffraction spot positions and manufacturing method of phase type liquid crystal grating

The invention belongs to the technical field of gratings, and particularly provides a phase type liquid crystal grating with electrically-controlled continuous tuning diffraction spot positions and a manufacturing method of the phase type liquid crystal grating. The phase type liquid crystal grating comprises an upper substrate and a lower substrate opposite to the upper substrate. The upper substrate comprises upper substrate glass, a comb-like electrode layer and an upper orientation layer which are arranged in sequence. The lower substrate comprises lower substrate glass, a comb-like electrode layer and a lower orientation layer. The portion between the upper orientation layer and the lower orientation layer is filled with nematic phase liquid crystals; the inner sides of the upper and lower glass substrates are plated with transparent conducting film indium tin oxide electrode films, the indium tin oxide electrode films are manufactured into the first comb-like electrode and the second comb-like electrode