Detection device of continuous phase plate

The utility model relates to a detection device for a continuous phase plate. The detection device comprises a laser light source, a first lens, a second lens, a first diaphragm, a phase plate fixing structure, a third lens, a fourth lens, a first receiving device and a second receiving device. The laser light source, the first lens, the second lens, the first diaphragm, the phase plate fixing structure, the third lens and the first receiving device are sequentially arranged in the light beam emitting direction of the laser light source, the structure is simple, and wavefront indexes of penetrating light beams are detected. The laser light source, the first lens, the second lens, the first diaphragm, the optical wedge, the phase plate fixing structure, the third lens, the second diaphragm and the first receiving device are sequentially arranged in the light beam emission direction of the laser light source, the optical wedge is obliquely arranged, and the fourth lens and the second receiving device are sequen