Point light source knife edge integration module of schlieren imaging system

The utility model discloses a spot light source knife edge integration module of a schlieren imaging system, which comprises an integration outer shell, a main light source and a small hole are arranged on the integration outer shell, the main light source and the small hole form a spot light source, a knife edge is further arranged on the integration outer shell, and the knife edge is arranged above the main light source. The main light source, the small hole and the knife edge are integrated in the middle of the integrated outer shell, the main light source and the small hole form a point light source, light emitted by the point light source irradiates the concave reflector through a transparent sample in a test area, and then the light is reflected through the concave reflector. After the reflected light passes through the transparent sample in the test area, a half of the reflected light is cut off by the knife edge at the 2f position, the remaining reflected light reaches the camera through the lens for