Reflector bowl and optical system applicable for colorful spotlight

A reflector bowl, characterized in that, the reflector bowl comprises a reflector bowl body having a big end and a small end, wherein the small end of the reflector bowl body is arranged with a light source opening and the big end of the reflector bowl body is opened and serves as a light outlet, wherein the reflector bowl body has a square shaped cross section, and an inner surface of the reflector bowl body is a smooth mirror surface;

• wherein two reflector bowl bodies are connected together to form one joint body, the light outlets of the two reflector bowl bodies of the joint body lie in the same plane, and two ends of the joint body are arranged with a joint part for connection of the joint body, the joint parts are a concave joint part and a convex joint part, the concave joint part and the convex joint part are alternately arranged, and the concave joint part and the convex joint part of one joint body correspond to the convex joint part and the concave joint part of another joint body.