Intraoral three-dimensional scanning system based on stereo vision using a monocular camera

An intraoral three-dimensional scanner system, comprising a monocular camera;

• wherein the monocular camera consists of one lens, one sensor and a mirror group;
• the mirror group is provided between the lens and an object to be measured and the mirror group comprises a first mirror M2, a second mirror M3, a third mirror M1 and a fourth mirror M4;
• the first mirror M2 and the second mirror M3 are perpendicular to each other;
• a bisector of an angle formed by the first mirror M2 and the second mirror M3 is perpendicular to the lens, and reflecting surfaces of the first mirror M2 and the second mirror M3 face the lens and the sensor;
• and the lens is arranged between the sensor and the mirror group;
• the sensor is configured to receive light beams reflected by the mirror group and passing through the lens;
• an included angle between the third mirror M1 and the bisector is less than 45°, and an included angle between the fourth mirror M4 and the bisector is less than 45°, and
• the third mirror M1 is provided at a side of the first mirror M2 away from the second mirror M3, and the fourth mirror M4 is provided at a side of the mirror M3 away from the first mirror M2;
• the first mirror M2, the second mirror M3, the third mirror M1 and the fourth mirror M4 are located in the same plane.