Colorimeter and reflectivity measuring method based on multichannel spectrum

A colorimeter based on a multichannel spectrum, comprising:

• a main unit and a calibration box, wherein
• the main unit comprises;
• an integrating sphere, a light source and a main sensor, a detection hole is formed in one side of a top of the integrating sphere, a light-through hole is formed in a side of the integrating sphere, and a measuring port is formed in a bottom of the integrating sphere, the main sensor is arranged outside the detection hole, and the light source is arranged outside the light-through hole;
• the calibration box comprises a housing and a white board arranged at a top of the housing, the white board is correspondingly matched with the measuring port, and the calibration box is connected with the main unit;
• the main sensor is a multichannel spectral sensor;
• the main unit is composed of an upper cover, a light guide ring, a PCB board and a main body successively from top to bottom, wherein a first internal thread arranged inside the upper cover is connected with an external thread arranged outside the light guide ring, threaded fixing holes with a second internal thread formed in the light guide ring are connected with the main body through a connecting screw, and an indicating light source is arranged on the PCB board.