Abstract: A calibration module and a use method therefor. The calibration module comprises: a plurality of observation planes, wherein among the plurality of observation planes, planes where at least two observation planes are located intersect, and there is a determined spatial position relationship between the plurality of observation planes. Each observation plane is provided with an observation area, and each observation area is provided with a corresponding calibrated BRDF value. By means of providing a polyhedral calibration module, the accuracy of measurement of the attitude of the calibration module and the incident angle of a light source is improved, such that the accuracy of testing of a BRDF characteristic of a surface of an object to be tested is improved.

Abstract: A scaling module, and a calibration method and use method therefore, relating to the technical field of reflection detection. The scaling module comprises a three-dimensional scaler (1); the three-dimensional scaler (1) comprises a microwave reflective layer (11) and an optical reflective layer (12); the microwave reflective layer (11) has a first scaling surface, and the optical reflective layer (12) has a second scaling surface; the first scaling surface is divided into a plurality of first scaling areas, the plurality of second scaling surfaces are divided into a plurality of second scaling areas, and the plurality of first scaling areas and the plurality of second scaling areas are arranged in a one-to-one correspondence manner; the microwave reflective layer (11) is used for reflecting microwaves emitted by a synthetic aperture radar, and the optical reflective layer (12) is used for reflecting light to an optical imaging device.