Polarization BRDF characteristic measuring device and method

The invention discloses a polarization BRDF characteristic measuring device and method, belongs to the technical field of optical measurement, and aims at solving the problems that an existing BRDF or polarization BRDF is low in measuring speed and low in measuring efficiency. According to the scheme, a laser light source at a second focus emits laser which vertically penetrates through a circularly polarized light generating system and a polarizing system, the circularly polarized light generating system converts the laser emitted by the laser light source into circularly polarized light, and the polarizing system quantitatively changes the polarization state of the circularly polarized light to form incident light for measurement; transmission light of incident light passing through the semi-reflecting and semi-transmitting plane mirror is reflected by the ellipsoid reflector for the first time and irradiates to the surface of a to-be-measured sample at a first focus, reflected light waves on the surface of