Double-beam included angle self-compensating roll angle measuring device and method

The invention discloses a double-beam included angle self-compensation roll angle measuring device and method, the measuring device is composed of a transmitting end and a receiving end, the transmitting end comprises a laser, a first spectroscope, a second spectroscope, a third spectroscope, a first reflector, a second reflector, a Wollaston prism, a first four-quadrant photodiode and a second four-quadrant photodiode, a first photodiode and a second photodiode; the receiving end comprises a polarization splitting prism, a third reflector, a first rectangular prism and a second rectangular prism; the receiving end is installed on a measured object. According to the invention, a roll angle measurement method based on double collimated light beams and a roll angle measurement method based on polarization are combined, and a designed roll angle compensation calibration light path based on polarization is applied to a roll angle measurement system based on double collimated light beams, so that the real-time mea