Underwater point source polarized light detection device and heading angle measurement method

An underwater point source polarized light detection device, comprising

• a base,
• a rotating detection platform provided on the base, and
• a first detection module, a second detection module, and a third detection module provided on top of the rotating detection platform, wherein:
• the first detection module is configured to receive and detect zenith polarized light, the second detection module is configured to receive and detect zenith right-side polarized light, and the third detection module is configured to receive and detect zenith left-side polarized light,
• each of the first, the second, and the third detection modules comprises a pair of polarization analyzing channels with transmission axes thereof perpendicular to each other,
• the second and the third detection modules are positioned such that polarized light detection directions thereof are bilaterally symmetric in the same plane about a zenith polarized light detection direction and that an included angle between each of the polarized light detection directions and the zenith polarized light detection direction does not exceed 5°, and the rotating detection platform is configured to be rotatable for 360° about an axis of the zenith polarized light detection direction, and
• each polarization analyzing channel comprises a polarization analyzer, and a light intensity detector, and a voltage detector that is electrically connected to the light intensity detector.