Method and device for detecting collimation of light beams

The invention discloses a method and device for detecting collimation of light beams. The method comprises the following steps of: filtering light beams emitted from a laser, collimating and adjusting the light beams through a collimation lens, enabling the adjusted light beams to enter a rhombic prism to generate at least one total reflection, then receiving outgoing light beams by a photoelectric detector, transmitting a signal to a detector drive and display unit, analyzing the signal and displaying a normalized profile light intensity distribution curve of light beams to be detected, judging whether the light beams are collimated according to the normalized profile light intensity distribution curve, and determining whether non-collimated light beams are converged or diffused. The device for realizing the method comprises the laser, single mode fiber, the collimation lens, the rhombic prism, the photoelectric detector, the detector drive and display unit. By means of the method and device, the sensitivity