Laser beam quality measuring device and method

• Main Authors: ZHU XIAO, ZHU GUANGZHI, ZHANG ZHENG, WANG HAILIN
• Format: Patent
• Language: Chinese; English
• Published: 18.10.2022
• Subjects: MEASURING; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

The invention discloses a laser beam quality measurement device and method, and belongs to the technical field of laser beam quality measurement, and the device comprises a spectroscope, a first imaging lens, a first observation camera, a Dove prism, a laser focusing lens, a laser scattering medium, a second imaging lens, and a second observation camera. An incident laser beam is divided into two beams by the spectroscope, and a reflected laser beam is irradiated to the first observation camera through the first imaging lens, so that the light intensity distribution on the cross section of the incident laser beam is observed; the transmission laser beam firstly enters the Dove prism, is focused into the laser scattering medium through the laser focusing lens after being emitted from the Dove prism, and is scattered by the scattering medium, and the scattering profile of the focused laser beam near the focus is imaged on the second observation camera through the second imaging lens; the light beam quality of t