Time division multiplexing reflection anisotropy differential optical measurement device and method

• Main Authors: SUI QINGMEI, ZHANG FAYE, JIA LEI, ZHANG LEI, JIANG MINGSHUN, WANG YINA
• Format: Patent
• Language: Chinese; English
• Published: 11.10.2019
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention provides a time division multiplexing reflection anisotropy differential optical measurement device and method. The device comprises a polarizer and an optical chopper; a reflected lightbeam of a sample is split into two beams of linear polarized light via the polarizer; the optical chopper blocks one light beam in the linear polarized light, and selects the other beam of linear polarized light to propagate to be transmitted to an optical path; the time division multiplexing for measuring the reflected light is achieved through collecting signals of different optical paths at different time frames. The device and method provided by the invention are strong in antijamming capability, reliable in performance and convenient to use; due to the utilization of the polarizer, optical chopper and Y-type fiber, the reflective differential information of the sample can be acquired without rotating the sample or the optical element, the introduction of errors is reduced; and the system is strong in antijam