Thin convex lens focal length measuring device and method based on electro-optical modulation

• Main Authors: YANG JINGYU, QI XINYUE, HAN HUIJING, SHI XINGJUN, ZUO YUCHAO
• Format: Patent
• Language: Chinese; English
• Published: 21.09.2021
• Subjects: ADVERTISING; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND,DEAF OR MUTE; CRYPTOGRAPHY; DIAGRAMS; DISPLAY; EDUCATION; EDUCATIONAL OR DEMONSTRATION APPLIANCES; GLOBES; MEASURING; PHYSICS; PLANETARIA; SEALS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

The invention belongs to the technical field of optical lens focal length measurement, and particularly relates to a thin convex lens focal length measurement device and method based on electro-optical modulation. An electric signal is used for modulating a light source to enable the light source to emit light with a modulation signal, and after the light passes through a to-be-measured lens, a photoelectric conversion module converts the received light signal into an electric signal, the signal is demodulated into an original electric signal through a demodulation module, and the original electric signal is displayed on an oscilloscope; the distance between the to-be-measured lens and the light source is adjusted, the change of the amplitude of the electric signal is observedby using an oscilloscope, and when the maximum amplitude of the electric signal is observed, the distance between the to-be-measured lens and the light source is the focal length of the to-be-measured lens; knowledge points of optics, el