LI Hao-nan, ZHAO Dong-e, FAN Xiao-yi. Study on divergence characteristics of glass microbeads from retroreflective screen[J]. 2019, (3): 14-16. DOI: 10.13873/J.1000-9787(2019)03-0014-03.
In order to test the divergence characteristics of glass bead retroreflective screen
a mathematical model is built and simulated using ZEMAX
test system is set up. The system uses a complementary metal oxide semiconductor( CMOS) high-speed camera to shoot the laser spot at 40 cm and the divergence spot size at 20 cm after being reflected by the retroreflector. The two spot images are processed and the divergence angle of the retroreflector is calculated according to the mathematical model
the divergence angle is 0. 598°. The experimental result proves that the method is reasonable and effective
and has certain practical value for the study on the characteristics of the retroreflective screen.