The mode discrimination and loss characteristics of unstable optical resonators with higher Fresnel number are analysed using theories of geometric-optics and interferometer.
As it is well known, the ultraviolet rays can be widely applied to disinfection, physical treatment, detdctive discrimination and exposure optical carving etc.
紫外线的应用很广泛，如紫外线杀菌消毒，紫外线理疗，紫外线荧光分析和鉴别侦破，紫外线曝光光刻等。
3
The experiment results of optical fiber detection show the system can successfully perform the defect detection of optical fibers. Furthermore, it has higher discrimination comparing with the CJTC.