unevenness of exposure

The exposition uniformity and the time stability of the hologram recorded in the photopolymer are studied in experiments,also the effects of isopropanol and drying of hot wind.

本文介绍了红敏光聚合物干板在学生全息实验中的使用情况,实验测定了该干板的曝光均匀性、全息图的稳定性以及异丙醇溶液和热风吹干的作用。

It is pointed out both in aspects of theory and experiment that if the solubility of H 2 in the hydrogen-loaded fiber is lowered and using the technique of uniform UV exposure properly, the thermal stability of LPFG could be improved greatly.

从理论和实验两个方面指出了在长周期光纤光栅的制作过程中若适当地降低长周期光纤光栅的含氢量 ,并灵活地运用均匀紫外曝光技术 ,能够明显地提高长周期光纤光栅的热稳定

UV uniform exposure can effectively vary the coupling characteristics of the annealed long period gratings (LPGs) in hydrogen loaded fiber.

写于载氢光纤上的长周期光纤光栅经过高温退火后 ,对其进行紫外均匀曝光能够有效改变其耦合特性。