排序方式: 共有22条查询结果,搜索用时 0 毫秒
1.
2.
3.
用于微型光刻技术中的多数紫外线(UV)或深紫外线激光器,无论是基于气体的准分子或二极管泵浦固态 (DPSS) 激光器, 其输出频谱均较宽.与此同时, 能传送紫外或深紫外光的多数光学材料均具有较高度频散性(即它们的折射率,n(λ), 随波长λ变化) .在这种情况下构建一台紫外干涉仪比那拥有狭窄光谱的激光和几乎恒定折射率的光学材料的情况要复杂得多.本文描述一项激光干涉技术,据此可以补偿光学材料的高频散性,从而构建传统意义上所定义的相干长度之外的激光干涉仪.给出理论上的陈述,并提供初步实验结果.本文最后讨论了此情况下干涉条纹的对比度、激光相干长度, 以及如何控制光源的时域不稳定性和空间不均匀性的方法. 相似文献
4.
5.
6.
7.
8.
用于微型光刻技术中的多数紫外线(UV)或深紫外线激光器,无论是基于气体的准分子或二极管泵浦固态(DPSS)激光器,其输出频谱均较宽。与此同时,能传送紫外或深紫外光的多数光学材料均具有较高度频散性(即它们的折射率,n(λ),随波长λ变化)。在这种情况下构建一台紫外干涉仪比那拥有狭窄光谱的激光和几乎恒定折射率的光学材料的情况要复杂得多。本文描述一项激光干涉技术,据此可以补偿光学材料的高频散性,从而构建传统意义上所定义的相干长度之外的激光干涉仪。给出理论上的陈述,并提供初步实验结果。本文最后讨论了此情况下干涉条纹的对比度、激光相干长度,以及如何控制光源的时域不稳定性和空间不均匀性的方法。 相似文献
9.
本文介绍了半导体激光器的典型特性,探讨了用其相干长度进行干涉计量的新方法,并进行了眼球光学长度的测量的实验。 相似文献
10.
Flexible insect wings deform passively under the periodic loading during napping flight. The wing flexibility is considered as one of the specific mechanisms on improving insect flight performance. The constitutive relation of the insect wing material plays a key role on the wing deformation, but has not been clearly understood yet. A viscoelastic constitutive relation model was established based on the stress relaxation experiment of a dragonfly wing (in vitro). This model was examined by the finite element analysis of the dynamic deformation response for a model insect wing under the action of the periodical inertial force in flapping. It is revealed that the viscoelastic constitutive relation is rational to characterize the biomaterial property of insect wings in contrast to the elastic one. The amplitude and form of the passive viscoelastic deformation of the wing is evidently dependent on the viscous parameters in the constitutive relation. 相似文献