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辐照度与光强不是同一物理量 总被引:1,自引:0,他引:1
本文指出了目前一些光学教科书中关于辐照度与光强概念的混淆,讨论了两物理量的区别和它们在光学中共同存在的必要性. 相似文献
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EFFECT OF LIGHT-INDUCED SCATTERING ON DIFFRACTION EFFICIENCY IN PHOTOREFRACTIVE CRYSTALS 总被引:1,自引:0,他引:1 下载免费PDF全文
The coupled wave equations and their analytic solutions in photorefractive crystals are presented for the case of two-beam writing, while the light-induced scattering is considered, Using this result, the diffraction efficiency for each writing beam is discussed in doped KNSBN crystals with unidirectional fan, which is explained theoretically and verified exper-imentally. 相似文献
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