An optical system for endoscopes for which the corrections of the geometrical optical aberrations for multiple wavelengths meet the diffraction limit of the optical system. The optical system is categorized by lens groups. The glass selection for each of these lens groups uses the Hartmann Dispersion...
中文:衍射极限;英文:diffraction limit 中文:阿贝衍射极限;英文:Abbe diffraction limit 中文:杨氏衍射;英文:Young’s diffraction 中文:拉曼-奈斯声光衍射;英文:Raman-Nath acousto-optic diffraction 中文:布拉格声光衍射;英文:Bragg acousto-optic diffraction ...
1.Sub-diffraction limitspots in LiNbO_3 crystal ablated by femtosecond laser have been obtained.通过扫描电镜和原子力显微镜观察了烧蚀点的形貌特征,首次发现利用单束飞秒激光脉冲对LiNbO3晶体烧蚀,可以得到超衍射极限的烧蚀点,当聚焦光斑直径约为2μm、能量为170nJ的单脉冲飞秒激光作用时,烧蚀点的直径约为400nm...
Assuming that the lines of wavelength λ± 1/2δλ will just be resolved when the maximum of the one wavelength coincides with the first minimum of the other (cf. p. 334) we have on the limit of resolution in the mth order, δp = δ'p, i.e. (14)λΔλ=|m|N. Thus, the re...
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Formula (60.5) solves our problem of determining the light intensity as a function of d. The quantity I0 is the intensity in the illuminated region at points not too near the edge of the shadow; more precisely, at those points with w ≫ 1 (C (∞) = S(∞) = 12 in the limit w...
Planar optical lenses are fundamental elements of miniaturized photonic devices. However, conventional planar optical lenses are constrained by the diffraction limit in the optical far-field due to the band-limited wavevectors supported by free-space and
The ability of light beams to rotate nano-objects has important applications in optical micromachines and biotechnology. However, due to the diffraction limit, it is challenging to rotate nanoparticles at subwavelength scale. Here, we propose a method to
15, while the abrasion index is affected if the Lc values exceed a specific limit, which means the coke will abrade when the degree of graphitization reaches a higher level [67]. However, the bridges or interconnections between the domains could not be detected by XRD, which determines the ...
The resulting general expression of the diffraction intensities is then compared to available analytical formulae in the Raman-Nath limit and in the Bragg regime. We think that this formalism can be fruitfully extended to study many important questions....