Jie Shu,Xin Li,Henk F Arnoldus
Jie Shu
The energy flow lines (field lines of the Poynting vector) for radiation emitted by a dipole are in general curves, rather than straight lines. For a linear dipole the field lines are straight, but when the dipole moment of a source rotates...
Scintillation index of modified Bessel-Gaussian beams propagating in turbulent media [0.03%]
涡旋Bessel-Gauss光束在大气湍流中传输的闪烁指数研究
Halil T Eyyuboğlu,Yahya Baykal,Emre Sermutlu et al.
Halil T Eyyuboğlu et al.
The scintillation index is formulated for modified Bessel-Gaussian beams propagating in weakly turbulent media. Numerical calculations applied directly to the derived triple integral show that, for off-axis positions, the modified Bessel-Ga...
Partially coherent illumination in full-field interferometric synthetic aperture microscopy [0.03%]
全场干涉合成孔径显微镜中的部分相干照明
Daniel L Marks,Brynmor J Davis,Stephen A Boppart et al.
Daniel L Marks et al.
A model is developed for optical coherence tomography and interferometric synthetic aperture microscopy (ISAM) systems employing full-field frequency-scanned illumination with partial spatial coherence. This model is used to derive efficien...
Steen G Hanson,Harold T Yura
Steen G Hanson
We consider the statistics of the spatially integrated speckle intensity difference obtained from two separated finite collecting apertures. For fully developed speckle, closed-form analytic solutions for both the probability density functi...
Optimized effective permittivity to improve imaging resolution of multilayered structures in the infrared [0.03%]
优化有效介电常数以提高红外多层结构成像分辨率
Xuan Li,Fei Zhuang,Christian V Köhnenkamp
Xuan Li
Two periodic structures with different effective impedances, both comprising alternate layers of a positive and a negative permittivity material, are considered in the infrared. We find that the Fabry-Perot resonance effect periodically inf...
Reflectance and transmittance model for recto-verso halftone prints: spectral predictions with multi-ink halftones [0.03%]
适用于图文并置网点印刷的正反面反射率和透射率模型：多色油墨网点的光谱预测
Mathieu Hébert,Roger David Hersch
Mathieu Hébert
We extend a previously proposed spectral reflectance and transmittance prediction model for recto-verso prints to the case of multi-ink halftones. The model takes into account the multiple reflections and the lateral propagation of light wi...
Guoquan Zhou
Guoquan Zhou
Lorentz-Gauss beams are introduced to describe certain laser sources that produce highly divergent beams. The fractional Fourier transform (FRFT) is applied to treat the propagation of Lorentz-Gauss beams. Based on the definition of convolu...
Xiang Zhang,Jie Yang
Xiang Zhang
Statistical analysis is widely used for moving object detection from video sequences, and generally it assumes that the recent segmentations are the desirable samples. However, we think the recent segmentations are not desirable for the det...
Ray tracing of an aspherical lens with antireflective subwavelength structured surfaces [0.03%]
抗反射亚波长结构表面非球面透镜的光线追迹
Akio Mizutani,Yu Kobayashi,Akira Maruyama et al.
Akio Mizutani et al.
A method of ray tracing for an aspherical lens with subwavelength periodic structured surfaces has been developed. The ray tracing in the antireflective subwavelength structure is based on the group velocity of the Bloch wave. Transmittance...
Rigorous expressions for the Fresnel equations at interfaces between absorbing media [0.03%]
吸收介质界面的弗勒森方程的严格表达式
Hideki Maezawa,Hiroshi Miyauchi
Hideki Maezawa
When conventional Fresnel theory is applied to absorbing multilayer systems, a slight discrepancy with respect to the principle of conservation of energy arises. Here we solve this long-perceived problem and present rigorous expressions for...