Contrast improvement in Fourier-domain optical coherence tomography through time gating [0.03%]
傅里叶域光学相干层析成像的时间门控对比度增强方法
Matthew S Muller,James M Fraser
Matthew S Muller
Time-gated (TG) Fourier-domain optical coherence tomography (FDOCT) exploits interferometric imaging with incoherent gating to filter out unwanted backreflections and improve contrast. The system uses sum-frequency generation with a variabl...
John R Valenzuela,Jeffrey A Fessler
John R Valenzuela
In the field of imaging polarimetry Stokes parameters are sought and must be inferred from noisy and blurred intensity measurements. Using a penalized-likelihood estimation framework we investigate reconstruction quality when estimating int...
Contrast, constancy, and measurements of perceived lightness under parametric manipulation of surface slant and surface reflectance [0.03%]
基于参数化设置的表面倾斜和反光度的感知亮度测量及恒常性研究
Sarah R Allred,David H Brainard
Sarah R Allred
Across many scenes, local contrast provides a valid cue to surface reflectance, but it is not the only such cue. To generalize beyond theories of lightness that rely exclusively on local contrast, we need to know which other potential cues ...
S Campbell,L C Botten,R C McPhedran et al.
S Campbell et al.
Slanted lamellar gratings made of dielectric materials are considered, used in conical diffraction mounts. We extend the modal method for slanted lamellar gratings from classical to conical incidence, develop fully generalized Fresnel matri...
Samit Barai,Anurag Sharma
Samit Barai
A new set of basis functions based on truncated Gaussian wavelets is proposed for optical waveguide analysis using the well-known Galerkin method. A spatially limited Gaussian wavelet train is formed by judiciously truncating the tails of G...
Propagation of partially coherent flat-topped beams in uniaxial crystals orthogonal to the optical axis [0.03%]
部分相干扁顶光束在与光轴正交的一轴晶体中的传输特性研究
Dajun Liu,Zhongxiang Zhou
Dajun Liu
The propagation of partially coherent flat-topped beams in uniaxial crystals orthogonal to the optical axis is investigated. Analytical propagation formulas for partially coherent flat-topped beams propagating through uniaxial crystals orth...
Performance dependence of hybrid x-ray computed tomography/fluorescence molecular tomography on the optical forward problem [0.03%]
基于光学正问题的混合X射线CT/荧光分子断层融合成像性能研究
Damon Hyde,Ralf Schulz,Dana Brooks et al.
Damon Hyde et al.
Hybrid imaging systems combining x-ray computed tomography (CT) and fluorescence tomography can improve fluorescence imaging performance by incorporating anatomical x-ray CT information into the optical inversion problem. While the use of i...
Héctor I Pérez,Claudio I Valencia,Eugenio R Méndez et al.
Héctor I Pérez et al.
We study the transmission of diffuse light through thick slits. For perfectly conducting slits and in-plane s-polarized illumination, the transmittance curves present a staircaselike behavior as a function of the aperture width, where the s...
Signal-to-noise-ratio limit to the depth-of-field extension for imaging systems with an arbitrary pupil function [0.03%]
任意瞳孔函数成像系统衍射深度_of_场的信号噪声比限制
Saeed Bagheri,Paulo E X Silveira,George Barbastathis
Saeed Bagheri
We discuss the limit of the depth-of-field (DOF) extension for an imaging system using aspheric surfaces. In particular we consider an imaging system with an arbitrary pupil function and present the rigorous tradeoff between the DOF of the ...
Yoni De Witte,Matthieu Boone,Jelle Vlassenbroeck et al.
Yoni De Witte et al.
When a very-low-absorbing sample is scanned at an x-ray computed tomography setup with a microfocus x-ray tube and a high-resolution detector, the obtained projection images contain not only absorption contrast but also phase contrast. Whil...