In a digital holographic microscopy (DHM) system, different microscope objectives (MOs) will introduce phase distortions and thus lead to measurement errors. To address this problem, we present simple flexible method compensate all by introducing an electrically tunable lens (ETL) in the reference arm for DHM system with multiple MOs. By exactly controlling external currents of ETL, can change wave front match introduced MOs without complex alignment or additional numerical postprocessing...

Tomographic imaging allows for the cross-sectional of specimen, whereas single-pixel can produce image only with a spatial non-resolved detector. Here we propose compact tomographic system combining imaging. This approach uses digital micromirror device (DMD) to encode information specimen and employs an array detectors record light signals from different directions. For each detector, retrieve unique perspective angle. Based on retrieved images, realize imaging, such as intensity images...

Background. The effect of mycophenolate mofetil (MMF) and sirolimus (rapamycin, RAPA) mono- combination-therapy was examined in prevention acute heart, pancreas, kidney allograft rejection reversal ongoing heart the rat. Methods. Both drugs were administered orally for up to 30 days. Eleven groups (n=6) involved first part allografting model. Brown Norway (RT1n) Lewis (RT11) combination used pancreas transplantation models, whereas Buffalo (RT1b) Wistar Furth (RT1u) Results. naive control...

To increase the measurement range of 3D microscopy, Scheimpflug adjustment, in which imaging plane is tilted with respect to telecentric lens plane, often employed. However, inclined will introduce certain distortion captured image, further affects accuracy reconstruction result. In this paper, a model was derived based on geometric optics theory. With it, caused by condition can be effectively corrected. Experimental results presented demonstrate feasibility and validity proposed method.

In phase-measuring profilometry, the lens distortion of commercial projectors may introduce additional bending carrier phase and thus lead to measurement errors. To address this problem, paper presents an adaptive fringe projection technique in which projected patterns is modified according projector distortion. After projecting these patterns, induced by eliminated. Experimental results demonstrate method be effective efficient suppressing for profilometry. More importantly, does not need...

We propose and fabricate a novel ring-core Ytterbium-doped fiber (RCYDF) with depressed inner core. The experiment demonstrates that the could effectively increase mode competitiveness of LP<sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</sub> while attenuating fundamental (LP<sub xmlns:xlink="http://www.w3.org/1999/xlink">01</sub>) mode. Meanwhile, we overlap factor ratio (OFR) to characterize high-order core...

Background. Our previous studies confirmed that tacrolimus (FK506) and sirolimus [rapamycin (RAPA)], in combination, are not antagonistic but synergistic the prolongation of heart small bowel grafts rodent. The aim this study was to confirm further effect combined FK506 RAPA more clinically relevant model, kidney transplantation monkeys. Methods. A total 60 male Vervet monkeys were randomly assigned 10 groups (n≥5). Monkeys with renal allografts treated different doses and/or orally for...

Stitching interferometry is a common method for measuring the figure error of high numerical aperture optics. However, subaperture measurement usually requires fringe-nulling routine, thus making stitching procedure complex and time-consuming. The challenge when surface without routine that rays no longer perpendicularly hit surface. This violation null-test condition can lead to fringe density introduce high-order misalignment aberrations into result. paper demonstrates be characterized by...

Light-field microscopy is a scanless volumetric imaging technique. Conventional color light microscope employs micro-lens array at the image plane and samples spatial, angular, information by pixelated two-dimensional (2D) sensor (such as CCD). However, space bandwidth product of 2D fixed value determined its parameters, leading to trade-offs between resolutions. In addition, inherent chromatic aberration also reduces viewing quality. Here we propose full-color light-field via single-pixel...

We propose Fourier microscopy based on single-pixel imaging, which uses structured light to computationally illuminate a sample and two-dimensional (2D) pixelated detector capture the spectrum image in back focal plane of objective. The spectra collected by different pixels correspond waves diffracted at angles. Therefore, regrouping 2D detector, we built coded detectors with shapes detect spectra. Then, reconstructed multi-mode images using imaging method for dynamic observations. These...

Stitching interferometry is an attractive method for measuring optics with large apertures. However, existing stitching algorithms are not suitable cylindrical optics, because the misalignment aberrations in more complicated than those plane, spherical and aspherical measurements. This paper presents a algorithm angular With it, we use five (i.e. piston, tilt, tip, defocus twist) to describe possible misalignments of tested surface build model. Using this model allows us calculate relative...

Interferometry with a null corrector can be used to test cylindrical surfaces. The requirement for accurate measurement is fringe pattern. When the tested surface not perfect or seriously misaligned, nonzero pattern might obtained. As result, high-order misalignment aberrations (e.g., coma and spherical aberration) are introduced into measurement. sources types of analyzed by orthogonal Legendre polynomials. Based on analysis, mathematical model was proposed estimate aberrations. Then...

Since the cylinder surface is closed and periodic in azimuthal direction, traditional stitching interferometry cannot be used to yield 360° form map. This paper describes a full based on first-order approximation of cylindrical coordinate transformation. First, it introduces projection, which allows us determine overlap region without ambiguity. Second, relationship between variations radial coordinates movement errors rotational stage derived from Based this relation, model built connect...

The polydactylous rat strain (PD/Cub) is a highly inbred (F > 90) genetic model of metabolic syndrome. aim this study was to analyze the architecture derangements found in PD/Cub and assess its dynamics time response diet medication. We derived x BN/Cub (Brown Norway) F2 intercross population 149 male rats performed profiling genotyping multiple levels linkage statistical analyses at five different stages ontogenesis after high-sucrose feeding dexamethasone administration challenges....

The removal of misalignment aberrations is a key problem in the null test cylindrical surfaces. Although quadratic polynomial with two variables and orthogonal Chebyshev polynomials have been used to separate from extracted phase data, there no physical meaning corresponding coefficients. Additionally, Runge phenomenon may occur when high-order are employed. In this paper, all possible caused by adjustment errors were analyzed. Based on first-order approximate principle, mathematical models,...

Measurement of steep acylindrical surface has the difficulty with respect to its large localized slope, which may lead irresolvable fringe densities in off-axis subapertures. To address this problem, we analyze departure subapertures, and propose a measurement strategy by yawing cylinder null. When null is yawed different angles, variable mounts wavefronts are generated compensate most aberrations for Thus, drastically reduced within vertical dynamic range interferometers. connect all...

There are some limitations in null test measurements stitching interferometry. In order to meet the conditions, moving distance between sub-apertures often deviates from theoretical preset distance, which leads a position deviation of when measured. To overcome this problem, an algorithm for data processing is proposed paper. An optimal estimation used update their positions, and then new overlapped region obtained again optimized. This process repeated until converges acceptable tolerance,...

Background. In nonprimates, organ allografts are often not rejected after withdrawal of immunosuppression.In this study, we examined whether such a phenomenon also occurs in primates. Methods. Vervet monkeys were transplanted with renal and treated for 60 days tacrolimus, or tacrolimus plus sirolimus. The drugs totally withdrawn on day 61. survival the was monitored, their response to donor- third party-derived alloantigens vivo vitro. Results. majority (80–100%) grafts survived at least...

Due to limited data transmission bandwidth and storage space, it is challenging perform fast-moving objects classification based on high-speed photography for a long duration. Here we propose single-pixel method with deep learning objects. The scene image modulated by orthogonal transform basis patterns, the light signal detected detector. Thanks property that natural images are sparse in domain, used small number of patterns discrete-sine-transform obtain feature information classification....