Li_Fang_Report
... We all know that the easiest way to detect the cancer, such as breast and prostate lesions, is touching the surface of tissue with your fingers, the cancer lesion can feel a stiff, hard nodule. However, we hope to detect the ‘nodule’ as small as possible, since it is very important for the medical t ...
... We all know that the easiest way to detect the cancer, such as breast and prostate lesions, is touching the surface of tissue with your fingers, the cancer lesion can feel a stiff, hard nodule. However, we hope to detect the ‘nodule’ as small as possible, since it is very important for the medical t ...
Phase Contrast
... •Illumination passes through thick part of Specimen > larger phase retardation ...
... •Illumination passes through thick part of Specimen > larger phase retardation ...
Optical Interferometers
... thickness of the compensator plate and the beamsplitter are the same, both wavefronts pass through the same amount of glass and air, so the pathlength of the light beams in both interferometer arms will be exactly the same. Therefore, two fields will arrive in phase to the observer, and their amplit ...
... thickness of the compensator plate and the beamsplitter are the same, both wavefronts pass through the same amount of glass and air, so the pathlength of the light beams in both interferometer arms will be exactly the same. Therefore, two fields will arrive in phase to the observer, and their amplit ...
(III) Laser Detection of Wave Motion in Solids
... path will continue to propagate and progressively amplify as the light travels back and forth along the path. Emitted light rays that travel in other directions simply leak away and have low amplitude. In essence a light “resonator” is set up, and with each pass the internally reflected light stimul ...
... path will continue to propagate and progressively amplify as the light travels back and forth along the path. Emitted light rays that travel in other directions simply leak away and have low amplitude. In essence a light “resonator” is set up, and with each pass the internally reflected light stimul ...
Variable Geometric Phase Polarization Rotators for the Visible
... p-polarization components of the light acquire different phase shifts upon reflection w14x. As a consequence, after one or more off-plane reflections, linearly polarized light quickly becomes elliptically polarized. There are two ways to correct the phase-shift problem. One is to add dielectric coat ...
... p-polarization components of the light acquire different phase shifts upon reflection w14x. As a consequence, after one or more off-plane reflections, linearly polarized light quickly becomes elliptically polarized. There are two ways to correct the phase-shift problem. One is to add dielectric coat ...
Optics in Confocal Microscopy
... These objectives are the ones most often used for high-resolution confocal work. They have several problems, however. If used with live cells under the coverslip in an aqueous (i.e. low refractive index) medium such as a physiological saline, the PSF deteriorates markedly with distance through the a ...
... These objectives are the ones most often used for high-resolution confocal work. They have several problems, however. If used with live cells under the coverslip in an aqueous (i.e. low refractive index) medium such as a physiological saline, the PSF deteriorates markedly with distance through the a ...
I13-02: Effect of concentration ratio of iron/manganese on coloration
... the source of the glass coloration. Each 3d-transition metal can exist in more than one oxidation or coordination states and normally gives rise to specific absorption spectra [1-3]. Among various transition metal oxides, iron and manganese oxide is very interesting optical properties with redox rea ...
... the source of the glass coloration. Each 3d-transition metal can exist in more than one oxidation or coordination states and normally gives rise to specific absorption spectra [1-3]. Among various transition metal oxides, iron and manganese oxide is very interesting optical properties with redox rea ...
Two-dimensional control of light with light on metasurfaces
... Ideal performance requires a thin film or metasurface of deeply subwavelength thickness that absorbs 50% of a single beam illuminating the structure. Exploiting that the nanostructure of metasurfaces can be carefully engineered to achieve suitable optical properties and, guided by numerical modeling, ...
... Ideal performance requires a thin film or metasurface of deeply subwavelength thickness that absorbs 50% of a single beam illuminating the structure. Exploiting that the nanostructure of metasurfaces can be carefully engineered to achieve suitable optical properties and, guided by numerical modeling, ...
Lecture Note No. 3 Reflection and Refraction (Sections 4.3 to 4.8)
... y =1/ is called the skin depth through which the light intensity drops to 1/3 (~1/e = 1/2.7) of the incident beam intensity (extremely thin in the order of nm for most metals) *Since metal has abundant free electrons ( o k e / m e 0 with k e 0 and 0 ), the expression of refractive ind ...
... y =1/ is called the skin depth through which the light intensity drops to 1/3 (~1/e = 1/2.7) of the incident beam intensity (extremely thin in the order of nm for most metals) *Since metal has abundant free electrons ( o k e / m e 0 with k e 0 and 0 ), the expression of refractive ind ...
Tailored Complex Potentials and Friedel`s Law in Atom Optics
... surface, their relative spatial phase oscillates with a beating period of 32 mm, due to their wavelength difference [10]. This means that by controlling the distance between the atomic beam (5 mm wide) and the mirror surface we can vary the spatial phase between the two superposed crystals of light. ...
... surface, their relative spatial phase oscillates with a beating period of 32 mm, due to their wavelength difference [10]. This means that by controlling the distance between the atomic beam (5 mm wide) and the mirror surface we can vary the spatial phase between the two superposed crystals of light. ...
LABORATORY TECHNIQUES
... Collimating with an optical flat: Place the collimating lens approximately one focal length away from the diverging source (usually the output of a spatial filter). This will give an output beam that is almost collimated. Insert the optical flat, at an angle, in the output beam path and place a whit ...
... Collimating with an optical flat: Place the collimating lens approximately one focal length away from the diverging source (usually the output of a spatial filter). This will give an output beam that is almost collimated. Insert the optical flat, at an angle, in the output beam path and place a whit ...
Measurement of transparent plates with
... interferometer.1 Unwanted interference effects arising from backsurface reflections result in the complex mixture of fringes shown in Fig. 1. The overlapping patterns render ineffective standard techniques in phase-shifting interferometry 共PSI兲, which rely on the analysis of a sequence of interferen ...
... interferometer.1 Unwanted interference effects arising from backsurface reflections result in the complex mixture of fringes shown in Fig. 1. The overlapping patterns render ineffective standard techniques in phase-shifting interferometry 共PSI兲, which rely on the analysis of a sequence of interferen ...
Living specimen tomography by digital holographic
... In the present work, the specimen is observed in a specifically designed chamber, principally composed by two microscope coverslips orthogonal to the optical axis. An aluminum frame maintains the two coverslips 4 mm distant, while fixations assure the watetightness of the chamber. One lateral side o ...
... In the present work, the specimen is observed in a specifically designed chamber, principally composed by two microscope coverslips orthogonal to the optical axis. An aluminum frame maintains the two coverslips 4 mm distant, while fixations assure the watetightness of the chamber. One lateral side o ...
Atchison Eye Models For Correction
... § Relaxed and 7.1 D accommodated forms § For accommodated form lens becomes more curved ant. surface moves forward 0.4 mm, back surface moves away 0.1mm ...
... § Relaxed and 7.1 D accommodated forms § For accommodated form lens becomes more curved ant. surface moves forward 0.4 mm, back surface moves away 0.1mm ...
Ellipsometry Data Analysis: a Tutorial - EECS @ UMich
... “…fitting of parameters is not the end-all of parameter estimation. To be genuinely useful, a fitting procedure should provide (i) parameters, (ii) error estimates on the parameters, and (iii) a statistical measure of goodness-of-fit. When the third item suggests that the model is an unlikely match ...
... “…fitting of parameters is not the end-all of parameter estimation. To be genuinely useful, a fitting procedure should provide (i) parameters, (ii) error estimates on the parameters, and (iii) a statistical measure of goodness-of-fit. When the third item suggests that the model is an unlikely match ...
- vjs.ac.vn
... the particle is partially stable. If the nonlinear refractive coefficient is too high, the trapping condition is not satisfied, i.e. n1 n2 nnl I ...
... the particle is partially stable. If the nonlinear refractive coefficient is too high, the trapping condition is not satisfied, i.e. n1 n2 nnl I ...
Fundamental Limit to Linear One-Dimensional Slow Light Structures
... resonators (including the possibility of ideal dispersive material in the resonators), Tucker et al. give a limit Lnavg / λc . Tucker et al. [7] implicitly assume that resonators can be made with lengths ~ λc / 2 . Such a resonator likely must use high index contrast in the structure, so navg − nmin ...
... resonators (including the possibility of ideal dispersive material in the resonators), Tucker et al. give a limit Lnavg / λc . Tucker et al. [7] implicitly assume that resonators can be made with lengths ~ λc / 2 . Such a resonator likely must use high index contrast in the structure, so navg − nmin ...
Skylights
... Apply primarily to skylight applications designed to provide uniform lighting for commercial or industrial buildings. They refer to manufactured, off-the-shelf skylight components used in commercial applications, commonly referred to as “unit skylights.” Typically simple, rectangular, or linear skyl ...
... Apply primarily to skylight applications designed to provide uniform lighting for commercial or industrial buildings. They refer to manufactured, off-the-shelf skylight components used in commercial applications, commonly referred to as “unit skylights.” Typically simple, rectangular, or linear skyl ...
Anti-reflective coating
An antireflective or anti-reflection (AR) coating is a type of optical coating applied to the surface of lenses and other optical elements to reduce reflection. In typical imaging systems, this improves the efficiency since less light is lost. In complex systems such as a telescope, the reduction in reflections also improves the contrast of the image by elimination of stray light. This is especially important in planetary astronomy. In other applications, the primary benefit is the elimination of the reflection itself, such as a coating on eyeglass lenses that makes the eyes of the wearer more visible to others, or a coating to reduce the glint from a covert viewer's binoculars or telescopic sight.Many coatings consist of transparent thin film structures with alternating layers of contrasting refractive index. Layer thicknesses are chosen to produce destructive interference in the beams reflected from the interfaces, and constructive interference in the corresponding transmitted beams. This makes the structure's performance change with wavelength and incident angle, so that color effects often appear at oblique angles. A wavelength range must be specified when designing or ordering such coatings, but good performance can often be achieved for a relatively wide range of frequencies: usually a choice of IR, visible, or UV is offered.