Direct Imaging of Transient Interference in a Optical Microscopy
... NSOM is used to directly measure the evanescent field on the upper surface of the waveguide. The NSOM technique has been frequently used for optical waveguide characterization in light propagation properties, spatial modes profile, and guided modes interference [2]–[5]. NSOM measurements reported he ...
... NSOM is used to directly measure the evanescent field on the upper surface of the waveguide. The NSOM technique has been frequently used for optical waveguide characterization in light propagation properties, spatial modes profile, and guided modes interference [2]–[5]. NSOM measurements reported he ...
Short-pulse limits in optical instrumentation design for the S
... IR/visible/UV sources with pulse lengths extending down to the few-femtosecond range have stimulated the systematic re-investigation of the performance the performance of many types of optical elements and instruments, including mirrors, multilayers, diffraction gratings, refractive lenses, monochro ...
... IR/visible/UV sources with pulse lengths extending down to the few-femtosecond range have stimulated the systematic re-investigation of the performance the performance of many types of optical elements and instruments, including mirrors, multilayers, diffraction gratings, refractive lenses, monochro ...
Theory of relativistic optical harmonic generation
... polarized input beams could provide valuable data to allow a more complete testing of the understanding of nonlinear optical processes in relativistic plasmas. The model described above can also be used to make predictions of the intensity dependence of the generation of the higher harmonic orders. ...
... polarized input beams could provide valuable data to allow a more complete testing of the understanding of nonlinear optical processes in relativistic plasmas. The model described above can also be used to make predictions of the intensity dependence of the generation of the higher harmonic orders. ...
unit –iii fiber optics and applications part-a 2
... 18. Why is laser much preferred then LED as an optical source? Laser light is much preferred than LED because it is more directional , highly coherent, faster rise time and narrow spectral width than LED. 19. What is meant by LED / give its principles An LED is an abbreviation of light emitting diod ...
... 18. Why is laser much preferred then LED as an optical source? Laser light is much preferred than LED because it is more directional , highly coherent, faster rise time and narrow spectral width than LED. 19. What is meant by LED / give its principles An LED is an abbreviation of light emitting diod ...
Microscopy - Napa Valley College
... refracts light as you focus up and down, which produces something of a rainbow effect as the colors change. However, air bubbles are not of interest in our wet mounts and we’ll ignore them.) Place the yogurt slide on the stage and try to center an area on the slide that is more transparent as you wa ...
... refracts light as you focus up and down, which produces something of a rainbow effect as the colors change. However, air bubbles are not of interest in our wet mounts and we’ll ignore them.) Place the yogurt slide on the stage and try to center an area on the slide that is more transparent as you wa ...
Lasers incorporating 2D photonic bandgap mirrors
... threshold current densities of the best devices, we estimate a modal reflectivity of 50% from the photonic lattice. On one sample, lasers with a dry etched facet instead of a photonic lattice were fabricated next to lasers with photonic lattices. Both lasers had cleaved facets forming the other end ...
... threshold current densities of the best devices, we estimate a modal reflectivity of 50% from the photonic lattice. On one sample, lasers with a dry etched facet instead of a photonic lattice were fabricated next to lasers with photonic lattices. Both lasers had cleaved facets forming the other end ...
In-fiber microchannel device filled with a carbon
... since the first studies of their optical absorption by Kataura et al. were presented in 1999 [1]. The nonlinear saturable absorption and high third-order nonlinearity make CNT-based devices firm candidates to becoming an important component of the next-generation all-optical switches [2] and passive ...
... since the first studies of their optical absorption by Kataura et al. were presented in 1999 [1]. The nonlinear saturable absorption and high third-order nonlinearity make CNT-based devices firm candidates to becoming an important component of the next-generation all-optical switches [2] and passive ...
Dense plasma diagnostics with an amplitude-division soft-x-ray laser
... solution cannot be implemented at all wavelengths (e.g., 46.9 nm, the wavelength of our Ne-like Ar laser), owing to the lack of materials with adequate optical constants for the manufacturing of multilayer beam splitters in some regions of the spectrum. To overcome this problem we have developed a n ...
... solution cannot be implemented at all wavelengths (e.g., 46.9 nm, the wavelength of our Ne-like Ar laser), owing to the lack of materials with adequate optical constants for the manufacturing of multilayer beam splitters in some regions of the spectrum. To overcome this problem we have developed a n ...
Research on the Design of an Optical Information Storage Sensing
... beam focuses on the servo layer for focusing and tracking, while the first-order diffraction beams focuses on the recording layer. The two beams are controlled and focus on the corresponding layers independently when changing the positions of the objective lens and the DOE. Therefore, the zeroth-ord ...
... beam focuses on the servo layer for focusing and tracking, while the first-order diffraction beams focuses on the recording layer. The two beams are controlled and focus on the corresponding layers independently when changing the positions of the objective lens and the DOE. Therefore, the zeroth-ord ...
Lasers-An Overview
... generating and amplifying microwave oscillations based on stimulated radiations. 1954 - Invention of MASER (Microwave Amplification by Stimulated Emission of Radiations). 1958 - Townes & Schawlow and Basov & Prokholov – independently extended the maser concept to optical frequencies i.e. LASER Tow ...
... generating and amplifying microwave oscillations based on stimulated radiations. 1954 - Invention of MASER (Microwave Amplification by Stimulated Emission of Radiations). 1958 - Townes & Schawlow and Basov & Prokholov – independently extended the maser concept to optical frequencies i.e. LASER Tow ...
Lab 14 - FIber Optics Principles and Position Sensor
... detector is linear. For this lab, the absolute power of the laser is not important. You can use "Photodetector Voltage" as a measure of the detected power. Using a large core (about 1mm) fiber optic cable, couple the light from a He-Ne laser into the fiber as shown in Figure 1. Optimize the position ...
... detector is linear. For this lab, the absolute power of the laser is not important. You can use "Photodetector Voltage" as a measure of the detected power. Using a large core (about 1mm) fiber optic cable, couple the light from a He-Ne laser into the fiber as shown in Figure 1. Optimize the position ...
Telescopes for CCD Imaging
... Mirror shift can contribute to this problem. SCT’s aren’t very easy to collimate. “Bob’s knobs” can help make collimation easier. The combination of features described above make the SCT one of the more difficult telescope designs to use in CCD imaging. Quality control in SCT manufacture has been a ...
... Mirror shift can contribute to this problem. SCT’s aren’t very easy to collimate. “Bob’s knobs” can help make collimation easier. The combination of features described above make the SCT one of the more difficult telescope designs to use in CCD imaging. Quality control in SCT manufacture has been a ...
Enhancement of image quality and imaging depth with Airy light
... is greater in the presence of stronger sample-induced aberrations. Finally, we used homogeneous resolution probes in these tissues to quantify absolute depth penetration in cleared samples with each beam type. The Airy light-sheet method extended depth penetration by 30% compared to a Gaussian light ...
... is greater in the presence of stronger sample-induced aberrations. Finally, we used homogeneous resolution probes in these tissues to quantify absolute depth penetration in cleared samples with each beam type. The Airy light-sheet method extended depth penetration by 30% compared to a Gaussian light ...
Generation and application of a high-average- power polarized soft-x-ray laser beam
... measurements as a function of angle was described previously.16 In this setup the mirror is mounted on a computer-controlled rotation stage and illuminated with ⬃0.1-mJ unpolarized laser pulses from a 46.9-nm Ne-like Ar capillary-discharge soft-x-ray laser operating at a repetition rate of 1 to 2 Hz ...
... measurements as a function of angle was described previously.16 In this setup the mirror is mounted on a computer-controlled rotation stage and illuminated with ⬃0.1-mJ unpolarized laser pulses from a 46.9-nm Ne-like Ar capillary-discharge soft-x-ray laser operating at a repetition rate of 1 to 2 Hz ...
de Sénarmont Bias Retardation in DIC Microscopy Introduction
... between orthogonal wavefronts is matched at every point along the surface of the prisms, which are inverted with respect to one another. Translating either prism along the shear axis (perpendicular to the microscope optical axis) produces a wavefront mismatch that is uniform across the microscope ap ...
... between orthogonal wavefronts is matched at every point along the surface of the prisms, which are inverted with respect to one another. Translating either prism along the shear axis (perpendicular to the microscope optical axis) produces a wavefront mismatch that is uniform across the microscope ap ...
Document - DaTARIUS
... are not taken into account. In other words, the individual pits or lands are not taken into account by the servo system. Only an average light level is available for the creation of an error signal. The optical parameter used for generating the radial tracking error signal in single-beam players is ...
... are not taken into account. In other words, the individual pits or lands are not taken into account by the servo system. Only an average light level is available for the creation of an error signal. The optical parameter used for generating the radial tracking error signal in single-beam players is ...
IOSR Journal of Applied Physics (IOSR-JAP)
... Abstract: For 384×288 pixel uncooled micro bolometer (a-Si) focal plane array (FPA) detector an infrared optical system (lenses) has been designed in this paper for work in long wavelength infrared region (LWIR) 8— 12 µm. the design results show that the optimum optical performance can be obtained b ...
... Abstract: For 384×288 pixel uncooled micro bolometer (a-Si) focal plane array (FPA) detector an infrared optical system (lenses) has been designed in this paper for work in long wavelength infrared region (LWIR) 8— 12 µm. the design results show that the optimum optical performance can be obtained b ...
Coherence and Combining Filters
... • Filters made from more than one coating can yield a different amount of substrate autofluorescence depending on how they are oriented ...
... • Filters made from more than one coating can yield a different amount of substrate autofluorescence depending on how they are oriented ...
All students are asked for bringing your own samples which
... The size of the spot formed by the beam on the sample surface sets a fundamental limit on resolution. An SEM cannot resolve features smaller than the spot size. In general, low beam current, short working distance and high accelerating voltage yield the smallest spot. Other factors such as type of s ...
... The size of the spot formed by the beam on the sample surface sets a fundamental limit on resolution. An SEM cannot resolve features smaller than the spot size. In general, low beam current, short working distance and high accelerating voltage yield the smallest spot. Other factors such as type of s ...
Physical optics - Manual (with template)
... concrete physical or qualitative interpretation. In today’s experiment, the wave-like properties of light are examined. Other types of waves such as sound or water waves have long shown the ability to bend around obstacles (diffraction) and to constructively or destructively interfere with each othe ...
... concrete physical or qualitative interpretation. In today’s experiment, the wave-like properties of light are examined. Other types of waves such as sound or water waves have long shown the ability to bend around obstacles (diffraction) and to constructively or destructively interfere with each othe ...
A Green Laser Pointer Hazard
... corresponds to simple back reflection. The two frames of Fig. 6 show images taken with digital (visible) and web (visible + infrared) cameras. The top frame was acquired with an ordinary digital camera, which has a high-quality infrared-blocking filter. It corresponds closely to what would be seen b ...
... corresponds to simple back reflection. The two frames of Fig. 6 show images taken with digital (visible) and web (visible + infrared) cameras. The top frame was acquired with an ordinary digital camera, which has a high-quality infrared-blocking filter. It corresponds closely to what would be seen b ...
Top downloaded Optics Express article for March.
... View Top Downloads from March 2012 Stay current on the latest research by reviewing the most downloaded articles in OSA’s Optics Express in March. Optics Express is an open-access journal so the articles below are freely accessible. ...
... View Top Downloads from March 2012 Stay current on the latest research by reviewing the most downloaded articles in OSA’s Optics Express in March. Optics Express is an open-access journal so the articles below are freely accessible. ...
PDF
... pixel with a spatial resolution limited by the SLM’s pixel size (15 µm x 15 µm). A telescope comprised of two plano-convex lenses is used to expand the 5 mm diameter beam output from the laser to overfill the 512x512 pixel array of the SLM and a second telescope reduces the reflected beam size to fi ...
... pixel with a spatial resolution limited by the SLM’s pixel size (15 µm x 15 µm). A telescope comprised of two plano-convex lenses is used to expand the 5 mm diameter beam output from the laser to overfill the 512x512 pixel array of the SLM and a second telescope reduces the reflected beam size to fi ...
Imaging and Non-imaging System Modeling in ASAP
... lumens, screen illumination uniformity, color balance, color uniformity, and image quality, which are usually expressed as resolution (modulation transfer function (MTF) and image size (magnification)). But if we dig more deeply into the origin and meaning of these requirements, we see that we can r ...
... lumens, screen illumination uniformity, color balance, color uniformity, and image quality, which are usually expressed as resolution (modulation transfer function (MTF) and image size (magnification)). But if we dig more deeply into the origin and meaning of these requirements, we see that we can r ...
Laboratory 1
... in different parts of the field of view, especially when using the higher-powered objectives. A research microscope would have higher quality lenses, and come closer to consistent focus across the entire field. People who use microscopes a lot constantly adjust the fine focus as they work. Changes i ...
... in different parts of the field of view, especially when using the higher-powered objectives. A research microscope would have higher quality lenses, and come closer to consistent focus across the entire field. People who use microscopes a lot constantly adjust the fine focus as they work. Changes i ...
Confocal microscopy
Confocal microscopy is an optical imaging technique for increasing optical resolution and contrast of a micrograph by means of adding a spatial pinhole placed at the confocal plane of the lens to eliminate out-of-focus light. It enables the reconstruction of three-dimensional structures from the obtained images. This technique has gained popularity in the scientific and industrial communities and typical applications are in life sciences, semiconductor inspection and materials science.