Profilometer - Department of Mechanical Engineering
... Acceptance & Easy to Use Surface Independence Resolution : The stylus tip radius can be as small as 20 nanometres Direct Technique : No modelling required. Not suitable for very soft (or even liquid) and easily damageable surface Very hard and damage surface can damage the stylus Only ...
... Acceptance & Easy to Use Surface Independence Resolution : The stylus tip radius can be as small as 20 nanometres Direct Technique : No modelling required. Not suitable for very soft (or even liquid) and easily damageable surface Very hard and damage surface can damage the stylus Only ...
CV Raman Life and Work
... 1293- Scattering of Sun light by water (not because of weak fluorescence) At a very early stage in our investigations, we came across a new and entirely unexpected phenomenon. As early as 1923, it was noticed that when sunlight filtered through a violet glass passes through certain liquids and solid ...
... 1293- Scattering of Sun light by water (not because of weak fluorescence) At a very early stage in our investigations, we came across a new and entirely unexpected phenomenon. As early as 1923, it was noticed that when sunlight filtered through a violet glass passes through certain liquids and solid ...
Creating laser light
... Light emission involves a complicated set of physical processes. Even a single type of laser like a HeNe can radiate light at several wavelengths. ...
... Light emission involves a complicated set of physical processes. Even a single type of laser like a HeNe can radiate light at several wavelengths. ...
System design based on EDW code using FSO-FTTH
... FSO can deliver the same bandwidth as optical fiber but without the extra cost of right way and trenching, without the electromagnetic interference due to the nature of the information carrier photons unlike the RF based system, it has light weight and is very compact and consumes low power [2]. Fre ...
... FSO can deliver the same bandwidth as optical fiber but without the extra cost of right way and trenching, without the electromagnetic interference due to the nature of the information carrier photons unlike the RF based system, it has light weight and is very compact and consumes low power [2]. Fre ...
Non-iterative phase hologram computation for low
... CGHs are ideally complex valued functions that modulate both the amplitude and phase of the incident light. Yet, available SLMs can provide only some restricted type of modulation, such as phase-only, amplitude-only or binary [14, 15]. One option is to perform direct quantization on the ideal full c ...
... CGHs are ideally complex valued functions that modulate both the amplitude and phase of the incident light. Yet, available SLMs can provide only some restricted type of modulation, such as phase-only, amplitude-only or binary [14, 15]. One option is to perform direct quantization on the ideal full c ...
Localized surface plasmon resonances
... • Simulation shows negative phase velocity with respect to power flow • Negative refractive index of -2 ...
... • Simulation shows negative phase velocity with respect to power flow • Negative refractive index of -2 ...
Optical coupling devices
... by mounting them in V shaped grooves etched in silicon with light transmitted along optical ?bres. ‘ blocks or by other known accurate mounting means. ...
... by mounting them in V shaped grooves etched in silicon with light transmitted along optical ?bres. ‘ blocks or by other known accurate mounting means. ...
Chapter 8: Major Elements
... Index of refraction For a substance x: nx = vair/vx nair = ?? light is slower in water, glass, crystals Is nwater greater or less than 1?? Larger n associated with slower V !! ...
... Index of refraction For a substance x: nx = vair/vx nair = ?? light is slower in water, glass, crystals Is nwater greater or less than 1?? Larger n associated with slower V !! ...
Geometric Optics - IndiaStudyChannel.com
... OPTICS is study of propagation of light. In Geometric optics we are just concerned about, what the path of light is when it gets reflected or refracted. While dealing with Geometric optics we consider light rays to e paraxial i.e. which re very near to each other and thus a lot of assumptions could ...
... OPTICS is study of propagation of light. In Geometric optics we are just concerned about, what the path of light is when it gets reflected or refracted. While dealing with Geometric optics we consider light rays to e paraxial i.e. which re very near to each other and thus a lot of assumptions could ...
Design, fabrication and testing of microlens arrays for sensors and
... interferometer. The wave aberrations of the measured surface were calculated by raytracing analysis. Figure 10 shows greyscale plots of (a) the directly measured aberrations in a Mach–Zehnder interferometer and (b) the aberrations calculated by ray-tracing analysis from the surface measurement in a ...
... interferometer. The wave aberrations of the measured surface were calculated by raytracing analysis. Figure 10 shows greyscale plots of (a) the directly measured aberrations in a Mach–Zehnder interferometer and (b) the aberrations calculated by ray-tracing analysis from the surface measurement in a ...
Model for estimating the penetration depth limit of
... technique for living tissue applications. First, the incident light fluence per pulse at the tissue surface has to be smaller than the tissue damage threshold ( 20 mJ cm −2 according to the ANSI medical safety standard [11]). We note that a pulsed light source is assumed as it yields more photons un ...
... technique for living tissue applications. First, the incident light fluence per pulse at the tissue surface has to be smaller than the tissue damage threshold ( 20 mJ cm −2 according to the ANSI medical safety standard [11]). We note that a pulsed light source is assumed as it yields more photons un ...
ZnO/SiO2 microcavity modulator on silicon Abstract - Paul
... Microcavity-based light modulators of the type in Fig. 1(a), fabricated using epitaxiallygrown (Al,Ga)As structures, have intensity ratios R1 between impinging and back-diffracted light beams approaching 50%.3,6 Their fabrication requires piezoelectric layers with a high refractive index contrast to ...
... Microcavity-based light modulators of the type in Fig. 1(a), fabricated using epitaxiallygrown (Al,Ga)As structures, have intensity ratios R1 between impinging and back-diffracted light beams approaching 50%.3,6 Their fabrication requires piezoelectric layers with a high refractive index contrast to ...
Plasmonic Nearfield Scanning Probe with High Transmission
... offers a practical means of optical imaging and sensing, as well as nanolithography, all with resolution well beyond the diffraction limit of the light. However, its applications are somewhat limited by the strong attenuation of the light transmitted through the subwavelength aperture. For example, ...
... offers a practical means of optical imaging and sensing, as well as nanolithography, all with resolution well beyond the diffraction limit of the light. However, its applications are somewhat limited by the strong attenuation of the light transmitted through the subwavelength aperture. For example, ...
Numerical modelling of LCD electro
... at a new time step. A simple discretisation scheme is “forward Euler”, with the time derivative replaced by a simple difference. This method however is not very accurate and more important it is numerically instable which means that time step must kept very small to avoid artifacts like oscillations ...
... at a new time step. A simple discretisation scheme is “forward Euler”, with the time derivative replaced by a simple difference. This method however is not very accurate and more important it is numerically instable which means that time step must kept very small to avoid artifacts like oscillations ...
An Introduction to Propagation, Time Reversal and Imaging in
... It is important to realize that there is no physical difference between interference and diffraction. However, it is traditional to consider a phenomenon as interference when it involves the superposition of only a few waves, and as diffraction when a large number of waves are involved. Another aspe ...
... It is important to realize that there is no physical difference between interference and diffraction. However, it is traditional to consider a phenomenon as interference when it involves the superposition of only a few waves, and as diffraction when a large number of waves are involved. Another aspe ...
Analysis And Design Of Wide-angle Foveated Optical
... Figure 2: Fast wide-angle lens: 18 mm, F/2.8, 80 degrees FOV. Layout, modulation transfer function, field curvature and distortion, and relative illumination. ............... 9 Figure 3: The human eye [2]. ............................................................................................ ...
... Figure 2: Fast wide-angle lens: 18 mm, F/2.8, 80 degrees FOV. Layout, modulation transfer function, field curvature and distortion, and relative illumination. ............... 9 Figure 3: The human eye [2]. ............................................................................................ ...
4 semester - School of Instrumentation
... 12. Design a differentiator circuit to differentiate an input signal of amplitude IV (sinusoidal and square wave). Plot the input and output signal as observed on CRD screen using tracing paper. 13. Design an integrator circuit to integrate (a) sinusoidal wave of amplitude IV, (b) square wave of amp ...
... 12. Design a differentiator circuit to differentiate an input signal of amplitude IV (sinusoidal and square wave). Plot the input and output signal as observed on CRD screen using tracing paper. 13. Design an integrator circuit to integrate (a) sinusoidal wave of amplitude IV, (b) square wave of amp ...
Optical generation and detection of elastic waves in solids
... system for material inspection. In the field of nondestructive testing, the thermoelastic regime is needed to avoid any surface damage and the low induced amplitude makes optical detection difficult. Recently, techniques that use an array of thermoelastic sources have been proposed. Results obtained ...
... system for material inspection. In the field of nondestructive testing, the thermoelastic regime is needed to avoid any surface damage and the low induced amplitude makes optical detection difficult. Recently, techniques that use an array of thermoelastic sources have been proposed. Results obtained ...
AHS用スキャニングレーザレンジファインダー の試作及びそれを用いた
... The implementation of this forward looking equipaccident avoidance systems for automobiles. Curment requires object detection, as well as highways rent safety systems, such as air bags and improved contours detection. Object detection devices curstructures, have reduced the injuries of accidents, re ...
... The implementation of this forward looking equipaccident avoidance systems for automobiles. Curment requires object detection, as well as highways rent safety systems, such as air bags and improved contours detection. Object detection devices curstructures, have reduced the injuries of accidents, re ...