Application of Digital Phase-shift Shadow Moiré to Micro
... particular portion of the surface being illuminated and φ is the angle between the incident ray and the normal to the surface. The first term at the right side of the equation is the intensity of the shadow of the grid projected by the pointlike light source onto the surface, while the second term c ...
... particular portion of the surface being illuminated and φ is the angle between the incident ray and the normal to the surface. The first term at the right side of the equation is the intensity of the shadow of the grid projected by the pointlike light source onto the surface, while the second term c ...
Optical measurement of depth and duty cycle for
... function of grating depth. Performing the same analysis for the orthogonal probe-light polarization results in a different functional dependence of the duty cycle on the grating depth. By use of both TE and TM polarizations, the depth and duty cycle for the grating are obtained by the intersection o ...
... function of grating depth. Performing the same analysis for the orthogonal probe-light polarization results in a different functional dependence of the duty cycle on the grating depth. By use of both TE and TM polarizations, the depth and duty cycle for the grating are obtained by the intersection o ...
“Decision Making in Glaucoma: When to pull the trigger” COPE
... RNFL birefringence (GDx VCC). It measures NFL thickness but only inferentially measures loss based on normative database. ...
... RNFL birefringence (GDx VCC). It measures NFL thickness but only inferentially measures loss based on normative database. ...
Measuring the complex orbital angular momentum spectrum of light
... fringes [8], diffraction patterns from apertures [9], diffractive holographic filters [10], and optical transformation elements [11]. Nevertheless, the OAM spectrum metrology has not been 0146-9592/17/061080-04 Journal © 2017 Optical Society of America ...
... fringes [8], diffraction patterns from apertures [9], diffractive holographic filters [10], and optical transformation elements [11]. Nevertheless, the OAM spectrum metrology has not been 0146-9592/17/061080-04 Journal © 2017 Optical Society of America ...
appel a projets recherche 2014 - lumat - Université Paris-Sud
... through the investigation of the radiative emission .properties of the heated sample. The primary process for the energy deposition is direct photoionization of the solid by the incident XUV pulse, with a strong dependence with respect of the energy (wavelength) of the photons. Our particular intere ...
... through the investigation of the radiative emission .properties of the heated sample. The primary process for the energy deposition is direct photoionization of the solid by the incident XUV pulse, with a strong dependence with respect of the energy (wavelength) of the photons. Our particular intere ...
The Sampling Pattern Cube
... devices are becoming cheaper and are providing even more built-in features. Digital photography has made it easy in relation to capturing, sending and storing high quality images all at a reasonable price. In addition to conventional cameras that have become very popular and for which there are an e ...
... devices are becoming cheaper and are providing even more built-in features. Digital photography has made it easy in relation to capturing, sending and storing high quality images all at a reasonable price. In addition to conventional cameras that have become very popular and for which there are an e ...
technical paper
... on total internal reflectance. In addition to waveguides, dense wavelength division multiplexing (DWDM) filters reflect over very narrow wavelength bands and are used to separate optical signals in telecommunication fiber optics. The list goes on…. In addition to improving performance and adding col ...
... on total internal reflectance. In addition to waveguides, dense wavelength division multiplexing (DWDM) filters reflect over very narrow wavelength bands and are used to separate optical signals in telecommunication fiber optics. The list goes on…. In addition to improving performance and adding col ...
Resonant bio- and chemical sensors using low-refractive
... minimal detectable spectral shift in the peak position is (p )min (which is typically on the order of 0.1 nm in the visible spectral range if no advanced optical detection is used), then the minimum value of a measurand that can be detected by such a sensor is: ımin = ...
... minimal detectable spectral shift in the peak position is (p )min (which is typically on the order of 0.1 nm in the visible spectral range if no advanced optical detection is used), then the minimum value of a measurand that can be detected by such a sensor is: ımin = ...
Gradient Index Optics at DARPA - Institute for Defense Analyses
... Defense Analyses (IDA) to assemble a summary of work on gradient index optics completed under funding from the Agency. The purpose was to archive the efforts, motivation, and accomplishments that the Agency supported and to provide a reference for any future programs that explore this new area of op ...
... Defense Analyses (IDA) to assemble a summary of work on gradient index optics completed under funding from the Agency. The purpose was to archive the efforts, motivation, and accomplishments that the Agency supported and to provide a reference for any future programs that explore this new area of op ...
Waveguide Dispersion
... BL = 0.59L/t1/2 = 0.59/(16 ps km-1) = 36.9 Gb s-1 km. The optical and electrical bandwidths for a 10 km distance is fop = 0.75B = 0.75(36.9 Gb s-1 km) / (10 km) = 2.8 GHz. ...
... BL = 0.59L/t1/2 = 0.59/(16 ps km-1) = 36.9 Gb s-1 km. The optical and electrical bandwidths for a 10 km distance is fop = 0.75B = 0.75(36.9 Gb s-1 km) / (10 km) = 2.8 GHz. ...
WDM and DWDM Multiplexing
... Cost effective way of increasing capacity without replacing fibre Commercial systems available with capacities of 32 channels and upwards; > 80 Gb/s per fibre Allows new optical network topologies, for example high speed metropolitian rings Optical amplifiers are also a key component ...
... Cost effective way of increasing capacity without replacing fibre Commercial systems available with capacities of 32 channels and upwards; > 80 Gb/s per fibre Allows new optical network topologies, for example high speed metropolitian rings Optical amplifiers are also a key component ...
Wavelength Conversion Using Reconfigurable Photonic
... nanotechnology. Being able to manipulate light at the chip level can lead to very revolutionary results and applications. Consequently, one can find very interesting nanophotonics research topics in the literature. Photonic crystals are the first example of popular nanophotonic structures. When hand ...
... nanotechnology. Being able to manipulate light at the chip level can lead to very revolutionary results and applications. Consequently, one can find very interesting nanophotonics research topics in the literature. Photonic crystals are the first example of popular nanophotonic structures. When hand ...
Journal of Nonlinear Optical - Research School of Physics and
... in optical communications and computing, beam steering and shaping, biosensing and medical diagnostics. To achieve our goals, we need to employ periodic structures of different geometries, which are easy to fabricate, and which possess strong nonlinearities at moderate laser powers. Currently there e ...
... in optical communications and computing, beam steering and shaping, biosensing and medical diagnostics. To achieve our goals, we need to employ periodic structures of different geometries, which are easy to fabricate, and which possess strong nonlinearities at moderate laser powers. Currently there e ...
Types of Microscope - The City School, PAF Chapter, Class 7
... in woven cloth. He became so interested that he learned how to make lenses. By grinding and polishing, he was able to make small lenses with great curvatures. These rounder lenses produced greater magnification, and his microscopes were able to magnify up to 270X! Anthony Leeuwenhoek became more inv ...
... in woven cloth. He became so interested that he learned how to make lenses. By grinding and polishing, he was able to make small lenses with great curvatures. These rounder lenses produced greater magnification, and his microscopes were able to magnify up to 270X! Anthony Leeuwenhoek became more inv ...
View PDF
... SBK head was used to create an 8.5-9.0 mm diameter corneal flap with a nasal hinge. This device is used to obtain an attempted central flap thickness of 110 μm with a calibrated 90 µm-head selecting the lowest speed (“Speed 1”) on the associated Evolution 3 control unit. M2 Single-Use 90 µm-head mic ...
... SBK head was used to create an 8.5-9.0 mm diameter corneal flap with a nasal hinge. This device is used to obtain an attempted central flap thickness of 110 μm with a calibrated 90 µm-head selecting the lowest speed (“Speed 1”) on the associated Evolution 3 control unit. M2 Single-Use 90 µm-head mic ...
Coatings - CVI Laser Optics
... refractive index between the two media, and the angle of incidence of the light at the interface. For most uncoated optical glasses, 4-5% of incident light is reflected at each surface. Consequently, for designs using more than a few components, transmitted light losses can be significant. More impo ...
... refractive index between the two media, and the angle of incidence of the light at the interface. For most uncoated optical glasses, 4-5% of incident light is reflected at each surface. Consequently, for designs using more than a few components, transmitted light losses can be significant. More impo ...
: (2%)
... locking and polarization shifting. In particular, modula a component having P2 linearly polarized wave energy, tion means 110a of FIG. 1a comprises a single electro in addition to the component having P, linearly polar optical crystal 120, which has a dc. bias 122 of a given ized wave energy. As des ...
... locking and polarization shifting. In particular, modula a component having P2 linearly polarized wave energy, tion means 110a of FIG. 1a comprises a single electro in addition to the component having P, linearly polar optical crystal 120, which has a dc. bias 122 of a given ized wave energy. As des ...
Keeping an eye on safety Protection against laser radiation
... tion of optical radiation may result in the forma tion of highly reactive oxygen species (ROS) which can damage the genetic material deoxyribonucleic acid (DNA). Optical radiation in the UV range may also damage DNA directly. This kind of DNA dam age can lead to cancer. Laser radiation acts therma ...
... tion of optical radiation may result in the forma tion of highly reactive oxygen species (ROS) which can damage the genetic material deoxyribonucleic acid (DNA). Optical radiation in the UV range may also damage DNA directly. This kind of DNA dam age can lead to cancer. Laser radiation acts therma ...
Assessment of optical systems by means of point
... of the wavelength of the light. Interferometric methods are mostly used for this purpose. Although the achievable precision is very high, these methods need refined and delicate optical set-ups and, in practice, special laser sources to achieve sufficient signal-to-noise ratio. When a measurement at ...
... of the wavelength of the light. Interferometric methods are mostly used for this purpose. Although the achievable precision is very high, these methods need refined and delicate optical set-ups and, in practice, special laser sources to achieve sufficient signal-to-noise ratio. When a measurement at ...
Chapter 2 . Afocal Systems
... objects. A more useful distinction between focusing and afocal lenses concerns which optical parameters are fixed, and which can vary in use. Focusing lenses have a fixed, finite focal length, can produce real images for a wide range of object distances, and have a linear magnification which varies ...
... objects. A more useful distinction between focusing and afocal lenses concerns which optical parameters are fixed, and which can vary in use. Focusing lenses have a fixed, finite focal length, can produce real images for a wide range of object distances, and have a linear magnification which varies ...
Monte Carlo simulation of light scattering in the atmosphere and
... be dispersed again to the detector and only direct light is recorded – is not valid anymore. Thus, the multiple light scattering – when photons are scattered several times before being detected – has to be taken into account in the total signal recorded. Whereas the first phenomenon reduces the amou ...
... be dispersed again to the detector and only direct light is recorded – is not valid anymore. Thus, the multiple light scattering – when photons are scattered several times before being detected – has to be taken into account in the total signal recorded. Whereas the first phenomenon reduces the amou ...
IASI level 0 and 1 processing algorithms description
... where N is the size of the FFT and is the off axis angle. This equation is valid directly for pixel of small size. For a larger pixel the angle must be averaged over the whole pixel. In order to be able to apply this spectral calibration, the value of the p angle must be known for each of the I ...
... where N is the size of the FFT and is the off axis angle. This equation is valid directly for pixel of small size. For a larger pixel the angle must be averaged over the whole pixel. In order to be able to apply this spectral calibration, the value of the p angle must be known for each of the I ...
Fiber Optic Lab Manual
... To obtain best results in this activity, you may need to dim the room lights or cover the light guide with a dark cloth or box. This will minimize the chance of ambient light being captured by the phototransistor, and improve the accuracy of your measurements. ...
... To obtain best results in this activity, you may need to dim the room lights or cover the light guide with a dark cloth or box. This will minimize the chance of ambient light being captured by the phototransistor, and improve the accuracy of your measurements. ...
Tesis_Enrique_Gambra
... better understanding of accommodation will help to develop solutions for some visual problems, in particular presbyopia. Presbyopia is the gradual loss of ability to focus near targets due to the physiological changes of the crystalline lens with age, which affects all people over the age of 45. Tak ...
... better understanding of accommodation will help to develop solutions for some visual problems, in particular presbyopia. Presbyopia is the gradual loss of ability to focus near targets due to the physiological changes of the crystalline lens with age, which affects all people over the age of 45. Tak ...
DFB Quantum Cascade Laser Arrays The Harvard community has
... The mid-infrared spectral region is important, among other reasons, for chemical sensing and analysis. Many gas- and liquid-phase chemicals have characteristic absorption features in this region that can be used to identify them. Applications of QCLs in chemical sensing include, but are not limited ...
... The mid-infrared spectral region is important, among other reasons, for chemical sensing and analysis. Many gas- and liquid-phase chemicals have characteristic absorption features in this region that can be used to identify them. Applications of QCLs in chemical sensing include, but are not limited ...
Optical coherence tomography
Optical coherence tomography (OCT) is an established medical imaging technique that uses light to capture micrometer-resolution, three-dimensional images from within optical scattering media (e.g., biological tissue). Optical coherence tomography is based on low-coherence interferometry, typically employing near-infrared light. The use of relatively long wavelength light allows it to penetrate into the scattering medium. Confocal microscopy, another optical technique, typically penetrates less deeply into the sample but with higher resolution.Depending on the properties of the light source (superluminescent diodes, ultrashort pulsed lasers, and supercontinuum lasers have been employed), optical coherence tomography has achieved sub- micrometer resolution (with very wide-spectrum sources emitting over a ~100 nm wavelength range).Optical coherence tomography is one of a class of optical tomographic techniques. A relatively recent implementation of optical coherence tomography, frequency-domain optical coherence tomography, provides advantages in signal-to-noise ratio, permitting faster signal acquisition. Commercially available optical coherence tomography systems are employed in diverse applications, including art conservation and diagnostic medicine, notably in ophthalmology and optometry where it can be used to obtain detailed images from within the retina. Recently it has also begun to be used in interventional cardiology to help diagnose coronary artery disease. It has also shown promise in dermatology to improve the diagnostic process.