Frequency-comb-referenced two-wavelength source
... An active frequency comb is based on a fs modelocked laser,5 whose repetition rate, frep, defines exactly the frequency separation between two adjacent modes of its frequency spectrum. Several cw lasers can be locked to different modes of the comb by beat frequency measurements and electronic phase ...
... An active frequency comb is based on a fs modelocked laser,5 whose repetition rate, frep, defines exactly the frequency separation between two adjacent modes of its frequency spectrum. Several cw lasers can be locked to different modes of the comb by beat frequency measurements and electronic phase ...
The Wave-Front Aberration Polynomial
... Ideal imaging systems perform point-to-point imaging. This requires that a spherical wave front expanding from each object point (o) is converted to a spherical wave front converging to a corresponding image point (o’). However, real optical systems produce an imperfect “aberrated” image. The aberra ...
... Ideal imaging systems perform point-to-point imaging. This requires that a spherical wave front expanding from each object point (o) is converted to a spherical wave front converging to a corresponding image point (o’). However, real optical systems produce an imperfect “aberrated” image. The aberra ...
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... Spectral-domain OCT (SD-OCT) technology offers another means to acquire high definition optical coherence tomography images of angle structures. Compared to time-domain imaging technology, SD-OCT has a faster scan speed of up to 100 times (24 000-55 000 axial scans per second 400 axial scans per sec ...
... Spectral-domain OCT (SD-OCT) technology offers another means to acquire high definition optical coherence tomography images of angle structures. Compared to time-domain imaging technology, SD-OCT has a faster scan speed of up to 100 times (24 000-55 000 axial scans per second 400 axial scans per sec ...
Weighting the prior of a fluid dedicated optical flow estimator
... In this paper, we give a first parametric investigation of a fluid dedicated optical flow estimator. From a dimensional analysis of the optical flow equations, a nondimensional regularization parameter is introduced. Then, the relation between the different main scales (luminance, space, time) with ...
... In this paper, we give a first parametric investigation of a fluid dedicated optical flow estimator. From a dimensional analysis of the optical flow equations, a nondimensional regularization parameter is introduced. Then, the relation between the different main scales (luminance, space, time) with ...
Some Issues from Advanced Lithography General
... A powerful light source we need because we cannot afford to wait forever before an exposure is finished. The maximum exposure time should be below a second or so, and you simply need intense light for that. Monochromatic light we need, because we cannot possible built a supreme lens for many wavelen ...
... A powerful light source we need because we cannot afford to wait forever before an exposure is finished. The maximum exposure time should be below a second or so, and you simply need intense light for that. Monochromatic light we need, because we cannot possible built a supreme lens for many wavelen ...
Document
... Imaging is the process of mapping a certain physical property of an object and displaying it in a visual form [8]. Examples of such physical properties include absorption (e.g. light imaging, xrays), reflectivity (e.g. ultrasound, photography), proton density (e.g. MRI), concentration of radionu ...
... Imaging is the process of mapping a certain physical property of an object and displaying it in a visual form [8]. Examples of such physical properties include absorption (e.g. light imaging, xrays), reflectivity (e.g. ultrasound, photography), proton density (e.g. MRI), concentration of radionu ...
Optical pulse generation using a low-voltage electro-optic
... Recently, the interest in all-optical processing of microwave and millimeter-wave signals is growing because of the advantages with respect to electronic processing. Indeed, the larger time-bandwidth products, insensitivity to electromagnetic interference, low loss, light weight and high data-transf ...
... Recently, the interest in all-optical processing of microwave and millimeter-wave signals is growing because of the advantages with respect to electronic processing. Indeed, the larger time-bandwidth products, insensitivity to electromagnetic interference, low loss, light weight and high data-transf ...
Lumalive Evaluation Kit
... diffusion is the spreading out of light by a material. The amount of diffusion depends on the density, the structure and the thickness of the material. The amount of light coming from the display pane underneath a number of fabric layers will depend on the optical transmission of the fabrics. The tr ...
... diffusion is the spreading out of light by a material. The amount of diffusion depends on the density, the structure and the thickness of the material. The amount of light coming from the display pane underneath a number of fabric layers will depend on the optical transmission of the fabrics. The tr ...
Supplementary Methods and References
... tissue slide is then rehydrated in ethanol series with graded alcohol (the same as the processing for unstained slide), stained with hematoxylin and eosin, and then dehydrated back to xylene in reverse order of grade alcohol. The slide is then coverslipped with the same mounting medium. The H&E-stai ...
... tissue slide is then rehydrated in ethanol series with graded alcohol (the same as the processing for unstained slide), stained with hematoxylin and eosin, and then dehydrated back to xylene in reverse order of grade alcohol. The slide is then coverslipped with the same mounting medium. The H&E-stai ...
Interference
... • The iridescent sheen of a bluebird wing or the extravagant colours of many butterflies and moths arise - not from chemistry (pigments) but from physics (interference effects)!! ...
... • The iridescent sheen of a bluebird wing or the extravagant colours of many butterflies and moths arise - not from chemistry (pigments) but from physics (interference effects)!! ...
P2SF: Physically-based Point Spread Function for
... example, depth estimation [1] and image restoration [2]. On the other hand, this approach does not provide an accurate representation of aberrated optical system due to the lack of physical foundation and the limited parametric description of the PSF, which is based on simple functions , such as pil ...
... example, depth estimation [1] and image restoration [2]. On the other hand, this approach does not provide an accurate representation of aberrated optical system due to the lack of physical foundation and the limited parametric description of the PSF, which is based on simple functions , such as pil ...
Diffracted Light Contrast: Improving the Resolution - Microscopy-UK
... is precisely the same as the image-forming light path. This can be proven by the fact that the defocused edge is always visible through the eyepieces. As a result, the sample truly is being illuminated not by a diffuse beam of illumination, as would be the case in Koehler illumination, but by a prec ...
... is precisely the same as the image-forming light path. This can be proven by the fact that the defocused edge is always visible through the eyepieces. As a result, the sample truly is being illuminated not by a diffuse beam of illumination, as would be the case in Koehler illumination, but by a prec ...
DRI OCT-1 Abstracts DRI OCT-1
... of 111 participants) was imaged using the new swept-source OCT prototype system (DRI-OCT-1, Topcon Corp, Japan) at 100 kHz A-scan repetition rate with 100nm sweeping range, yielding 8 μm axial resolution in tissue. Retinal and choroidal thickness maps of the fovea were created by automated segmentat ...
... of 111 participants) was imaged using the new swept-source OCT prototype system (DRI-OCT-1, Topcon Corp, Japan) at 100 kHz A-scan repetition rate with 100nm sweeping range, yielding 8 μm axial resolution in tissue. Retinal and choroidal thickness maps of the fovea were created by automated segmentat ...
Single-pixel infrared and visible microscope
... light is blocked and some passes to create a signal on a single detector, then this signal contains information about how similar the mask is to the image. If many different masks are used, ...
... light is blocked and some passes to create a signal on a single detector, then this signal contains information about how similar the mask is to the image. If many different masks are used, ...
Optical Low-pass Filter
... As shown in the figure below, wavelength plates are used mainly for picking up optical information files (DVD, etc) to prevent the back-talk noise of laser beams. ...
... As shown in the figure below, wavelength plates are used mainly for picking up optical information files (DVD, etc) to prevent the back-talk noise of laser beams. ...
ETM4106Tutorial3
... ETM 4106 Optoelectronics and Optical Communication Tutorial 3 Solve the following problems: Q.1 The optical power launched into an 8 km length fiber is 120 W, while at the output power is reduced to 3 W. Determine: (a) the signal loss in dB through the fiber (b) signal attenuation per km for the ...
... ETM 4106 Optoelectronics and Optical Communication Tutorial 3 Solve the following problems: Q.1 The optical power launched into an 8 km length fiber is 120 W, while at the output power is reduced to 3 W. Determine: (a) the signal loss in dB through the fiber (b) signal attenuation per km for the ...
towards integrated long-wavelength light sources
... Detecting small traces of pollutants in the air or analyzing blood samples has been done extensively by using light. In such a spectroscopic approach, a broadband or tunable light source reveals the absorption features of molecules which need to be detected in a sample. Strong absorption features of ...
... Detecting small traces of pollutants in the air or analyzing blood samples has been done extensively by using light. In such a spectroscopic approach, a broadband or tunable light source reveals the absorption features of molecules which need to be detected in a sample. Strong absorption features of ...
CCD-Based Instrumentation for Radiometric
... a billionth of a meter. Optical radiation lies between radio waves and x-rays on the spectrum, exhibiting a unique mix of ray, wave, and quantum properties. In optics radiometry is a set of techniques for measuring electromagnetic radiation including visible light. A radiometric technique which char ...
... a billionth of a meter. Optical radiation lies between radio waves and x-rays on the spectrum, exhibiting a unique mix of ray, wave, and quantum properties. In optics radiometry is a set of techniques for measuring electromagnetic radiation including visible light. A radiometric technique which char ...
Soliton Propagation in Optical Fibers
... • C.K. Kao and George Hockham – Single mode fiber – Rods in air, energy along surface, low absorption loss – 0.1-0.2 microns thick – Added Cladding! – 1% index change => O(10) increased diameter – Easier to focus light on core – New Problem – light travels in core => optical losses – Paper – loss ca ...
... • C.K. Kao and George Hockham – Single mode fiber – Rods in air, energy along surface, low absorption loss – 0.1-0.2 microns thick – Added Cladding! – 1% index change => O(10) increased diameter – Easier to focus light on core – New Problem – light travels in core => optical losses – Paper – loss ca ...
ARVO 2016 Annual Meeting Abstracts 366 Optical imaging
... Results: Images were obtained on 3 eyes. Confocal images had high contrast and resolution (Figure 1). Multiply scattered light images showed expected features, with the exception of small flickers affecting < 1% of the image pixels. Efficiency of the programmable array was less than our system which ...
... Results: Images were obtained on 3 eyes. Confocal images had high contrast and resolution (Figure 1). Multiply scattered light images showed expected features, with the exception of small flickers affecting < 1% of the image pixels. Efficiency of the programmable array was less than our system which ...
Optical Mode Switch
... We compared the optical space switch and proposed the optical mode switch which can reduce the chip size [1-3]. In order to verify the basic operation principle of the optical mode switch, cross state device is represented with a different arm length device corresponding to the refractive index shif ...
... We compared the optical space switch and proposed the optical mode switch which can reduce the chip size [1-3]. In order to verify the basic operation principle of the optical mode switch, cross state device is represented with a different arm length device corresponding to the refractive index shif ...
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... Spectroscopy Working with Optical Detectors An op-amp is a differential amplifier: We can use this same idea in optics to achieve a high rejection ratio of common mode noise – eliminate noise that is common to both input channels of the amplifier. Good technique for low-level signals appearing on to ...
... Spectroscopy Working with Optical Detectors An op-amp is a differential amplifier: We can use this same idea in optics to achieve a high rejection ratio of common mode noise – eliminate noise that is common to both input channels of the amplifier. Good technique for low-level signals appearing on to ...
Flanged Sample Compartment Flanged Beam Splitter Holder
... The 78150 Beam Splitter Mount holds a 2 inch (51 mm) square beam splitter, up to 0.25 inch (6 mm) thick, at a 45° angle. Since it can be coupled directly to Oriel light sources, monochromators, and detectors via the 1.5 Inch Series flanges, it is a convenient device for splitting a beam in an enclos ...
... The 78150 Beam Splitter Mount holds a 2 inch (51 mm) square beam splitter, up to 0.25 inch (6 mm) thick, at a 45° angle. Since it can be coupled directly to Oriel light sources, monochromators, and detectors via the 1.5 Inch Series flanges, it is a convenient device for splitting a beam in an enclos ...
CHEM 210 Chapter 5 Wrap-up
... Calculating Enantiomeric Excess or Optical Purity • It is important to know what this means. Since any R impurity will ‘cancel’ the rotation of an equal amount of S: • A sample with an ee of 50% S is actually 50% pure S and 50% racemic R/S. • The total S enantiomer in the sample is actually ...
... Calculating Enantiomeric Excess or Optical Purity • It is important to know what this means. Since any R impurity will ‘cancel’ the rotation of an equal amount of S: • A sample with an ee of 50% S is actually 50% pure S and 50% racemic R/S. • The total S enantiomer in the sample is actually ...
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.