Adaptive Speckle Imaging Interferometry, a new technique for a
... illuminated sequentially by different speckles, either by scanning the beam through the sample or by “scrambling” the scattered photons by letting them go through an additional scatterer before being detected (the 2 nd cell or the rotating frosty glass). In the so-called “multispeckle” methods [9,14 ...
... illuminated sequentially by different speckles, either by scanning the beam through the sample or by “scrambling” the scattered photons by letting them go through an additional scatterer before being detected (the 2 nd cell or the rotating frosty glass). In the so-called “multispeckle” methods [9,14 ...
Nanoconcentration of terahertz radiation in
... [6, 7, 8] and ultrasensitive Raman spectroscopy [9]. It will be very beneficial for the fundamental science, engineering, environmental, and defense applications to be able to nano-concentrate terahertz radiation (frequency 1 − 10 THz or vacuum wavelength λ 0 = 300 − 30 μ m). This will allow for the ...
... [6, 7, 8] and ultrasensitive Raman spectroscopy [9]. It will be very beneficial for the fundamental science, engineering, environmental, and defense applications to be able to nano-concentrate terahertz radiation (frequency 1 − 10 THz or vacuum wavelength λ 0 = 300 − 30 μ m). This will allow for the ...
Towards Multimaterial Multifunctional Fibres that See, Hear, Sense and Communicate
... versus wave vector β diagram for both polarizations (TE and TM). Light incident from an ambient medium is limited to that portion of the figure that is above the light lines (β = ω/c). Externally incident light in the range of frequencies shown in grey cannot couple to any propagating states within ...
... versus wave vector β diagram for both polarizations (TE and TM). Light incident from an ambient medium is limited to that portion of the figure that is above the light lines (β = ω/c). Externally incident light in the range of frequencies shown in grey cannot couple to any propagating states within ...
Soft-x-ray laser interferometry of a pinch discharge using a tabletop... * C. H. Moreno, M. C. Marconi,
... The interferometer design requires the use of two nearnormal incidence mirrors. The literature indicates that Ir or Os coatings can produce normal incidence reflectivities of nearly 20% at 46.9 nm @16#. However, we have observed during our experiments that in practice the reflectivity of Ir coatings ...
... The interferometer design requires the use of two nearnormal incidence mirrors. The literature indicates that Ir or Os coatings can produce normal incidence reflectivities of nearly 20% at 46.9 nm @16#. However, we have observed during our experiments that in practice the reflectivity of Ir coatings ...
Distance Sensing with Dynamic Speckles
... which makes it possible to work with fast-moving objects, and (ii) the possibility of making measurements on extremely rough surfaces where other sensors such as, for example, triangulation [1] do not reach the required performance. The proposed technique is based on the well-known speckle effect di ...
... which makes it possible to work with fast-moving objects, and (ii) the possibility of making measurements on extremely rough surfaces where other sensors such as, for example, triangulation [1] do not reach the required performance. The proposed technique is based on the well-known speckle effect di ...
Resolving the Vergence-Accommodation Conflict in Head Mounted
... describe the various methods and metrics that have been proposed or applied to evaluate the effectiveness of existing solutions. Finally, in Section 4, we identify potential areas within the solution space that have yet to be explored or can be improved. 1.1 The Accommodation-Vergence Conflict The h ...
... describe the various methods and metrics that have been proposed or applied to evaluate the effectiveness of existing solutions. Finally, in Section 4, we identify potential areas within the solution space that have yet to be explored or can be improved. 1.1 The Accommodation-Vergence Conflict The h ...
Prospects for Precise Measurements with Echo Atom
... | F = 2i states in 87 Rb. Raman AIs were the first implementation of state-labeled interferometer [45], where the coherent exchange of photon momentum between the atoms and the optical fields is associated with a change in the internal atomic state. Hence, all the information regarding the interfere ...
... | F = 2i states in 87 Rb. Raman AIs were the first implementation of state-labeled interferometer [45], where the coherent exchange of photon momentum between the atoms and the optical fields is associated with a change in the internal atomic state. Hence, all the information regarding the interfere ...
Increasing the Resolution of Far
... The optical counterpart of the scanning probe microscope is the scanning near-field optical microscope (SNOM)(7). It is interesting to note that the principles of the SNOM(9) had been recognized before the advent of the AFM and STM, but the development of the SNOM technique was stimulated by the lat ...
... The optical counterpart of the scanning probe microscope is the scanning near-field optical microscope (SNOM)(7). It is interesting to note that the principles of the SNOM(9) had been recognized before the advent of the AFM and STM, but the development of the SNOM technique was stimulated by the lat ...
Construction of a Fermi Gas Microscope for Fermionic Atoms
... I can’t imagine a better way to have spent the past three years than working in the CUA. The atmosphere in our hallway is amazing; the students and postdocs are all enormously talented and moreover, always willing to discuss physics or have ideas be bounced off them. There’s a genuine spirit of ”we’ ...
... I can’t imagine a better way to have spent the past three years than working in the CUA. The atmosphere in our hallway is amazing; the students and postdocs are all enormously talented and moreover, always willing to discuss physics or have ideas be bounced off them. There’s a genuine spirit of ”we’ ...
The polarization of skylight: An example from nature
... Throughout the paper we will be interested in the irradiance for a wave, because for optical signals this quantity can be measured with a practical detector, in contrast to the electric field, for which there are no detectors available that have a response time short enough to resolve the temporal v ...
... Throughout the paper we will be interested in the irradiance for a wave, because for optical signals this quantity can be measured with a practical detector, in contrast to the electric field, for which there are no detectors available that have a response time short enough to resolve the temporal v ...
Review on X-ray Detectors Based on Scintillators and CMOS
... radiographic films, scintillators are not essential, but they are generally used. In some imaging systems, such as computerized tomography and nuclear medicine imaging, an essential characteristic of the scintillators is used to advantage: they produce a flash of light proportional to the energy of ...
... radiographic films, scintillators are not essential, but they are generally used. In some imaging systems, such as computerized tomography and nuclear medicine imaging, an essential characteristic of the scintillators is used to advantage: they produce a flash of light proportional to the energy of ...
Fabrication of concave silicon micro-mirrors
... forms after the top irradiated region is undercut (Fig. 1b), since PSi formation is isotropic for 0.02 Ω.cm p-type wafers [20]. Moreover, such highly doped wafers typically have a low surface roughness of a few nanometers after the removal of PSi [21]. From Fig. 1d, the diameter, D, of each concave ...
... forms after the top irradiated region is undercut (Fig. 1b), since PSi formation is isotropic for 0.02 Ω.cm p-type wafers [20]. Moreover, such highly doped wafers typically have a low surface roughness of a few nanometers after the removal of PSi [21]. From Fig. 1d, the diameter, D, of each concave ...
holography - UCSB Physics
... shutter by momentarily depressing then releasing the push-button switch. f) Turn on green clock light. As you enter the wet lab, turn right. On the counter you will see a film safe (black plastic box) containing sheets of 4”x 5” film. You will also find two optically flat glass plates. The film is s ...
... shutter by momentarily depressing then releasing the push-button switch. f) Turn on green clock light. As you enter the wet lab, turn right. On the counter you will see a film safe (black plastic box) containing sheets of 4”x 5” film. You will also find two optically flat glass plates. The film is s ...
Continuous wave Nd:YAG channel waveguide laser produced by
... 1. Introduction Optical waveguides offer compact confinement of light propagation down to dimensions of a few micrometers; as a result, the optical intensities within these small volumes reach much higher levels with respect to the bulk samples. Benefiting from high intracavity intensity owing to th ...
... 1. Introduction Optical waveguides offer compact confinement of light propagation down to dimensions of a few micrometers; as a result, the optical intensities within these small volumes reach much higher levels with respect to the bulk samples. Benefiting from high intracavity intensity owing to th ...
Panoramic Imaging with Horizontal Stereo - CS
... viewpoint (Fig 2.a). In particular, a single viewpoint panorama is obtained with rotations about the aperture. However, when the camera is rotated about a vertical axis directly behind the camera, and the vertical slit in not in the center, the resulting image has multiple viewpoints. The moving sli ...
... viewpoint (Fig 2.a). In particular, a single viewpoint panorama is obtained with rotations about the aperture. However, when the camera is rotated about a vertical axis directly behind the camera, and the vertical slit in not in the center, the resulting image has multiple viewpoints. The moving sli ...
The mechanism for continuum polarization in laser induced
... is usually attributed to ion-electron recombination and bremsstrahlung. Various methods have been implemented to suppress the continuum so as to increase the signal/background ratio. In particular, time-gating of the detected signal can reduce the continuum, which generally decays much more rapidly ...
... is usually attributed to ion-electron recombination and bremsstrahlung. Various methods have been implemented to suppress the continuum so as to increase the signal/background ratio. In particular, time-gating of the detected signal can reduce the continuum, which generally decays much more rapidly ...
Optical Quality and Tear Film Analysis after Various Lubricating Eye
... and HD Analyzer (Visiometrics, Terrassa, Spain). These patients were subjected to randomized use of drop A (polyethylene glycol 400 NF 0.4%, propylene glycol 0.3%), drop B (sodium carboxymethyl cellulose (CMC) and glycerin 0.9%), and drop C (sodium CMC-5 mg). The optical quality and tear film were a ...
... and HD Analyzer (Visiometrics, Terrassa, Spain). These patients were subjected to randomized use of drop A (polyethylene glycol 400 NF 0.4%, propylene glycol 0.3%), drop B (sodium carboxymethyl cellulose (CMC) and glycerin 0.9%), and drop C (sodium CMC-5 mg). The optical quality and tear film were a ...
Subwavelength imaging in photonic crystals * Chiyan Luo,
... ‘‘left-handed material’’ with permittivity ⑀ ⫽⫺1 and permeability ⫽⫺1 is capable of capturing both the propagating and evanescent waves emitted by a point source placed in front of the slab and refocusing them into a perfect point image behind the slab. While the focusing effect of propagating wav ...
... ‘‘left-handed material’’ with permittivity ⑀ ⫽⫺1 and permeability ⫽⫺1 is capable of capturing both the propagating and evanescent waves emitted by a point source placed in front of the slab and refocusing them into a perfect point image behind the slab. While the focusing effect of propagating wav ...
OPTICAL ADD-DROP MULTIPLEXERS
... The OADM selectively removes (drops) a wavelength from a multiplicity of wavelengths in a fiber, and thus from traffic on the particular channel. It then adds in the same direction of data flow the same wavelength, but with different data content. The model of an OADM, for wavelength 11.), is schema ...
... The OADM selectively removes (drops) a wavelength from a multiplicity of wavelengths in a fiber, and thus from traffic on the particular channel. It then adds in the same direction of data flow the same wavelength, but with different data content. The model of an OADM, for wavelength 11.), is schema ...
A Basic Introduction to BRDF-Based Lighting
... absorption, and light transmittance. That is, some of the incident light is reflected, some of the light is transmitted, and another portion of the light is absorbed by the medium itself. Because light is a form of energy, conservation of energy tells us that light incident at surface = light reflec ...
... absorption, and light transmittance. That is, some of the incident light is reflected, some of the light is transmitted, and another portion of the light is absorbed by the medium itself. Because light is a form of energy, conservation of energy tells us that light incident at surface = light reflec ...
Basic Physical Optics
... to locate the image points and light rays are lines that intersect clearly at geometrical points. But in reality, if you were to examine such image points with a microscope, you would see structure in the “point,” a structure explained only when you invoke the true wave nature of light. In effect, t ...
... to locate the image points and light rays are lines that intersect clearly at geometrical points. But in reality, if you were to examine such image points with a microscope, you would see structure in the “point,” a structure explained only when you invoke the true wave nature of light. In effect, t ...
Absorption-induced trapping in an anisotropic
... ZQ715125C) as the base, which are joined using ultra-high-vacuum epoxy (TRA-BOND BA2116). The top of the cell is connected to a glass cylinder that is, in turn, connected to an ion pump and Rb dispenser casing via a glass-to-metal transition. Figure 1(a) shows a simplified diagram of the vacuum syst ...
... ZQ715125C) as the base, which are joined using ultra-high-vacuum epoxy (TRA-BOND BA2116). The top of the cell is connected to a glass cylinder that is, in turn, connected to an ion pump and Rb dispenser casing via a glass-to-metal transition. Figure 1(a) shows a simplified diagram of the vacuum syst ...
Physical basis of colors seen in Congo red-stained amyloid
... in practice various colors may be seen between accurately crossed polarizing filters, called polarizer and analyzer. Other colors are seen as the polarizer and analyzer are uncrossed and sometimes when the slide is rotated. Previously, there has been no satisfactory explanation of these properties. ...
... in practice various colors may be seen between accurately crossed polarizing filters, called polarizer and analyzer. Other colors are seen as the polarizer and analyzer are uncrossed and sometimes when the slide is rotated. Previously, there has been no satisfactory explanation of these properties. ...
2. Measurement of refractive index of liquids using fiber optic
... The paper describes a technique to determine the refractive index of liquids using reflective type fiber optic displacement sensor. The sensor consists of two multimode step index fibers and a mirror. The output light intensity from the receiving fiber is measured as a function of displacement of th ...
... The paper describes a technique to determine the refractive index of liquids using reflective type fiber optic displacement sensor. The sensor consists of two multimode step index fibers and a mirror. The output light intensity from the receiving fiber is measured as a function of displacement of th ...
Absolute length measurement of prismatic bodies with PTB´s new
... wedged beamsplitter plates (BS1,…,BS3), piezo-actuator controlled reference mirrors (RM1,RM2), apertures (PH1,PH2), achromatic lenses (L1,…,L5) and CCD cameras (Cam1,Cam2) In the reference arms, piezo-actuator controlled reference mirrors are used for phase-stepping interferometry. The two imaging a ...
... wedged beamsplitter plates (BS1,…,BS3), piezo-actuator controlled reference mirrors (RM1,RM2), apertures (PH1,PH2), achromatic lenses (L1,…,L5) and CCD cameras (Cam1,Cam2) In the reference arms, piezo-actuator controlled reference mirrors are used for phase-stepping interferometry. The two imaging a ...
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.