- Ophthalmology
... static depth of focus to the potentially dynamically achieved accommodation amplitude. The most objective way to evaluate whether A-IOLs are operating as expected by design is their direct intraocular visualization. Several studies have used high-frequency ultrasound biomicroscopy (UBM) to visualize ...
... static depth of focus to the potentially dynamically achieved accommodation amplitude. The most objective way to evaluate whether A-IOLs are operating as expected by design is their direct intraocular visualization. Several studies have used high-frequency ultrasound biomicroscopy (UBM) to visualize ...
Document
... Light from a point monochromatic source travel, towards two coherent sources S1 and S2, after passing interfere each other finally the waves are made to fall on to screen and visible pattern is obtained on to screen. At the center of the screen the waves from the two sources are in phase. As we move ...
... Light from a point monochromatic source travel, towards two coherent sources S1 and S2, after passing interfere each other finally the waves are made to fall on to screen and visible pattern is obtained on to screen. At the center of the screen the waves from the two sources are in phase. As we move ...
Alignment Procedures for Micro
... small geometry. The mechanical fixation elements are one or more dimensions larger than the micro-optical system. Consequently, the fixation of micro optics is done by adhesive bonding or laser soldering. Adhesive bonding Joining by adhesive bonding is the most common technology for the fixation of ...
... small geometry. The mechanical fixation elements are one or more dimensions larger than the micro-optical system. Consequently, the fixation of micro optics is done by adhesive bonding or laser soldering. Adhesive bonding Joining by adhesive bonding is the most common technology for the fixation of ...
A Novel Pulse Measurement System by Using Laser Triangulation and a CMOS Image Sensor
... Laser triangulation is normally used in conjunction with light centroid measuring devices, e.g. position sensing detectors (PSDs) and charge coupled devices (CCDs). Since the manufacturing technology behind the CMOS image sensors has now been advanced sufficiently to achieve good stability and low c ...
... Laser triangulation is normally used in conjunction with light centroid measuring devices, e.g. position sensing detectors (PSDs) and charge coupled devices (CCDs). Since the manufacturing technology behind the CMOS image sensors has now been advanced sufficiently to achieve good stability and low c ...
PPLN waveguide for quantum communication | SpringerLink
... two-photon source for quantum communication must be able to create entangled photons. One possible way to infer the two photon quantum state would be to reconstruct its density matrix [25]. Another possibility is to perform a Bell-type experiment and to infer the degree of entanglement via the measu ...
... two-photon source for quantum communication must be able to create entangled photons. One possible way to infer the two photon quantum state would be to reconstruct its density matrix [25]. Another possibility is to perform a Bell-type experiment and to infer the degree of entanglement via the measu ...
Acousto-Optic Devices and Applications
... power. This is referred to as the weak interaction (or small signal) approximation which is valid when the peak efficiency is below 70 percent. As acoustic power increases, the diffraction efficiency saturates and approaches 100 percent. Thus in the Bragg regime, complete depletion of the incident l ...
... power. This is referred to as the weak interaction (or small signal) approximation which is valid when the peak efficiency is below 70 percent. As acoustic power increases, the diffraction efficiency saturates and approaches 100 percent. Thus in the Bragg regime, complete depletion of the incident l ...
The Microscope in a Computer: Image Synthesis from Three
... we are almost always concerned with time averages of optical parameters such as intensity or polarization, because these are the only parameters that most optical instruments can measure. If an adequate statistical model is constructed for the random electromagnetic field, the average quantities mea ...
... we are almost always concerned with time averages of optical parameters such as intensity or polarization, because these are the only parameters that most optical instruments can measure. If an adequate statistical model is constructed for the random electromagnetic field, the average quantities mea ...
OFS Capabilities 09.qxp:Layout 1
... are now used in medical devices, material processing, micromachining, and high-power military applications. National security initiatives have also advanced specialty fiber development. The military is increasingly using highspeed communication systems on its aircraft, meaning optical fibers must be ...
... are now used in medical devices, material processing, micromachining, and high-power military applications. National security initiatives have also advanced specialty fiber development. The military is increasingly using highspeed communication systems on its aircraft, meaning optical fibers must be ...
Theoretical modeling and evaluation of the axial resolution of the
... The computations are centered on confocal pinhole diameters of 23 and 80 m, which are the Airy disk radius of the AOSLO and the confocal pinhole currently used in the AOSLO, respectively. The 23-m pinhole, which is the Airy disk radius, was chosen because that represents a pinhole size that will r ...
... The computations are centered on confocal pinhole diameters of 23 and 80 m, which are the Airy disk radius of the AOSLO and the confocal pinhole currently used in the AOSLO, respectively. The 23-m pinhole, which is the Airy disk radius, was chosen because that represents a pinhole size that will r ...
Doppler Effect on Light Reflected from Revolving Mirrors:
... However, there are, at least, four available arguments, within the theoretical framework of the emissive or ballistic hypothesis, that can be advanced against the correctness of the above Majorana's conclusion: Two arguments based on the Galilean principle of relativity; one argument based on the an ...
... However, there are, at least, four available arguments, within the theoretical framework of the emissive or ballistic hypothesis, that can be advanced against the correctness of the above Majorana's conclusion: Two arguments based on the Galilean principle of relativity; one argument based on the an ...
Vanadium Dioxide - Vanderbilt`s ETD Server
... MECHANISMS OF NONLINEAR INDEX The nonlinear index can be observed via several mechanisms including electronic polarization, thermal effects, and electrostriction. Electronic nonlinearities arise due to the distortion of the electron cloud by the applied electric field. In dielectric materials, this ...
... MECHANISMS OF NONLINEAR INDEX The nonlinear index can be observed via several mechanisms including electronic polarization, thermal effects, and electrostriction. Electronic nonlinearities arise due to the distortion of the electron cloud by the applied electric field. In dielectric materials, this ...
Light emitting devices based on silicon nanostructures
... For future applications on optoelectronic interconnects it is necessary to have a material in which light can be generated, guided, modulated, amplified and detected. Silicon is characterized by an indirect bandgap, it is therefore not suitable in its bulk form for the implementation of fundamental ...
... For future applications on optoelectronic interconnects it is necessary to have a material in which light can be generated, guided, modulated, amplified and detected. Silicon is characterized by an indirect bandgap, it is therefore not suitable in its bulk form for the implementation of fundamental ...
Template for Electronic Submission to ACS Journals
... passive optical devices.1 Such structures, also known as distributed Bragg reflectors, acquire their optical properties through the periodic modulation of the refractive index, so they are also classified as one-dimensional photonic crystals (1DPC). Many applications of these materials can be found ...
... passive optical devices.1 Such structures, also known as distributed Bragg reflectors, acquire their optical properties through the periodic modulation of the refractive index, so they are also classified as one-dimensional photonic crystals (1DPC). Many applications of these materials can be found ...
Press Release Volk Eye Check - Contact Lens Module Jan 2015
... Volk Optical (www.volk.com) is an industry leader in aspheric optics and diagnostic imaging. Glass lens construction and the company’s patented double aspheric technology result in the highest resolution imaging with the best stereopsis for precision diagnostic, therapeutic and surgical work. Volk’s ...
... Volk Optical (www.volk.com) is an industry leader in aspheric optics and diagnostic imaging. Glass lens construction and the company’s patented double aspheric technology result in the highest resolution imaging with the best stereopsis for precision diagnostic, therapeutic and surgical work. Volk’s ...
Practical aspects of Microscopy
... too small to be easily viewed by the human eye. Viewing and studying objects that range in size from millimeters (1 mm = 10-3 meter) to nanometers (1 nm = 10-9 meter) intrigues everyone and is currently applied to every field of science and technology in use today. Microscopes, devices which magnify ...
... too small to be easily viewed by the human eye. Viewing and studying objects that range in size from millimeters (1 mm = 10-3 meter) to nanometers (1 nm = 10-9 meter) intrigues everyone and is currently applied to every field of science and technology in use today. Microscopes, devices which magnify ...
Evolutionary optimization of layouts for high density free space
... 3. The reflection angles have to lie in the range from 32◦ to 43◦ to assure total reflection. The angle β and the number of folding intervals nF I can be set independently for each beam in the network. Condition 2 is the reason for the zig-zag paths of the beams. In this way it is possible to adjust t ...
... 3. The reflection angles have to lie in the range from 32◦ to 43◦ to assure total reflection. The angle β and the number of folding intervals nF I can be set independently for each beam in the network. Condition 2 is the reason for the zig-zag paths of the beams. In this way it is possible to adjust t ...
Operative Correction of Ocular Aberrations to Improve Visual Acuity
... Journal of Refractive Surgery Volume 16 September/October 2000 ...
... Journal of Refractive Surgery Volume 16 September/October 2000 ...
Wormald Coupland On measuring 3D flow within inkjet droplet
... cylinder of an optical engine [9] and phase conjugation and ray tracing techniques have been used in similar measurements using holographic PIV (HPIV) [10]. This work shows that if the optical distortion or aberration is known then it can be compensated; however, a clear requirement for a non-intrus ...
... cylinder of an optical engine [9] and phase conjugation and ray tracing techniques have been used in similar measurements using holographic PIV (HPIV) [10]. This work shows that if the optical distortion or aberration is known then it can be compensated; however, a clear requirement for a non-intrus ...
Polarization Optics Tutorial: Polarizers, Waveplates, Rotators, and
... that incident polarized light may be resolved into components projected along the optic axis and perpendicular to it. These two components will experience a relative phase shift (retardation) proportional to the thickness of the plate. When the fractional part of this retardation is a nonzero value, ...
... that incident polarized light may be resolved into components projected along the optic axis and perpendicular to it. These two components will experience a relative phase shift (retardation) proportional to the thickness of the plate. When the fractional part of this retardation is a nonzero value, ...
Simultaneous trapping of low-index and high
... manner. A conventional optical trap uses a highly focused TEM00 Gaussian beam to attract a high-index particle into the bright focal region of the beam. In contrast, low-index particles are expelled from the beam. Several reports have shown that a doughnut-type (or vortex) beam is more efficient tha ...
... manner. A conventional optical trap uses a highly focused TEM00 Gaussian beam to attract a high-index particle into the bright focal region of the beam. In contrast, low-index particles are expelled from the beam. Several reports have shown that a doughnut-type (or vortex) beam is more efficient tha ...
Silicon-on-Insulator Grating Duplexer for Fiber-to-the
... duplexing operation and fiber-to-chip interfacing is presented in figure 1. It consists of a one-dimensional grating structure defined on an SOI waveguide platform. The single mode optical fiber is tilted by an angle θ with respect to the vertical axis. While in standard fiber-to-waveguide grating c ...
... duplexing operation and fiber-to-chip interfacing is presented in figure 1. It consists of a one-dimensional grating structure defined on an SOI waveguide platform. The single mode optical fiber is tilted by an angle θ with respect to the vertical axis. While in standard fiber-to-waveguide grating c ...
Neutron reflection: Principles and examples of applications
... of any material is a function of the scattering length density of its constituent nuclei and the neutron wavelength. As with light, total reflection may occur when neutrons pass from a medium of higher refractive index to one of lower refractive index. Since the neutron refractive indices of most co ...
... of any material is a function of the scattering length density of its constituent nuclei and the neutron wavelength. As with light, total reflection may occur when neutrons pass from a medium of higher refractive index to one of lower refractive index. Since the neutron refractive indices of most co ...
Laser Cutting
... and reflected light in a laser pickup. Using a quarter-wave plate, the plane of polarisation of light leaving the pickup will have been turned 45o, and on return it will be rotated a further 45o, so that it is now at right angles to the plane of polarisation of light from the source. The two can ea ...
... and reflected light in a laser pickup. Using a quarter-wave plate, the plane of polarisation of light leaving the pickup will have been turned 45o, and on return it will be rotated a further 45o, so that it is now at right angles to the plane of polarisation of light from the source. The two can ea ...
New generation position encoders for harsh environments
... New generation position encoders for harsh environments ...
... New generation position encoders for harsh environments ...
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.