MICROSCOPY
... eye which is an organ acts as an instrument in the human optical system. The resolution of the human eye is 1 arcminute. It means that in the normal visual range (~250 mm) the eye is able to detect a ~0.1 mm pixel (depending on the personal capabilities). So to see smaller objects than that with the ...
... eye which is an organ acts as an instrument in the human optical system. The resolution of the human eye is 1 arcminute. It means that in the normal visual range (~250 mm) the eye is able to detect a ~0.1 mm pixel (depending on the personal capabilities). So to see smaller objects than that with the ...
Reporting Acuity Outcomes and Refractive Accuracy After LASIK
... conducted in the United States, and posted on the U.S. Food and Drug Administration’s official web site.2 In our experience in Europe with a more advanced (as far as frequency and tracker response time) subsequent excimer laser model (WaveLight EX500; Alcon Surgical), this may be the result of addre ...
... conducted in the United States, and posted on the U.S. Food and Drug Administration’s official web site.2 In our experience in Europe with a more advanced (as far as frequency and tracker response time) subsequent excimer laser model (WaveLight EX500; Alcon Surgical), this may be the result of addre ...
Design Considerations and Performance Comparison of High-Order Modulation Formats using OFDM
... Orthogonal Frequency Division Multiplexing (OFDM) is currently considered as an interesting alternative transmission scheme in optical communications [1-4]. This holds not only for long haul high-capacity networks, but also for the metro and even the access network. There are two strategies for tran ...
... Orthogonal Frequency Division Multiplexing (OFDM) is currently considered as an interesting alternative transmission scheme in optical communications [1-4]. This holds not only for long haul high-capacity networks, but also for the metro and even the access network. There are two strategies for tran ...
Optical fibres
... There can be undesired reflection between transmitter lasers to the external modulator. To avoid the consequence as reflection this improves laser emission spectrum. Further, it causes quality deterioration which causes quality of transmission. To avoid above, a optical isolation is used across exte ...
... There can be undesired reflection between transmitter lasers to the external modulator. To avoid the consequence as reflection this improves laser emission spectrum. Further, it causes quality deterioration which causes quality of transmission. To avoid above, a optical isolation is used across exte ...
Get PDF - OSA Publishing
... which provides a historical context for the development of the field as a whole [15]; and reviews by Hell [16] and Schermelleh [17], which compare the physical principles of various nanoscopy methods. The fundamental criteria for achieving superresolution in continuously labeled samples are lucidly ...
... which provides a historical context for the development of the field as a whole [15]; and reviews by Hell [16] and Schermelleh [17], which compare the physical principles of various nanoscopy methods. The fundamental criteria for achieving superresolution in continuously labeled samples are lucidly ...
- Centre For Eye Health
... night vision is getting worse although remarked that it was improved by spectacles. Family ocular history includes optic neuritis (mother). Best corrected acuities were 6/4.8 OD and 6/7.6+2 OS with a low hyperopic script. Pupils were equal, round and reactive to light in both eyes. Amsler Grid was u ...
... night vision is getting worse although remarked that it was improved by spectacles. Family ocular history includes optic neuritis (mother). Best corrected acuities were 6/4.8 OD and 6/7.6+2 OS with a low hyperopic script. Pupils were equal, round and reactive to light in both eyes. Amsler Grid was u ...
LABORATORY TECHNIQUES
... of an incident beam, reflections from the two surfaces will interfere with each other, as shown in Fig. 2. When the beam is collimated, i.e. a plane wave, the interference pattern will have a large uniform central area since the two reflected plane waves are traveling parallel to each other. ...
... of an incident beam, reflections from the two surfaces will interfere with each other, as shown in Fig. 2. When the beam is collimated, i.e. a plane wave, the interference pattern will have a large uniform central area since the two reflected plane waves are traveling parallel to each other. ...
Modulation Transfer Function
... Figure 3: A diffraction-limited and an aberrated focal spot intensity distribution. The aberrated spot is broadened, and consequently its peak intensity is lower than the diffraction-limited peak intensity. A measure of image quality is the Strehl ratio. Two example intensity curves are shown in Fig ...
... Figure 3: A diffraction-limited and an aberrated focal spot intensity distribution. The aberrated spot is broadened, and consequently its peak intensity is lower than the diffraction-limited peak intensity. A measure of image quality is the Strehl ratio. Two example intensity curves are shown in Fig ...
Measuring the Complete Transverse Spatial Mode Spectrum
... by laser devices, is fundamental in optimizing applications as well as in research, both in classical and quantum optics. Many imaging techniques, for instance, are based on the possibility to determine transformations induced by optical elements by knowing the effects on the spatial spectral compon ...
... by laser devices, is fundamental in optimizing applications as well as in research, both in classical and quantum optics. Many imaging techniques, for instance, are based on the possibility to determine transformations induced by optical elements by knowing the effects on the spatial spectral compon ...
Guiding and Confining Light in Void Nanostructure
... presents optical properties similar to those of the TM eigenmode in the studied slab-based slot-waveguide structure. We numerically simulated the quasi-TE eigenmode of the slot-waveguide structure shown in Fig. 1(b) using a full-vectorial finite difference mode solver [12]. Non-uniform grid mesh is ...
... presents optical properties similar to those of the TM eigenmode in the studied slab-based slot-waveguide structure. We numerically simulated the quasi-TE eigenmode of the slot-waveguide structure shown in Fig. 1(b) using a full-vectorial finite difference mode solver [12]. Non-uniform grid mesh is ...
Monolithic integration of optical waveguide and
... Lab-on-a-chip devices have benefitted from the ability to combine optical features and fluidic features in a common optofluidic device. In many approaches to integrating these features, optical waveguides are formed using complex procedures that involve creating the waveguide from separate materials ...
... Lab-on-a-chip devices have benefitted from the ability to combine optical features and fluidic features in a common optofluidic device. In many approaches to integrating these features, optical waveguides are formed using complex procedures that involve creating the waveguide from separate materials ...
Measurement of transparent plates with
... A common problem in optical surface profiling is spurious reflections, such as are encountered when the flatness of a transparent plate is tested in a Fizeau interferometer.1 Unwanted interference effects arising from backsurface reflections result in the complex mixture of fringes shown in Fig. 1. ...
... A common problem in optical surface profiling is spurious reflections, such as are encountered when the flatness of a transparent plate is tested in a Fizeau interferometer.1 Unwanted interference effects arising from backsurface reflections result in the complex mixture of fringes shown in Fig. 1. ...
Hooman Mohseni - Center for Detectors
... the past six years. These include detailed explanation of the concept, evaluation of single-element devices to understand the physics of this device, and demonstration of the first nano-injection imaging arrays. In particular, I will explain the reasons for unusually low noise of the device at a hig ...
... the past six years. These include detailed explanation of the concept, evaluation of single-element devices to understand the physics of this device, and demonstration of the first nano-injection imaging arrays. In particular, I will explain the reasons for unusually low noise of the device at a hig ...
File - International Journal of Scientific Study
... spectral-domain OCT is an important tool for assessment of extent, progression, and resolution of macular holes. It yields valuable information regarding the ultrastructural changes at the vitreomacular interface and within the retinal layers.5 The stage 1 impending macular holes are observed and no ...
... spectral-domain OCT is an important tool for assessment of extent, progression, and resolution of macular holes. It yields valuable information regarding the ultrastructural changes at the vitreomacular interface and within the retinal layers.5 The stage 1 impending macular holes are observed and no ...
MICROWAVE OPTICS – THE MEASUREMENTS OF THE
... Generally speaking interference it is the phenomenon resulting from the meeting of two or more waves (coexisting in the space and time), with an increase in intensity at some points (where waves are in phase) and a decrease at others (where waves are out of phase). It is important that the result of ...
... Generally speaking interference it is the phenomenon resulting from the meeting of two or more waves (coexisting in the space and time), with an increase in intensity at some points (where waves are in phase) and a decrease at others (where waves are out of phase). It is important that the result of ...
Relativistic corrections in displacement measuring
... case of a single reflection from a mirror that moves arbitrarily within a plane. Next we consider the case of a multiple-pass interferometer and the effects of varying optical path lengths due to the mirror motion. Relativistic corrections are discussed for realistic velocity profile examples. II. H ...
... case of a single reflection from a mirror that moves arbitrarily within a plane. Next we consider the case of a multiple-pass interferometer and the effects of varying optical path lengths due to the mirror motion. Relativistic corrections are discussed for realistic velocity profile examples. II. H ...
3.0Mb PDF - David Kleinfeld
... accelerated to relativistic speeds (as occurs at the highest laboratory laser fields), the rules of quantum mechanics can be used. We start here. QM description: ...
... accelerated to relativistic speeds (as occurs at the highest laboratory laser fields), the rules of quantum mechanics can be used. We start here. QM description: ...
Total Internal Reflection and Critical Angle File
... • They can carry much more data •Light signals are switched rapidly using pulsed lasers to encode information rather than fluctuating electric currents. •Unlike currents the signals do not interfere with each other •Less data loss occurs •They are immune from e.m. interference ...
... • They can carry much more data •Light signals are switched rapidly using pulsed lasers to encode information rather than fluctuating electric currents. •Unlike currents the signals do not interfere with each other •Less data loss occurs •They are immune from e.m. interference ...
acknowledgements
... 150 m pixel separation and a hole diameter of about 20 m. One such example pattern is shown in Figure 3a. To minimize the deformation of the IR-generated DOE during the reconstruction process, polymer films were aluminized after the hole pattern had been written in them. Aluminum film was used due ...
... 150 m pixel separation and a hole diameter of about 20 m. One such example pattern is shown in Figure 3a. To minimize the deformation of the IR-generated DOE during the reconstruction process, polymer films were aluminized after the hole pattern had been written in them. Aluminum film was used due ...
Downloaded
... The photocurrent characteristics of a diarylethene (DAE) film were investigated. The photocurrents were attributed to the dissociation of electric carriers from the excited molecules in the DAE film. We demonstrated the on-off property of the photocurrent according to the isomerization state. Result ...
... The photocurrent characteristics of a diarylethene (DAE) film were investigated. The photocurrents were attributed to the dissociation of electric carriers from the excited molecules in the DAE film. We demonstrated the on-off property of the photocurrent according to the isomerization state. Result ...
Total 3D imaging of phase objects using defocusing microscopy
... Transparent objects that would be invisible in a standard bright-field optical microscope can turn visible by defocusing the microscope, since the act of defocusing introduces a phase difference between the diffracted orders and the non-diffracted transmitted order (zero order). From contrast intens ...
... Transparent objects that would be invisible in a standard bright-field optical microscope can turn visible by defocusing the microscope, since the act of defocusing introduces a phase difference between the diffracted orders and the non-diffracted transmitted order (zero order). From contrast intens ...
Tuning the polarization state of light via time retardation with...
... phase information are obtained by mapping the light scattered from the dielectric silicon tip with a pseudoheterodyne interferometer24 simultaneously with the topography imaging. Background signals are suppressed by oscillating the tip vertically at a frequency and by demodulating the detector sig ...
... phase information are obtained by mapping the light scattered from the dielectric silicon tip with a pseudoheterodyne interferometer24 simultaneously with the topography imaging. Background signals are suppressed by oscillating the tip vertically at a frequency and by demodulating the detector sig ...
Laser safety - Focus Technologies LLC
... longer than about 1400 nm is absorbed by the transparent parts of the eye before it reaches the retina, which means that the MPE for these wavelengths is higher than for visible light. In addition to the wavelength and exposure time, the MPE takes into account the spatial distribution of the light ( ...
... longer than about 1400 nm is absorbed by the transparent parts of the eye before it reaches the retina, which means that the MPE for these wavelengths is higher than for visible light. In addition to the wavelength and exposure time, the MPE takes into account the spatial distribution of the light ( ...
A Laser Coupler for DVD/CD Playback
... The DVD system is now being widely used in playback optical disc systems, such as DVDvideo players and DVD-ROM drives. In the DVD system, it is important that the optical pickup of the system can play back both DVD media and CD media such as CD-DA, CD-ROM and CD-R/RW. But the 650nm laser cannot be u ...
... The DVD system is now being widely used in playback optical disc systems, such as DVDvideo players and DVD-ROM drives. In the DVD system, it is important that the optical pickup of the system can play back both DVD media and CD media such as CD-DA, CD-ROM and CD-R/RW. But the 650nm laser cannot be u ...
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.