Three-Dimensional Imaging and Processing Using Computational
... the superposition of a reference beam and the beam scattered by an object [24]. The 3-D information about the object is contained in the phase of the object beam. Following the principle of interferometry, this information is present in the intensity of the hologram that is captured by the camera. T ...
... the superposition of a reference beam and the beam scattered by an object [24]. The 3-D information about the object is contained in the phase of the object beam. Following the principle of interferometry, this information is present in the intensity of the hologram that is captured by the camera. T ...
Two-Mirror Apodization for High-Contrast Imaging
... uniform-intensity beam to one of nonuniform intensity—that is, an apodized exit beam. The motivation for their work was to “mask” the secondary mirror in designs of large twomirror telescopes with fast spherical primaries. As an application of the idea, they point to radio and submillimeter-wave tel ...
... uniform-intensity beam to one of nonuniform intensity—that is, an apodized exit beam. The motivation for their work was to “mask” the secondary mirror in designs of large twomirror telescopes with fast spherical primaries. As an application of the idea, they point to radio and submillimeter-wave tel ...
Quasi Light Fields: Extending the Light Field to Coherent Radiation
... Our paper is organized as follows. We describe the traditional light field in Section 2. We formulate quasi light fields in Section 3 by reviewing and relating the relevant research in optics, quantum physics, and signal processing. In Section 4, we describe how to capture quasi light fields, discus ...
... Our paper is organized as follows. We describe the traditional light field in Section 2. We formulate quasi light fields in Section 3 by reviewing and relating the relevant research in optics, quantum physics, and signal processing. In Section 4, we describe how to capture quasi light fields, discus ...
Nanowire Grid Polarizers for Mid- and Long-Wavelength
... The wire grid polarizer (WGP) remains one of the most useful optical components in the field and is prevalent in applications ranging from imaging and displays to communications and scientific instrumentation. The WGP typically consists of an array of metallic lines with sub-wavelength pitch support ...
... The wire grid polarizer (WGP) remains one of the most useful optical components in the field and is prevalent in applications ranging from imaging and displays to communications and scientific instrumentation. The WGP typically consists of an array of metallic lines with sub-wavelength pitch support ...
ray optics and optical instruments
... the image A′B′ (in this case, real) of an object A B formed by a concave mirror. It does not mean that only three rays emanate from the point A. An infinite number of rays emanate from any source, in all directions. Thus, point A′ is image point of A if every ray originating at point A and falling o ...
... the image A′B′ (in this case, real) of an object A B formed by a concave mirror. It does not mean that only three rays emanate from the point A. An infinite number of rays emanate from any source, in all directions. Thus, point A′ is image point of A if every ray originating at point A and falling o ...
Periodically Poled Lithium Niobate (PPLN) - Tutorial
... crystals or matched external cavities, which are needed with conventional doubling crystals. The power handling is excellent for infrared pump and output wavelengths (e.g. SHG of 1550nm → 775nm); however, when using PPLN to frequency double into the visible, the power handling ability of the crystal ...
... crystals or matched external cavities, which are needed with conventional doubling crystals. The power handling is excellent for infrared pump and output wavelengths (e.g. SHG of 1550nm → 775nm); however, when using PPLN to frequency double into the visible, the power handling ability of the crystal ...
FINCH: Fresnel Incoherent Correlation Hologram
... Holographic imaging offers a reliable and fast method to capture the complete threedimensional (3D) information of the scene from a single perspective. However, holography is not widely applied to the regime of white-light imaging, because white-light is incoherent and in general creating holograms ...
... Holographic imaging offers a reliable and fast method to capture the complete threedimensional (3D) information of the scene from a single perspective. However, holography is not widely applied to the regime of white-light imaging, because white-light is incoherent and in general creating holograms ...
The Vision - Legacy Health
... Telemedicine refers to the electronic transfer of information for the purpose of providing medical care. It can improve access to health care, especially for those in rural areas. In ophthalmology, telemedicine is most often used to screen for diabetic retinopathy. Diabetic retinopathy (DR) is a dis ...
... Telemedicine refers to the electronic transfer of information for the purpose of providing medical care. It can improve access to health care, especially for those in rural areas. In ophthalmology, telemedicine is most often used to screen for diabetic retinopathy. Diabetic retinopathy (DR) is a dis ...
Observational Astronomy
... Tracking must be very smooth Sources of vibration: mechanical noise and wind Higher vibration frequencies have lower amplitude Important design goal: make resonance frequencies of the telescope as high as possible (>10 Hz) ...
... Tracking must be very smooth Sources of vibration: mechanical noise and wind Higher vibration frequencies have lower amplitude Important design goal: make resonance frequencies of the telescope as high as possible (>10 Hz) ...
Comparison of retinal nerve fiber layer thickness between normal
... thickness, signal strength and binocular symmetry were displayed. To make sure the accuracy of the results, only the signal strength higher than 6 of image was accepted in our study. Statistical analysis Data was analyzed with by SPSS 17.0 (SPSS Inc., Chicago, IL, USA). All data ran the normal distr ...
... thickness, signal strength and binocular symmetry were displayed. To make sure the accuracy of the results, only the signal strength higher than 6 of image was accepted in our study. Statistical analysis Data was analyzed with by SPSS 17.0 (SPSS Inc., Chicago, IL, USA). All data ran the normal distr ...
Quantitative Phase Imaging
... interferes (i.e., creates fringes) with its shifted replicas. In other words, these parameters indicate the spatiotemporal scale over which the phase of an interference pattern can be measured. For example, a quantitative phase image can only be measured experimentally within the coherence area of t ...
... interferes (i.e., creates fringes) with its shifted replicas. In other words, these parameters indicate the spatiotemporal scale over which the phase of an interference pattern can be measured. For example, a quantitative phase image can only be measured experimentally within the coherence area of t ...
EBSD SEM TEM
... Def: Resolution is the minimum distance between two points from which they still can be recognized as 2 points; One method is to illuminate the object over its entire surface by using a suitable source of radiation (photons, electrons or ions) and use a lens arrangement to form an image, by focusi ...
... Def: Resolution is the minimum distance between two points from which they still can be recognized as 2 points; One method is to illuminate the object over its entire surface by using a suitable source of radiation (photons, electrons or ions) and use a lens arrangement to form an image, by focusi ...
Dispersion Compensating Fiber Module
... developmental challenges. These two demands have different properties; thus, it is difficult to achieve both demands simultaneously. As a result, each of the new SC-DCF has been individually developed to meet these requirements. It is found that the newly developed SCDCF modules have high performanc ...
... developmental challenges. These two demands have different properties; thus, it is difficult to achieve both demands simultaneously. As a result, each of the new SC-DCF has been individually developed to meet these requirements. It is found that the newly developed SCDCF modules have high performanc ...
In text you refer to OAP mirrors as 2nd etc, In fig, they are labeled
... Accelerator Laboratory occur on the order of tens of femtoseconds and cannot be directly measured with conventional means. The length of the pulses can instead be reconstructed by measuring the spectrum of optical transition radiation emitted by the electrons as they move toward a conducting foil. B ...
... Accelerator Laboratory occur on the order of tens of femtoseconds and cannot be directly measured with conventional means. The length of the pulses can instead be reconstructed by measuring the spectrum of optical transition radiation emitted by the electrons as they move toward a conducting foil. B ...
Telescopes and spectrographs
... Achieving high magnification with a telescope requires a long focal length fo, but limits on the maximum possible value of fo are set by the need to make the whole instrument movable. It is clear from Figure 3 that the physical length of a Keplerian refracting telescope cannot be less than fo. Hence ...
... Achieving high magnification with a telescope requires a long focal length fo, but limits on the maximum possible value of fo are set by the need to make the whole instrument movable. It is clear from Figure 3 that the physical length of a Keplerian refracting telescope cannot be less than fo. Hence ...
Optical Resonators and Mode Matching
... trivial at first. Over time an optics expert simply becomes good at it. Second, as is discussed below, the process of mode matching a laser beam to a resonator is also not trivial for firsttime students. The main reason is that there is no unique solution to the problem –there are many possible ways ...
... trivial at first. Over time an optics expert simply becomes good at it. Second, as is discussed below, the process of mode matching a laser beam to a resonator is also not trivial for firsttime students. The main reason is that there is no unique solution to the problem –there are many possible ways ...
Cisco Presentation Guide
... proper training. Fiber fragments that become embedded under the skin can be extremely painful, and are very difficult (in some cases impossible) to remove. Remember: Optical equipment is typically powered from either 120vac or 48vdc. Always remove jewelry such as rings, watches, bracelets, etc…when ...
... proper training. Fiber fragments that become embedded under the skin can be extremely painful, and are very difficult (in some cases impossible) to remove. Remember: Optical equipment is typically powered from either 120vac or 48vdc. Always remove jewelry such as rings, watches, bracelets, etc…when ...
Characterizing Multiplexing and Diversity in Visual MIMO Ashwin Ashok , Marco Gruteser
... receiver, the image of the LEA transmit elements captured by the camera spans one pixel or multiple pixels. Further, the image plane is spanned by images of each transmit element clearly delineated and the size of image span depending on the focus (concentration ratio) of the camera. As illustrated ...
... receiver, the image of the LEA transmit elements captured by the camera spans one pixel or multiple pixels. Further, the image plane is spanned by images of each transmit element clearly delineated and the size of image span depending on the focus (concentration ratio) of the camera. As illustrated ...
Dynamic Morphology of Clear Corneal Cataract Incisions - F
... modality for high-resolution (2–10 m) imaging of in vivo biologic tissue. It is similar to ultrasound imaging, except near infrared light is used instead of sound waves. This nondestructive, noncontact method for imaging tissue in situ takes advantage of the short coherence length of broadband ligh ...
... modality for high-resolution (2–10 m) imaging of in vivo biologic tissue. It is similar to ultrasound imaging, except near infrared light is used instead of sound waves. This nondestructive, noncontact method for imaging tissue in situ takes advantage of the short coherence length of broadband ligh ...
PDF
... depletion mode, where carriers are extracted rather than injected [4]–[6] and high-speed operation (30 GHz) has been obtained. However, without a p-n junction tailored to run in depletion mode in a tightly confined structure, these structures suffer from very small changes in refractive index, resul ...
... depletion mode, where carriers are extracted rather than injected [4]–[6] and high-speed operation (30 GHz) has been obtained. However, without a p-n junction tailored to run in depletion mode in a tightly confined structure, these structures suffer from very small changes in refractive index, resul ...
Enhancing four-wave-mixing processes by nanowire arrays coupled to a gold film Ekaterina Poutrina,
... where the indices R and T refer to the waves for the generated FWM field, in air and inside the metal, respectively, and S to the nonlinear source field inside the medium [14, 38]. A contour map showing the FWM efficiency at ω3 calculated according to Eq. (2) is shown in Fig. 2(a). An increase in th ...
... where the indices R and T refer to the waves for the generated FWM field, in air and inside the metal, respectively, and S to the nonlinear source field inside the medium [14, 38]. A contour map showing the FWM efficiency at ω3 calculated according to Eq. (2) is shown in Fig. 2(a). An increase in th ...
Polarized Light Assessment of Complex Turbid
... formidable challenges. Multiple scattering causes extensive depolarization that confounds the established techniques. Further, even if some residual polarization signal can be measured, multiple scattering also alters the polarization state, for example by scattering-induced diattenuation and by sca ...
... formidable challenges. Multiple scattering causes extensive depolarization that confounds the established techniques. Further, even if some residual polarization signal can be measured, multiple scattering also alters the polarization state, for example by scattering-induced diattenuation and by sca ...
TIE-41 Large Optical Glass Blanks
... After a first inspection for striae, bubbles and inclusions, the glass blank will be fineannealed. This is the most time-consuming process in the production of large optical glass blanks. The fine-annealing process determines the final refractive index, the optical homogeneity and the stress birefri ...
... After a first inspection for striae, bubbles and inclusions, the glass blank will be fineannealed. This is the most time-consuming process in the production of large optical glass blanks. The fine-annealing process determines the final refractive index, the optical homogeneity and the stress birefri ...
Lab 8: Polarization of Light
... retarder; linear polarization is thus converted to elliptical polarization due to the arbitrary phase shift. The phase difference depends on the incident wavelength, the refractive indices (along the two different directhey don’t reduce the intensity of the incident light tions) and the thickness of ...
... retarder; linear polarization is thus converted to elliptical polarization due to the arbitrary phase shift. The phase difference depends on the incident wavelength, the refractive indices (along the two different directhey don’t reduce the intensity of the incident light tions) and the thickness of ...
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.