Experiment 24 - School of Physics
... Figure 24-1 shows the layout of the Michelson interferometer used in this experiment. The mirrors, beamsplitter and compensator plate are mounted on a marble slab for stability. The apparatus is housed in a clear plastic box to exclude drafts and to keep the optics clean. Light from the source is sp ...
... Figure 24-1 shows the layout of the Michelson interferometer used in this experiment. The mirrors, beamsplitter and compensator plate are mounted on a marble slab for stability. The apparatus is housed in a clear plastic box to exclude drafts and to keep the optics clean. Light from the source is sp ...
Measurement considerations when specifying
... coating doesn’t meet the specification for the mirror (see Fig. 1b). Measuring specular performance Spectrophotometers are the primary measurement tool in most optical ...
... coating doesn’t meet the specification for the mirror (see Fig. 1b). Measuring specular performance Spectrophotometers are the primary measurement tool in most optical ...
PDF
... makes it difficult to precisely measure optical power within and between integrated devices. In addition, as the number and density of devices on a single chip grows, heat dissipation and thermal effects, such as thermal cross-talk and SOA gain reduction, become increasingly important issues that ca ...
... makes it difficult to precisely measure optical power within and between integrated devices. In addition, as the number and density of devices on a single chip grows, heat dissipation and thermal effects, such as thermal cross-talk and SOA gain reduction, become increasingly important issues that ca ...
Omnidirectional Reflection from a One-Dimensional Photonic Crystal,
... is plotted as a dashed curve, which is very close (always within 2% in the indices of refraction) to the numerically optimized contour. It can be seen from Fig. 4 that, for omnidirectional ref lection, the index ratio should be reasonably high s.1.5d and the indices themselves somewhat higher (by .1 ...
... is plotted as a dashed curve, which is very close (always within 2% in the indices of refraction) to the numerically optimized contour. It can be seen from Fig. 4 that, for omnidirectional ref lection, the index ratio should be reasonably high s.1.5d and the indices themselves somewhat higher (by .1 ...
Quantum Interference 1 Claude Cohen-Tannoudji Scott Lectures Cambridge, March 7
... and can be adjusted to vanish for v=0. Atoms with zero are in dark states and thus protected from the « bad effects » of light (random recoils due to the spontaneous emission processes). - Atoms with non zero velocity are no longer dark because the Doppler shift changes. They absorb light and the ve ...
... and can be adjusted to vanish for v=0. Atoms with zero are in dark states and thus protected from the « bad effects » of light (random recoils due to the spontaneous emission processes). - Atoms with non zero velocity are no longer dark because the Doppler shift changes. They absorb light and the ve ...
Optical coupling devices
... with the angle 0 de?ned as before. The factor \fgarises because the roof prism is tilted away from the normal. Useful devices may be made from these (any of The six possible spots are obtained by adding the 3 FIGS. 1-4 in some cases) using extra components. For example the use of a Fresnel bi-prism, ...
... with the angle 0 de?ned as before. The factor \fgarises because the roof prism is tilted away from the normal. Useful devices may be made from these (any of The six possible spots are obtained by adding the 3 FIGS. 1-4 in some cases) using extra components. For example the use of a Fresnel bi-prism, ...
IOSR Journal of Electrical and Electronics Engineering (IOSRJEEE)
... over multimode fiber system (ROMMF) has gained much attention recently for its suitability to deliver highpurity signals in analog and digital format for short-reach coverage such as wireless local area networks and ultrawideband radio signals [2]. COFDM has been specified for digital broadcasting s ...
... over multimode fiber system (ROMMF) has gained much attention recently for its suitability to deliver highpurity signals in analog and digital format for short-reach coverage such as wireless local area networks and ultrawideband radio signals [2]. COFDM has been specified for digital broadcasting s ...
Optical Isolation Can Occur In Linear And Passive Silicon
... crystal gratings [19]. Former study has shown that the grating structure can cause the one-way transmission effect in two-dimensional system, which could be used for designing optical diodes [19]. Also, the same question is asked: Can this grating structure be used to construct a good isolator? To h ...
... crystal gratings [19]. Former study has shown that the grating structure can cause the one-way transmission effect in two-dimensional system, which could be used for designing optical diodes [19]. Also, the same question is asked: Can this grating structure be used to construct a good isolator? To h ...
optical properties of dielectric mirrors, produced by large area glass
... wet coating and Physical Vapor Deposition (PVD) coating. In case of wet coating, the metal used as reflective substrate is silver. It is deposited onto the glass surface, via certain chemical process as result of chemical reaction of two chemicals. The deposited Ag is protected (covered) by Cu, and ...
... wet coating and Physical Vapor Deposition (PVD) coating. In case of wet coating, the metal used as reflective substrate is silver. It is deposited onto the glass surface, via certain chemical process as result of chemical reaction of two chemicals. The deposited Ag is protected (covered) by Cu, and ...
Types of polarization
... An optical device whose input is natural light and whose output is some form of polarized light is called a polarizer. The physical mechanisms used for this purpose are dichroism or selective absorption, scattering, reflection and birefringence or double refraction. Birefringence is due to strains a ...
... An optical device whose input is natural light and whose output is some form of polarized light is called a polarizer. The physical mechanisms used for this purpose are dichroism or selective absorption, scattering, reflection and birefringence or double refraction. Birefringence is due to strains a ...
Inter 1-4
... Loyd Mirror •Division of amplitude ( Intensity) Thin film interference Note: In practice it is not possible to get independent two sources which are coherent. But two virtual sources formed from one single source can act as Coherent sources. ...
... Loyd Mirror •Division of amplitude ( Intensity) Thin film interference Note: In practice it is not possible to get independent two sources which are coherent. But two virtual sources formed from one single source can act as Coherent sources. ...
Computational photography with plenoptic camera and light field
... been explored for many forms of imaging, notably for machine vision inspection and biomedical applications. For instance, structured illumination with phase-shifting algorithms allows for high-resolution height measurement of the object under inspection [8–10]. Phase diversity is a powerful techniqu ...
... been explored for many forms of imaging, notably for machine vision inspection and biomedical applications. For instance, structured illumination with phase-shifting algorithms allows for high-resolution height measurement of the object under inspection [8–10]. Phase diversity is a powerful techniqu ...
Nonlinear photoacoustic spectroscopy of hemoglobin
... a motor placed on top of the sample holder (not shown in Fig. 1(a)). An engineered diffuser (PRC Photonics) provides a flat-top beam profile with 5%–10% uniformity within a 1.24 mm optical beam diameter at the sample cell surface (see Fig. 1(b)). The photoacoustically generated ultrasonic signal is ...
... a motor placed on top of the sample holder (not shown in Fig. 1(a)). An engineered diffuser (PRC Photonics) provides a flat-top beam profile with 5%–10% uniformity within a 1.24 mm optical beam diameter at the sample cell surface (see Fig. 1(b)). The photoacoustically generated ultrasonic signal is ...
Deep subwavelength nanolithography using localized surface plasmon modes on
... field, people soon realized the high optical resolution can be practically obtained at the near field. By collecting the evanescent waves at the near field, several near-field optical lithographies2 have been developed with the resolution beyond the diffraction limit while using near-UV or visible w ...
... field, people soon realized the high optical resolution can be practically obtained at the near field. By collecting the evanescent waves at the near field, several near-field optical lithographies2 have been developed with the resolution beyond the diffraction limit while using near-UV or visible w ...
PDF
... By plotting the therm-optic coefficient (γ) vs. the inverse color ν-number [9], we can visually identify two materials that can be used to develop an achrothermic system, this method not only helps identify two available optical materials, but also helps identify the CTE of the housing material requ ...
... By plotting the therm-optic coefficient (γ) vs. the inverse color ν-number [9], we can visually identify two materials that can be used to develop an achrothermic system, this method not only helps identify two available optical materials, but also helps identify the CTE of the housing material requ ...
Far-field measurement of ultra-small plasmonic mode volume Shuang Zhang, Yong-Shik Park,
... Plasmonics offer the optical interfacing between free space radiation and the nano world [1,2]. Among various plasmonic designs, optical nano-antennas are of special interest since they are capable of focusing light into a small gap region with nanometer scales in all three dimensions, and can be ta ...
... Plasmonics offer the optical interfacing between free space radiation and the nano world [1,2]. Among various plasmonic designs, optical nano-antennas are of special interest since they are capable of focusing light into a small gap region with nanometer scales in all three dimensions, and can be ta ...
Evaluating diffusion of light in the eye by objective means.
... we estimate that up to half a diopter of defocus can be absorbed. The pupil diameter of both the incoming and exiting beams is under the control of the experimenter. The adjustment of these parameters is a problem that this method shares with many objective procedures involving the optics of a patie ...
... we estimate that up to half a diopter of defocus can be absorbed. The pupil diameter of both the incoming and exiting beams is under the control of the experimenter. The adjustment of these parameters is a problem that this method shares with many objective procedures involving the optics of a patie ...
virtual retinal display
... operation and its advantages compared to other display technologies. The second part is dedicated to VRD ocular designs for HMD applications and the MTF performance of different ocular designs. In the last part, we give formulas that are used compute the MTF contributions of electronics, modulators, ...
... operation and its advantages compared to other display technologies. The second part is dedicated to VRD ocular designs for HMD applications and the MTF performance of different ocular designs. In the last part, we give formulas that are used compute the MTF contributions of electronics, modulators, ...
Far-field measurement of ultra-small plasmonic mode volume Shuang Zhang, Yong-Shik Park,
... Plasmonics offer the optical interfacing between free space radiation and the nano world [1,2]. Among various plasmonic designs, optical nano-antennas are of special interest since they are capable of focusing light into a small gap region with nanometer scales in all three dimensions, and can be ta ...
... Plasmonics offer the optical interfacing between free space radiation and the nano world [1,2]. Among various plasmonic designs, optical nano-antennas are of special interest since they are capable of focusing light into a small gap region with nanometer scales in all three dimensions, and can be ta ...
Electrostatic micromirrors for subaperturing in an
... 2. The lenslet array As background information, we first describe one traditional, non-electrostatic device used for wavefront sensing. The lenslet array is a collection of tiny lenses of diameter 1 mm or smaller. Each lenslet intercepts one sector of the incoming wavefront and projects a focused spo ...
... 2. The lenslet array As background information, we first describe one traditional, non-electrostatic device used for wavefront sensing. The lenslet array is a collection of tiny lenses of diameter 1 mm or smaller. Each lenslet intercepts one sector of the incoming wavefront and projects a focused spo ...
chapter35
... with larger index of refraction to a medium with smaller n, as in the diagram n1 > n2. The refracted angle is larger than the incident angle. As the incident angle increases to the point that the refracted angle is 90o, this incident angle is called the critical angle θc. Beyond it, there is no refr ...
... with larger index of refraction to a medium with smaller n, as in the diagram n1 > n2. The refracted angle is larger than the incident angle. As the incident angle increases to the point that the refracted angle is 90o, this incident angle is called the critical angle θc. Beyond it, there is no refr ...
Fourier transform infrared spectroscopy of aqueous solutions using
... In standard FT-JR instruments, the measured signal has a large dynamic range caused by the broad spectrum of the source and the basic working principle of the instrument (which is the measurement of intensity as a function of pathlength difference in the two arms of a Michelson interferometer) . As ...
... In standard FT-JR instruments, the measured signal has a large dynamic range caused by the broad spectrum of the source and the basic working principle of the instrument (which is the measurement of intensity as a function of pathlength difference in the two arms of a Michelson interferometer) . As ...
White-light Fourier transformer with low chromatic aberration
... but temporally incoherent illumination-are becoming more frequently used. Partially coherent systems are characterized by their multichannel nature. Thus they are suitable for processing information in a parallel way, and consequently for improving the signal-to-noise ratio.1 2 The treatment of a sy ...
... but temporally incoherent illumination-are becoming more frequently used. Partially coherent systems are characterized by their multichannel nature. Thus they are suitable for processing information in a parallel way, and consequently for improving the signal-to-noise ratio.1 2 The treatment of a sy ...
An Introduction to Ultraviolet/Visible Molecular Absorption
... A spectrophotometric measurement entails three steps: A 0% T adjustment A 100% T adjustment A measurement of % T with the sample in the radiation path The noise associated with each of these steps combines to give a net uncertainty for the final value obtained for T. The relationship between t ...
... A spectrophotometric measurement entails three steps: A 0% T adjustment A 100% T adjustment A measurement of % T with the sample in the radiation path The noise associated with each of these steps combines to give a net uncertainty for the final value obtained for T. The relationship between t ...
Flat optics with designer metasurfaces
... Conventional optical components such as lenses, waveplates and holograms rely on light propagation over distances much larger than the wavelength to shape wavefronts. In this way substantial changes of the amplitude, phase or polarization of light waves are gradually accumulated along the optical pa ...
... Conventional optical components such as lenses, waveplates and holograms rely on light propagation over distances much larger than the wavelength to shape wavefronts. In this way substantial changes of the amplitude, phase or polarization of light waves are gradually accumulated along the optical pa ...
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.