(等倾干涉) — equal thickness interference.
... A thin film with index of refraction n = 1.40 is placed in one arm of a Michelson interferometer, perpendicular to the optical path. If this causes a shift of 7.0 fringes of the pattern produced by light of = 589 nm, what is the film thickness? Solution: The change of optical path difference due ...
... A thin film with index of refraction n = 1.40 is placed in one arm of a Michelson interferometer, perpendicular to the optical path. If this causes a shift of 7.0 fringes of the pattern produced by light of = 589 nm, what is the film thickness? Solution: The change of optical path difference due ...
Magneto Optical Kerr Effect (MOKE)
... diameter and the sample-holder has 6 degree of freedom; this allows a reduction of the FIB patterned area extension, usually limited to 30÷50 μm2, and therefore in the required FIB operation time. ...
... diameter and the sample-holder has 6 degree of freedom; this allows a reduction of the FIB patterned area extension, usually limited to 30÷50 μm2, and therefore in the required FIB operation time. ...
Measurement of the 4Pi-confocal point spread function proves 75
... scanned in a plane containing the optical axis and the scattered light intensity was recorded as a function of the position. Scanning was performed by a scan stage that offered independently controlled x, y, and z axes (Photon Control, Cambridge, England). The bead was scanned 1.5 pm along the optic ...
... scanned in a plane containing the optical axis and the scattered light intensity was recorded as a function of the position. Scanning was performed by a scan stage that offered independently controlled x, y, and z axes (Photon Control, Cambridge, England). The bead was scanned 1.5 pm along the optic ...
Coherence - Studentportalen
... Transverse Coherence or Spatial Coherence or Coherence Width The phase order in the direction perpendicular to the beam is also important in many cases. The assumption in the previous section that we have a plane wave implicitly assumes perfect transverse coherence: the phase is the same everywhere ...
... Transverse Coherence or Spatial Coherence or Coherence Width The phase order in the direction perpendicular to the beam is also important in many cases. The assumption in the previous section that we have a plane wave implicitly assumes perfect transverse coherence: the phase is the same everywhere ...
Welcome to BME 495: Advanced Physical and Applied Optics
... wave equation, solutions of the wave equation, plane, spherical, and inhomogeneous waves, harmonic waves, monochromatic waves, wave groups, phase velocity, group velocity, polarization, Stokes parameters) – Lecture 2: Statistical Optics I (temporal coherence, spectral composition and coherence, inte ...
... wave equation, solutions of the wave equation, plane, spherical, and inhomogeneous waves, harmonic waves, monochromatic waves, wave groups, phase velocity, group velocity, polarization, Stokes parameters) – Lecture 2: Statistical Optics I (temporal coherence, spectral composition and coherence, inte ...
Practice Problems_sources
... (Hint: Consider a cube of volume Az where A is the area perpendicular to the light flow. The optical energy crossing the left facet of the cube over a time t would be present over the length z vt . Make use of the fact that intensity is power per unit area and energy density is energy per unit ...
... (Hint: Consider a cube of volume Az where A is the area perpendicular to the light flow. The optical energy crossing the left facet of the cube over a time t would be present over the length z vt . Make use of the fact that intensity is power per unit area and energy density is energy per unit ...
The long march of slow photonics
... these requirements are all fulfilled by a reconfigurable coupled resonator optical waveguide (CROW)2. In a CROW, the higher the storage efficiency ηs (how many bits are delayed by each resonator), the simpler is the reconfiguration. This allows a minimum number of resonators to control the delay. Th ...
... these requirements are all fulfilled by a reconfigurable coupled resonator optical waveguide (CROW)2. In a CROW, the higher the storage efficiency ηs (how many bits are delayed by each resonator), the simpler is the reconfiguration. This allows a minimum number of resonators to control the delay. Th ...
AOTF-based system for image cytometry
... A UV AOTF can be made with other crystals, such as KDP (KH2PO4), while a mid-IR AOTF can use crystals like Hg2Cl2 to operate up to 20 µm. The diffracted light intensity is directed into two physically separated first-order beams, denoted as the +1 and -1 beams. The angle between the beams is affecte ...
... A UV AOTF can be made with other crystals, such as KDP (KH2PO4), while a mid-IR AOTF can use crystals like Hg2Cl2 to operate up to 20 µm. The diffracted light intensity is directed into two physically separated first-order beams, denoted as the +1 and -1 beams. The angle between the beams is affecte ...
Looking through walls and around corners with
... typically 80ms. For imaging with incoherent illumination the integration times were 2-10s. The scattering samples used are a 10x20° Newport light shaping diffuser (Fig.2), and a white paper sticker with a thickness of 70±10µm (Fig.3). A white-light tungsten-halogen source (Schott KL1500LCD) was used ...
... typically 80ms. For imaging with incoherent illumination the integration times were 2-10s. The scattering samples used are a 10x20° Newport light shaping diffuser (Fig.2), and a white paper sticker with a thickness of 70±10µm (Fig.3). A white-light tungsten-halogen source (Schott KL1500LCD) was used ...
Photoacoustic microscopy with 2
... an order of magnitude worse than optically defined lateral resolution in the present 2-m PAM system. We can improve the axial resolution by using a higher-frequency ultrasonic transducer with a broader detection bandwidth, at the cost of penetration due to acoustic attenuation. Also, variation in t ...
... an order of magnitude worse than optically defined lateral resolution in the present 2-m PAM system. We can improve the axial resolution by using a higher-frequency ultrasonic transducer with a broader detection bandwidth, at the cost of penetration due to acoustic attenuation. Also, variation in t ...
Reflectivity measurements of a quantum well
... - halogen lamp – a source of broadband light - aperture – changes the convergent beam coming out of the halogen lamp into divergent imitating the point source and extracting the center of the light spot which has the biggest intensity being most homogeneous at the same time; its position coincides w ...
... - halogen lamp – a source of broadband light - aperture – changes the convergent beam coming out of the halogen lamp into divergent imitating the point source and extracting the center of the light spot which has the biggest intensity being most homogeneous at the same time; its position coincides w ...
resolution
... D larger than optical case, but wavelength much larger (cm's to m's), e.g. for wavelength = 1 cm, diameter = 100 m, resolution = 20". ...
... D larger than optical case, but wavelength much larger (cm's to m's), e.g. for wavelength = 1 cm, diameter = 100 m, resolution = 20". ...
pupil function - UCT Digital Image Processing
... and r is the radial distance measured from the optical axis in the image plane q r = xi2 + yi2 . The relevant imaging quantities are shown below, both for the case of a circular and a rectangular aperture: ...
... and r is the radial distance measured from the optical axis in the image plane q r = xi2 + yi2 . The relevant imaging quantities are shown below, both for the case of a circular and a rectangular aperture: ...
Laser Medicine and Medical Imaging – J. G. Fujimoto
... Dr. Xingde Li, Dr. Uwe Morgner, Dr. Joel Schuman, Dr. Debra L. Stamper, Professor James G. Fujimoto ...
... Dr. Xingde Li, Dr. Uwe Morgner, Dr. Joel Schuman, Dr. Debra L. Stamper, Professor James G. Fujimoto ...
PolarView™ ND filter
... increasing the risk of over exposure in bright ambient light. To ensure optimal image exposure over a wide range of lighting conditions, the well-equipped photographer often carries a number of ND filters, each with a specific fixed optical density. Changing the filters can be cumbersome and there i ...
... increasing the risk of over exposure in bright ambient light. To ensure optimal image exposure over a wide range of lighting conditions, the well-equipped photographer often carries a number of ND filters, each with a specific fixed optical density. Changing the filters can be cumbersome and there i ...
4.8 Acceptance Angle and Numerical Aperture
... The fibre output is a cone of light that spreads out wider as the distance from the fibre exit increases. The grid slide or screen and ruler can be used to measure diameters. The edges of the cone of light may appear fuzzy so there will be an error introduced into your measurements. Measurement of t ...
... The fibre output is a cone of light that spreads out wider as the distance from the fibre exit increases. The grid slide or screen and ruler can be used to measure diameters. The edges of the cone of light may appear fuzzy so there will be an error introduced into your measurements. Measurement of t ...
Lee, J - American Academy of Optometry
... IV. Diagnosis and Discussion BRAO Involves infarction secondary to acute ischemia of the inner retinal layers. The infarction may spontaneously resolve with time; with resolution, there is a normal appearing retina on clinical exam although inner retinal layers are permanently destroyed and mark ...
... IV. Diagnosis and Discussion BRAO Involves infarction secondary to acute ischemia of the inner retinal layers. The infarction may spontaneously resolve with time; with resolution, there is a normal appearing retina on clinical exam although inner retinal layers are permanently destroyed and mark ...
lecture 5 infrared spectrometry
... FOURIER TRANSFORM INFRARED SPECTROMETER A photodiode array can measure an entire spectrum at once. The spectrum is spread into its component wavelength and each wavelength is directed onto one detector element. ...
... FOURIER TRANSFORM INFRARED SPECTROMETER A photodiode array can measure an entire spectrum at once. The spectrum is spread into its component wavelength and each wavelength is directed onto one detector element. ...
Optical Considerations for IOLs
... Ascan do not actually measure axial length.They measure the time required for a sound pulse to travel through the ocular media , reflect from the retina , and return through the media.Sound moves faster through the crystalline lens than through the cornea , aqueous and vitreous.Even with in the len ...
... Ascan do not actually measure axial length.They measure the time required for a sound pulse to travel through the ocular media , reflect from the retina , and return through the media.Sound moves faster through the crystalline lens than through the cornea , aqueous and vitreous.Even with in the len ...
Microsoft Word Format - McMaster University > ECE
... Rate equations can be solved directly in time domain by numerical integration. However, under step function injection, some features in output optical power and lasing frequency varying as functions of time can be directly observed from steady state and small signal equations, such the turn-on delay ...
... Rate equations can be solved directly in time domain by numerical integration. However, under step function injection, some features in output optical power and lasing frequency varying as functions of time can be directly observed from steady state and small signal equations, such the turn-on delay ...
Synopsis by Shawn Miller
... relatively low cost drive system for precisely controlling the angle of an optical surface. There are several applications for which precise angular changes in an optical element are desired. For example controlling the angle of a mirror gives angular control of the optical path. Scanning of an opti ...
... relatively low cost drive system for precisely controlling the angle of an optical surface. There are several applications for which precise angular changes in an optical element are desired. For example controlling the angle of a mirror gives angular control of the optical path. Scanning of an opti ...
Optic Nerve Head and Retinal Nerve Fiber Layer Imaging in
... macular region. An 820-nanometer near-infrared light beam is used, and the reported depth resolution is less than or equal to 10 microns.16-20 It is a noncontact, noninvasive imaging technique that provides high-resolution cross-sectional images of the retina. The principle is similar to ultrasound ...
... macular region. An 820-nanometer near-infrared light beam is used, and the reported depth resolution is less than or equal to 10 microns.16-20 It is a noncontact, noninvasive imaging technique that provides high-resolution cross-sectional images of the retina. The principle is similar to ultrasound ...
INTERFERENCE
... Interference of waves occurs when waves overlap. There are two ways to produce an interference pattern for light: 1. Division of amplitude 2. Division of wavefront Both of these involve splitting the light from a single source into two beams. Division of amplitude This involves splitting a single l ...
... Interference of waves occurs when waves overlap. There are two ways to produce an interference pattern for light: 1. Division of amplitude 2. Division of wavefront Both of these involve splitting the light from a single source into two beams. Division of amplitude This involves splitting a single l ...
2-Day Intensive Training
... Stress analysis • The extension of the layers in the x-direction is chosen to minimize the horizontal stresses ...
... Stress analysis • The extension of the layers in the x-direction is chosen to minimize the horizontal stresses ...
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.