Design of a spherical focal surface using close
... realized from an array of flat sensors as illustrated in Fig. 1. The field covered by each set of micro-optics is relatively small, and thus the amount of curvature correction needed to image each subfield onto a flat focal plane is minimal. The process is similar to close-up imaging of flat objects ...
... realized from an array of flat sensors as illustrated in Fig. 1. The field covered by each set of micro-optics is relatively small, and thus the amount of curvature correction needed to image each subfield onto a flat focal plane is minimal. The process is similar to close-up imaging of flat objects ...
Holographic optics for a matched-filter optical
... Coherent optical processors have proven useful for a number of applications.' The unique properties of holographic optical elements offer a number of advantages over glass lenses for use in optical processors. Compared with conventional optics, holographic lenses ...
... Coherent optical processors have proven useful for a number of applications.' The unique properties of holographic optical elements offer a number of advantages over glass lenses for use in optical processors. Compared with conventional optics, holographic lenses ...
optical computer - 123SeminarsOnly.com
... Now a days we are using the electronic computer, just think for a while if all the electronic components are ...
... Now a days we are using the electronic computer, just think for a while if all the electronic components are ...
Non-destructive terahertz imaging of illicit drugs using spectral
... a vinyl plastic bag or a tablet, and not the type of the drug, providing insufficient grounds for opening the envelope for examination. Trace detection and canine detection, on the other hand, can only be effective if there are detectable signs outside the envelope, such as a scent or trace amounts ...
... a vinyl plastic bag or a tablet, and not the type of the drug, providing insufficient grounds for opening the envelope for examination. Trace detection and canine detection, on the other hand, can only be effective if there are detectable signs outside the envelope, such as a scent or trace amounts ...
View PDF - OMICS Group
... increasing the transmittance of light into the cell and minimizing the radiation losses from the bottom surface. The first generation of solar cell devices boasted a light to electricity conversion efficiency of about 6-9% and was made of amorphous silicon. Breakthrough research has led to solar cel ...
... increasing the transmittance of light into the cell and minimizing the radiation losses from the bottom surface. The first generation of solar cell devices boasted a light to electricity conversion efficiency of about 6-9% and was made of amorphous silicon. Breakthrough research has led to solar cel ...
Atmospheric Turbulence and its Influence on Adaptive Optics
... Tatarskii (1961) made the assumption that the variations in refractive index result directly in phase fluctuations described by φ(r), whereas any change in amplitude are due to second order effects acting on the already perturbed wavefront. This turns out to be a reasonable assumption as most models ...
... Tatarskii (1961) made the assumption that the variations in refractive index result directly in phase fluctuations described by φ(r), whereas any change in amplitude are due to second order effects acting on the already perturbed wavefront. This turns out to be a reasonable assumption as most models ...
A Simple Classroom Demonstration of Natural Convection
... requires a few hours of preparation time, but very little in materials cost, assuming an overhead projector is already available. It could be prepared by the instructor or by students as part of a class-related project. I explain below the principle behind the schlieren technique, the preparation re ...
... requires a few hours of preparation time, but very little in materials cost, assuming an overhead projector is already available. It could be prepared by the instructor or by students as part of a class-related project. I explain below the principle behind the schlieren technique, the preparation re ...
Stability characterization of an optical injection phase locked loop for
... smaller than the pilot tone frequency (1 GHz), we measured the locking range (by changing the slave laser freerunning frequency and observing when it gets (un)locked. For the fiber-to-fiber (F-t-F) injection ratio (IR, defined as the master power injected into the slave laser / slave output power) o ...
... smaller than the pilot tone frequency (1 GHz), we measured the locking range (by changing the slave laser freerunning frequency and observing when it gets (un)locked. For the fiber-to-fiber (F-t-F) injection ratio (IR, defined as the master power injected into the slave laser / slave output power) o ...
Whispering-gallery-mode microdisk lasers
... disk, undergoing mode selection, form WGMs and are not disturbed by the central pedestal portion. For optical pumping, a picosecond laser of wavelength 532 nm (frequency doubled from a 1064 nm laser), pulsewidth of 15 ps, and a repetition rate of 50 KHz was chosen. The laser beam is focused with a f ...
... disk, undergoing mode selection, form WGMs and are not disturbed by the central pedestal portion. For optical pumping, a picosecond laser of wavelength 532 nm (frequency doubled from a 1064 nm laser), pulsewidth of 15 ps, and a repetition rate of 50 KHz was chosen. The laser beam is focused with a f ...
PhotoAcoustic Schlieren Elastography II
... A strobing method was used in which waves are produced and detected at discrete time steps. Wavefront propagation is captured by changing the offset between the initial laser pulse and the image capture. High frequency triggering of the illumination source is attractive in its simplicity, but also r ...
... A strobing method was used in which waves are produced and detected at discrete time steps. Wavefront propagation is captured by changing the offset between the initial laser pulse and the image capture. High frequency triggering of the illumination source is attractive in its simplicity, but also r ...
Optimal wavelength for ultrahigh-resolution optical
... Superluminescent diodes (SLD) are often used for OCT imaging and typically have 10-15 µm longitudinal resolution [2] due to limited optical bandwidth. A Kerr-lens mode-locked Ti:sapphire laser, optimized for a short coherence length, can obtain longitudinal resolution of less than 2 µm [3]. Recent d ...
... Superluminescent diodes (SLD) are often used for OCT imaging and typically have 10-15 µm longitudinal resolution [2] due to limited optical bandwidth. A Kerr-lens mode-locked Ti:sapphire laser, optimized for a short coherence length, can obtain longitudinal resolution of less than 2 µm [3]. Recent d ...
Fourier domain optical coherence tomography with an
... Recently, Fourier domain optical coherence tomography (FDOCT) has attracted much attention due to the significantly improved sensitivity and imaging speed compared to time domain OCT. The large depth of focus is necessary to image a long-depth-range sample with constant transverse resolution in FDOC ...
... Recently, Fourier domain optical coherence tomography (FDOCT) has attracted much attention due to the significantly improved sensitivity and imaging speed compared to time domain OCT. The large depth of focus is necessary to image a long-depth-range sample with constant transverse resolution in FDOC ...
Depth of Field
... Depth of Field The distance range between the nearest and farthest objects that appear in acceptably sharp focus. Depth of field depends on the lens opening, the focal length of the lens, and the distance from the lens to the subject. ...
... Depth of Field The distance range between the nearest and farthest objects that appear in acceptably sharp focus. Depth of field depends on the lens opening, the focal length of the lens, and the distance from the lens to the subject. ...
Length poster
... (or vacuum wavelength), it is already possible to build lasers with an optical frequency that is known around ten thousand times more accurately. The iodinestabilised laser is limited because the iodine molecules are at room temperature and bang into each other, whizzing in and out of the laser beam ...
... (or vacuum wavelength), it is already possible to build lasers with an optical frequency that is known around ten thousand times more accurately. The iodinestabilised laser is limited because the iodine molecules are at room temperature and bang into each other, whizzing in and out of the laser beam ...
White-light Fourier transformer with low chromatic aberration
... Fourier transform systems have also been proposed. 7-9 These systems are composed of two zone plates and two nondispersive lenses. The latter devices permit the development of some applications in optical matched filtering and other optical processing techniques that use polychromatic illumination. ...
... Fourier transform systems have also been proposed. 7-9 These systems are composed of two zone plates and two nondispersive lenses. The latter devices permit the development of some applications in optical matched filtering and other optical processing techniques that use polychromatic illumination. ...
Slowing Down the Speed of Light - The Institute of Optics
... Motivation: Maximum Slow-Light Time Delay “Slow light”: group velocities < 10-6 c ! Proposed applications: controllable optical delay lines optical buffers, true time delay for synthetic aperture radar. Key figure of merit: normalized time delay = total time delay / input pulse duration ≈ informati ...
... Motivation: Maximum Slow-Light Time Delay “Slow light”: group velocities < 10-6 c ! Proposed applications: controllable optical delay lines optical buffers, true time delay for synthetic aperture radar. Key figure of merit: normalized time delay = total time delay / input pulse duration ≈ informati ...
Exam 3 Solutions
... In the first step we ignore the second mirror and find where the image of the first mirror forms. The equation gives i1 = 40 cm. We then compute the object distance to the second mirror as ...
... In the first step we ignore the second mirror and find where the image of the first mirror forms. The equation gives i1 = 40 cm. We then compute the object distance to the second mirror as ...
Slow Light - Duke Physics
... on the order of a pulse width, this is sufficient for telecommunication applications such as the optical retiming of an optical clock to data pulses. Another issue in these stimulated Brillouin scattering experiments is that the bandwidth over which slow light could be generated was limited to less ...
... on the order of a pulse width, this is sufficient for telecommunication applications such as the optical retiming of an optical clock to data pulses. Another issue in these stimulated Brillouin scattering experiments is that the bandwidth over which slow light could be generated was limited to less ...
Chapter 36
... A Fresnal lens is designed to take advantage of this fact. It produces a powerful lens without great thickness. ...
... A Fresnal lens is designed to take advantage of this fact. It produces a powerful lens without great thickness. ...
Intro_Ch_03B
... – Pen used to write data – Pen used as a pointer – Handwriting recognition – On screen keyboard ...
... – Pen used to write data – Pen used as a pointer – Handwriting recognition – On screen keyboard ...
Fourier Optics Laboratory Manual - McGill Undergraduate Physics Lab
... The first two terms of the last line are depend only on the intensity of the initial waves but the last one also depends on their respective phase; this constitutes the interference term. Given that the waves have the same wavelength λ and are in phase at the source, we can deduce the laws for const ...
... The first two terms of the last line are depend only on the intensity of the initial waves but the last one also depends on their respective phase; this constitutes the interference term. Given that the waves have the same wavelength λ and are in phase at the source, we can deduce the laws for const ...
Physics 221 – Lab 7 Spherical mirrors
... The parallel ray emerges from the object parallel to the principal axis. Where does it go after reflecting off of a concave mirror? ...
... The parallel ray emerges from the object parallel to the principal axis. Where does it go after reflecting off of a concave mirror? ...