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A Fast Optical Propagation Technique for Modeling
... electrical-mechanical) phase grating made from parallel rows of reflective ribbons. When all the ribbons are in the same plane, incident light that strikes normal to the surface reflects 180 degrees off the GLV. However, if alternating ribbons are moved down a quarter of a wavelength, a “square-well ...
... electrical-mechanical) phase grating made from parallel rows of reflective ribbons. When all the ribbons are in the same plane, incident light that strikes normal to the surface reflects 180 degrees off the GLV. However, if alternating ribbons are moved down a quarter of a wavelength, a “square-well ...
TRIPURA UNIVERSITY 2014
... Refraction at spherical surface, thin lenses and their combination. cardinal points. equivalent lens. Chromatic and spherical aberration, qualitative and quantitative study of their remedies with reference to the construction of Ramsden and Huygen's eyepiece. Lecture Period: 08 lnterference of light ...
... Refraction at spherical surface, thin lenses and their combination. cardinal points. equivalent lens. Chromatic and spherical aberration, qualitative and quantitative study of their remedies with reference to the construction of Ramsden and Huygen's eyepiece. Lecture Period: 08 lnterference of light ...
Athermal laser design
... intracavity filter should be used, as discussed below and shown in Fig. 4(b). Plotted in Fig. 5 is the trade-off of the athermal compensator waveguide length with the choice of compensator waveguide and grating design. Figure 4(c) shows that less than 1.5mm of compensator waveguide is required if a ...
... intracavity filter should be used, as discussed below and shown in Fig. 4(b). Plotted in Fig. 5 is the trade-off of the athermal compensator waveguide length with the choice of compensator waveguide and grating design. Figure 4(c) shows that less than 1.5mm of compensator waveguide is required if a ...
What is Light?
... While these thermal detectors have a very flat spectral responsivity, they suffer from temperature sensitivity, and usually must be artificially cooled. Another strategy employed by thermal detectors is to modulate incident light with a chopper. This allows the detector to measure differentially be ...
... While these thermal detectors have a very flat spectral responsivity, they suffer from temperature sensitivity, and usually must be artificially cooled. Another strategy employed by thermal detectors is to modulate incident light with a chopper. This allows the detector to measure differentially be ...
1 Organic Molecules and Decoherence Experiments in a Molecule
... oven is determined by the velocity spread in the source and it is only about 1.5 times larger than the de Broglie wavelength, which lies for all particles and velocities in the range of 2 . . . 5 × 10−12 m. Both the de Broglie wavelength and the coherence length are thus 500 . . . 1000 times smaller ...
... oven is determined by the velocity spread in the source and it is only about 1.5 times larger than the de Broglie wavelength, which lies for all particles and velocities in the range of 2 . . . 5 × 10−12 m. Both the de Broglie wavelength and the coherence length are thus 500 . . . 1000 times smaller ...
11.2 - Partial Refraction and Total Internal Reflection
... Sometimes when you look out a window, you see what is outside as well as your own reflection This is because some light reflects and some light refracts at a surface between two media that have different indices of refraction This phenomenon is called partial reflection and refraction ...
... Sometimes when you look out a window, you see what is outside as well as your own reflection This is because some light reflects and some light refracts at a surface between two media that have different indices of refraction This phenomenon is called partial reflection and refraction ...
Full Text - Journal of The Royal Society Interface
... gratings [6,8]. Diffraction gratings are periodical arrays of diffractive elements that periodically modulate the phase and/or amplitude of an incident light wave. In flowers, diffraction gratings consist of ordered striations or ridges that form on the epidermal cells. The formation of these striat ...
... gratings [6,8]. Diffraction gratings are periodical arrays of diffractive elements that periodically modulate the phase and/or amplitude of an incident light wave. In flowers, diffraction gratings consist of ordered striations or ridges that form on the epidermal cells. The formation of these striat ...
3 Introduction to Add
... coupler splits light launched into port 1 and a specific wavelength, λG, is reflected by the two identical gratings. These reflected signals interfere in the 3dB coupler in such a way that the signal is dropped and the back-reflected light intensity arriving at port1 is zero, providing the coupler i ...
... coupler splits light launched into port 1 and a specific wavelength, λG, is reflected by the two identical gratings. These reflected signals interfere in the 3dB coupler in such a way that the signal is dropped and the back-reflected light intensity arriving at port1 is zero, providing the coupler i ...
LEVEL –A QESTIONS-OPTICS 1. Draw a ray diagram to show the
... A convex lens is held in water what change, if any, do you expect in its focal length? A equiconvex lens of focal length 15cm is cut into two equal halves as shown in fig. What is the focal length of each half? Name the factors on which the angle of deviation produced by a prism depends. A lens imme ...
... A convex lens is held in water what change, if any, do you expect in its focal length? A equiconvex lens of focal length 15cm is cut into two equal halves as shown in fig. What is the focal length of each half? Name the factors on which the angle of deviation produced by a prism depends. A lens imme ...
Convex and Concave Mirrors Prac
... AIM: To observe and record how curved mirrors reflect light beams. This practical activity involves ray tracing. If, for example, a light ray appears like Figure 1, you will need to concave mirror 1. Trace the curve of the mirror. Figure 2 Figure 3 2. Place two small dots on the incident ray and two ...
... AIM: To observe and record how curved mirrors reflect light beams. This practical activity involves ray tracing. If, for example, a light ray appears like Figure 1, you will need to concave mirror 1. Trace the curve of the mirror. Figure 2 Figure 3 2. Place two small dots on the incident ray and two ...
Reflectivity of Nonlinear Apodized Chirped Fiber Bragg Grating Under Water
... of the reflectivity with the wavelength of the signal traveling in the chirped FBG in the linear and nonlinear cases for the Sine profile. The variations of the reflectivity have been calculated under the effect of the temperature range 10 - 25 o C. The increase that occurs in the values of the refl ...
... of the reflectivity with the wavelength of the signal traveling in the chirped FBG in the linear and nonlinear cases for the Sine profile. The variations of the reflectivity have been calculated under the effect of the temperature range 10 - 25 o C. The increase that occurs in the values of the refl ...
Atomic Spectra - Rutgers Physics
... In the most elementary picture the single electron of the hydrogen atom can exist only in certain quantized bound energy states, indicated by the quantum number n = 1,2,3, etc. It was N. Bohr's (his son Aage Bohr, was also a Nobel prize winner) great contribution to provide the first simple bound st ...
... In the most elementary picture the single electron of the hydrogen atom can exist only in certain quantized bound energy states, indicated by the quantum number n = 1,2,3, etc. It was N. Bohr's (his son Aage Bohr, was also a Nobel prize winner) great contribution to provide the first simple bound st ...
System for observing interference phenomenon: In the previous
... In the previous section, we have discussed about the interference phenomenon arising due to division of wave fronts and division of amplitudes. Various systems based on these principles have been designed and are used to observe this phenomenon. These systems find several applications in science and ...
... In the previous section, we have discussed about the interference phenomenon arising due to division of wave fronts and division of amplitudes. Various systems based on these principles have been designed and are used to observe this phenomenon. These systems find several applications in science and ...
Part 1
... possible for very sparse patterns. To resolve this problem, we have developed a simple dose modulation scheme utilizing the existing beam blanker. In this scheme, a much lower voltage is applied when modulating the beam during exposure. This allows a small fraction of the beam to leak through the cu ...
... possible for very sparse patterns. To resolve this problem, we have developed a simple dose modulation scheme utilizing the existing beam blanker. In this scheme, a much lower voltage is applied when modulating the beam during exposure. This allows a small fraction of the beam to leak through the cu ...
PDF only - at www.arxiv.org.
... the group velocity reduction below the speed of light in the case of certain Bessel beam pulses has been considered and an idea of its application for a natural optical buffer presented. However, the authors treat the problem as if only one type of Bessel pulse existed, no matter how it is gener ...
... the group velocity reduction below the speed of light in the case of certain Bessel beam pulses has been considered and an idea of its application for a natural optical buffer presented. However, the authors treat the problem as if only one type of Bessel pulse existed, no matter how it is gener ...
Intraocular Lenses
... plate is proportional to , so different colors focus at different distances from the zone plate. Ordinary refractive lenses have chromatic aberration as well, but much less pronounced than zone plates. For example: +10 D lens made of glass with an Abbe number of 30 (high dispersion) has CA ~ 0.3 D ...
... plate is proportional to , so different colors focus at different distances from the zone plate. Ordinary refractive lenses have chromatic aberration as well, but much less pronounced than zone plates. For example: +10 D lens made of glass with an Abbe number of 30 (high dispersion) has CA ~ 0.3 D ...
Interference3
... Of one of the interfering beams displaces the entire Fringe system through a distance ...
... Of one of the interfering beams displaces the entire Fringe system through a distance ...
tdlitho
... (exciplex) laser source with shorter wavelength emission – ArF – 193 nM – Shorter wavelength than so-called “deep UV” peak of 248nM – F2 Laser – Low output but at 157nM ...
... (exciplex) laser source with shorter wavelength emission – ArF – 193 nM – Shorter wavelength than so-called “deep UV” peak of 248nM – F2 Laser – Low output but at 157nM ...
LABORATORY MANUAL (Modern Physics & General Optics) PL – 402 (2013-2014)
... the “Measuring amplifier” with a BNC connector. Keep the photocell shutter closed all the time except while taking readings, of course. 3. For the universal measuring amplifier, select the following settings: (a) electrometer resistance Re > 1013 Ω, (b) amplification = 100 and (c) time constant =0. ...
... the “Measuring amplifier” with a BNC connector. Keep the photocell shutter closed all the time except while taking readings, of course. 3. For the universal measuring amplifier, select the following settings: (a) electrometer resistance Re > 1013 Ω, (b) amplification = 100 and (c) time constant =0. ...
Refractive index
... Refractive index is a dimensionless physical quantity, which is specific for a certain medium, and its value characterizes the speed of light in this medium. We distinguish between the relative and absolute refractive index. The absolute refractive index is defined as a ratio of the speed of light i ...
... Refractive index is a dimensionless physical quantity, which is specific for a certain medium, and its value characterizes the speed of light in this medium. We distinguish between the relative and absolute refractive index. The absolute refractive index is defined as a ratio of the speed of light i ...
In this lab you will use the phenomenon of interference... thickness of thin films. Two interference techniques, Michelson and... Thin Film Measurement 1 Introduction
... Two measuring techniques are used and compared with this set-up. The first involves using the micrometer on the mirror to measure the difference in zero path length between the thin film and no film. The second technique uses the step height change in the interference pattern much like the Fizeau te ...
... Two measuring techniques are used and compared with this set-up. The first involves using the micrometer on the mirror to measure the difference in zero path length between the thin film and no film. The second technique uses the step height change in the interference pattern much like the Fizeau te ...
Midterm2
... number m due to the insertion? Draw a picture and write an equation for m to get started. (5 marks) ...
... number m due to the insertion? Draw a picture and write an equation for m to get started. (5 marks) ...
LED Characteristic Measurement Methods
... the obtained spectral characteristics. Because the human eye sees colors as area mean values in the spectral distribution, it is possible to express spectral characteristics that match human perceptions. In recent years, it has become the norm for the color characteristics of visible light LEDs to b ...
... the obtained spectral characteristics. Because the human eye sees colors as area mean values in the spectral distribution, it is possible to express spectral characteristics that match human perceptions. In recent years, it has become the norm for the color characteristics of visible light LEDs to b ...
Total internal reflection holography for optical interconnections
... the needs of optical interconnections. They are efficient and can serve as focusing elements, imaging elements, beam deflectors, and fan-out elements. Almost any shape of structure can be realized. This flexibility allows complex and compact interconnections. Two different types of diffractive optic ...
... the needs of optical interconnections. They are efficient and can serve as focusing elements, imaging elements, beam deflectors, and fan-out elements. Almost any shape of structure can be realized. This flexibility allows complex and compact interconnections. Two different types of diffractive optic ...
Introduction to Spectroscopy
... Spectra are usually plotted as frequency vs. amplitude – Instead of energy, wavelength or energy (related properties) can also be used – The choice of x- and y-axes is often dependent on the particular technique, its history, etc… – Key parameter is frequency/energy/wavelength resolution ...
... Spectra are usually plotted as frequency vs. amplitude – Instead of energy, wavelength or energy (related properties) can also be used – The choice of x- and y-axes is often dependent on the particular technique, its history, etc… – Key parameter is frequency/energy/wavelength resolution ...
Diffraction grating
![](https://commons.wikimedia.org/wiki/Special:FilePath/Diffraction_grating.jpg?width=300)
In optics, a diffraction grating is an optical component with a periodic structure, which splits and diffracts light into several beams travelling in different directions. The emerging coloration is a form of structural coloration. The directions of these beams depend on the spacing of the grating and the wavelength of the light so that the grating acts as the dispersive element. Because of this, gratings are commonly used in monochromators and spectrometers.For practical applications, gratings generally have ridges or rulings on their surface rather than dark lines. Such gratings can be either transmissive or reflective. Gratings which modulate the phase rather than the amplitude of the incident light are also produced, frequently using holography.The principles of diffraction gratings were discovered by James Gregory, about a year after Newton's prism experiments, initially with items such as bird feathers. The first man-made diffraction grating was made around 1785 by Philadelphia inventor David Rittenhouse, who strung hairs between two finely threaded screws. This was similar to notable German physicist Joseph von Fraunhofer's wire diffraction grating in 1821.Diffraction can create ""rainbow"" colors when illuminated by a wide spectrum (e.g., continuous) light source. The sparkling effects from the closely spaced narrow tracks on optical storage disks such as CD's or DVDs are an example, while the similar rainbow effects caused by thin layers of oil (or gasoline, etc.) on water are not caused by a grating, but rather by interference effects in reflections from the closely spaced transmissive layers (see Examples, below). A grating has parallel lines, while a CD has a spiral of finely-spaced data tracks. Diffraction colors also appear when one looks at a bright point source through a translucent fine-pitch umbrella-fabric covering. Decorative patterned plastic films based on reflective grating patches are very inexpensive, and are commonplace.