(NLPIP) - Full Spectrum Light Sources
... radiation. This is peculiar, since in general, UV radiation should be avoided. UV radiation fades and deteriorates architectural materials and works of art. Even though full-spectrum lamps might improve the color appearance of artwork, museums specifically require all radiation shorter than 400 nm t ...
... radiation. This is peculiar, since in general, UV radiation should be avoided. UV radiation fades and deteriorates architectural materials and works of art. Even though full-spectrum lamps might improve the color appearance of artwork, museums specifically require all radiation shorter than 400 nm t ...
Metal surface structuring with spatiotemporally focused femtosecond
... The results given above show that the STF scheme can help improve the quality for metal surface structuring particularly under high peak laser intensities, a condition frequently required for highthroughput surface structuring. One of the physical reasons behind this is shown in Fig. 2. One can real ...
... The results given above show that the STF scheme can help improve the quality for metal surface structuring particularly under high peak laser intensities, a condition frequently required for highthroughput surface structuring. One of the physical reasons behind this is shown in Fig. 2. One can real ...
Optical microscope - Frank`s Hospital Workshop
... lenses, typically made of glass, to collect light from the sample. At the lower end of the microscope tube one or more objective lenses are screwed into a circular nose piece which may be rotated to select the required objective lens. Typical magnification values of objective lenses are 4x, 5x, 10x, ...
... lenses, typically made of glass, to collect light from the sample. At the lower end of the microscope tube one or more objective lenses are screwed into a circular nose piece which may be rotated to select the required objective lens. Typical magnification values of objective lenses are 4x, 5x, 10x, ...
Part I : Theory of two
... – In reduced undoped LN after illumination with light of wavelength < 600nm at T<80K, the same ESR was found. • Before illumination, peak at approximate 2.5ev(500nm) due to bipolarons • After illumination, 1.6ev (760nm) attributed to small polarons • The reduced crystal is diamagnetic and no ESR sig ...
... – In reduced undoped LN after illumination with light of wavelength < 600nm at T<80K, the same ESR was found. • Before illumination, peak at approximate 2.5ev(500nm) due to bipolarons • After illumination, 1.6ev (760nm) attributed to small polarons • The reduced crystal is diamagnetic and no ESR sig ...
... have fundamental implications in our understanding of nanoscale phenomena. One of the main problems nano-optics is aiming to tackle, therefore, is how and how well we can dynamically control the spatial distribution of light on such a length scale. Unfortunately, a fundamental limit of physics – the ...
Radar Scattering from a Self-Aff ine Fractal Surface: Near
... of scattering mechanism. We do not make the tangent plane assumption in our model and therefore will refer to all scattering models at this geometry as "near-nadir." The most intuitive of the near-nadir models utilizes a geometric optics approach. The surface is treated as a collection of facets, la ...
... of scattering mechanism. We do not make the tangent plane assumption in our model and therefore will refer to all scattering models at this geometry as "near-nadir." The most intuitive of the near-nadir models utilizes a geometric optics approach. The surface is treated as a collection of facets, la ...
Technical Digest Post-Deadline Papers
... We used the general grating equation to show that the light diffracted by on-axis grating into the higher orders other than the 0-order cannot return to the focusing lens; if the pitch of the grating is shorten, this light may go beside the lens. The maximum pitches of the gratings in the air and a ...
... We used the general grating equation to show that the light diffracted by on-axis grating into the higher orders other than the 0-order cannot return to the focusing lens; if the pitch of the grating is shorten, this light may go beside the lens. The maximum pitches of the gratings in the air and a ...
Asphere Metrology
... Custom null optics, a computer generated hologram (CGH) or spherical null lenses, can be aligned externally with the interferometers to measure an asphere defined by an even order polynomial. A collimated beam passes through the transmission sphere and then a converging or diverging wavefront is dif ...
... Custom null optics, a computer generated hologram (CGH) or spherical null lenses, can be aligned externally with the interferometers to measure an asphere defined by an even order polynomial. A collimated beam passes through the transmission sphere and then a converging or diverging wavefront is dif ...
Excitation of a one-dimensional evanescent wave by conical edge
... imated by a gold strip of 10 μ m width and 60 nm tall. We assume in this condition that the characteristics of the SPP in this single strip is not different with a SPP on an extended gold film (identical wavevector and propagation length) [7]. The method separates the homogeneous areas (semi-infini ...
... imated by a gold strip of 10 μ m width and 60 nm tall. We assume in this condition that the characteristics of the SPP in this single strip is not different with a SPP on an extended gold film (identical wavevector and propagation length) [7]. The method separates the homogeneous areas (semi-infini ...
Unit 1.7 Optical networking and processing
... All incoming wavelengths pass through the IC from port 1 to 2. At the IFG pass-through wavelengths continue toward the OC. The tuning of the IFG selects drop wavelengths that are reflected back to the IC to port 2 and are passed to port 3 to be demultiplexed. Add wavelengths are sent to port 3 of th ...
... All incoming wavelengths pass through the IC from port 1 to 2. At the IFG pass-through wavelengths continue toward the OC. The tuning of the IFG selects drop wavelengths that are reflected back to the IC to port 2 and are passed to port 3 to be demultiplexed. Add wavelengths are sent to port 3 of th ...
- ePrints Soton
... finite thickness which varies in one dimension. Grating consists of periodic layers which exhibit strong resonance effect that results in leaky waveguide modes. The incident light is reflected or transmitted into one of several diffraction orders, which depends on the angle of incidence, and grating ...
... finite thickness which varies in one dimension. Grating consists of periodic layers which exhibit strong resonance effect that results in leaky waveguide modes. The incident light is reflected or transmitted into one of several diffraction orders, which depends on the angle of incidence, and grating ...
Dispersion Compensating Fiber Module
... splice loss, and b is reflection loss at the end of connectors which is estimated around 0.3 dB. There are differences of electromagnetic field distribution between SSMF and SC-DCF. SSMF has Gaussian electromagnetic field distribution and mode field diameter (MFD) of around 10 μm. On the other hand, ...
... splice loss, and b is reflection loss at the end of connectors which is estimated around 0.3 dB. There are differences of electromagnetic field distribution between SSMF and SC-DCF. SSMF has Gaussian electromagnetic field distribution and mode field diameter (MFD) of around 10 μm. On the other hand, ...
Concepts of optical signal processing and optical communications
... Until recently, virtually all communications systems have relied on the transmission of information by radio-frequency (rf) and microwave signals over electric cables or on rf and microwave electromagnetic radiation propagating in free space. This is remarkable because light appears a more natural c ...
... Until recently, virtually all communications systems have relied on the transmission of information by radio-frequency (rf) and microwave signals over electric cables or on rf and microwave electromagnetic radiation propagating in free space. This is remarkable because light appears a more natural c ...
Atomic Spectroscopy
... absorb the energy and become excited. The permitted energy levels are finite and well defined, but an electron may be made to change to another level if the atom absorbs energy equal to the difference between the two levels. When this occurs, the electron moves to a higher energy level, such as E1. ...
... absorb the energy and become excited. The permitted energy levels are finite and well defined, but an electron may be made to change to another level if the atom absorbs energy equal to the difference between the two levels. When this occurs, the electron moves to a higher energy level, such as E1. ...
Deep Horizontal Atmospheric Turbulence Modeling and Simulation with a Liquid
... We investigate the performance of a Liquid Crystal (LC) Spatial Light Modulator (SLM) as an optical device for generating high intensity atmospheric turbulence in the laboratory. The experimental setup represents long range horizontal beam propagation at a low altitude where the conditions of atmosp ...
... We investigate the performance of a Liquid Crystal (LC) Spatial Light Modulator (SLM) as an optical device for generating high intensity atmospheric turbulence in the laboratory. The experimental setup represents long range horizontal beam propagation at a low altitude where the conditions of atmosp ...
Galileoscope Optics Guide - Teaching with Telescopes
... image of a distant object. By placing the velum screen in varying locations, students will determine the function of each lens in a basic refracting telescope. Build a Galileoscope: 20-30 minutes The students in groups of two or three will build the refracting telescope from the kit. They will then ...
... image of a distant object. By placing the velum screen in varying locations, students will determine the function of each lens in a basic refracting telescope. Build a Galileoscope: 20-30 minutes The students in groups of two or three will build the refracting telescope from the kit. They will then ...
Optical Fabrication - University of Arizona
... Most optical fabrication processes begin with the extremely important consideration of holding onto the part during subsequent fabrication steps. Numerous factors must be considered when choosing the support method: part size, thickness, shape, expansion coefficient, and the direction and magnitude ...
... Most optical fabrication processes begin with the extremely important consideration of holding onto the part during subsequent fabrication steps. Numerous factors must be considered when choosing the support method: part size, thickness, shape, expansion coefficient, and the direction and magnitude ...
Two types of single-beam deflection and asymmetric transmission in
... We study single-beam deflection and asymmetry in transmission, two aspects of the same phenomenon that appear in the topologically simple, nonsymmetric, photonic crystal (PhC)-based structures without corrugations at the interfaces. Strong diffractions enabling efficient blazing, i.e., redistributio ...
... We study single-beam deflection and asymmetry in transmission, two aspects of the same phenomenon that appear in the topologically simple, nonsymmetric, photonic crystal (PhC)-based structures without corrugations at the interfaces. Strong diffractions enabling efficient blazing, i.e., redistributio ...
Microscopes - Photonics Research Group
... condenser, could be off-centered to achieve oblique illumination. Much of the early use of the light microscope depended on the relatively high image contrast that could be generated by differential absorption, reflection, birefringence, etc., due to specimen composition or structure. Specimens, suc ...
... condenser, could be off-centered to achieve oblique illumination. Much of the early use of the light microscope depended on the relatively high image contrast that could be generated by differential absorption, reflection, birefringence, etc., due to specimen composition or structure. Specimens, suc ...
Anti-reflective coating
An antireflective or anti-reflection (AR) coating is a type of optical coating applied to the surface of lenses and other optical elements to reduce reflection. In typical imaging systems, this improves the efficiency since less light is lost. In complex systems such as a telescope, the reduction in reflections also improves the contrast of the image by elimination of stray light. This is especially important in planetary astronomy. In other applications, the primary benefit is the elimination of the reflection itself, such as a coating on eyeglass lenses that makes the eyes of the wearer more visible to others, or a coating to reduce the glint from a covert viewer's binoculars or telescopic sight.Many coatings consist of transparent thin film structures with alternating layers of contrasting refractive index. Layer thicknesses are chosen to produce destructive interference in the beams reflected from the interfaces, and constructive interference in the corresponding transmitted beams. This makes the structure's performance change with wavelength and incident angle, so that color effects often appear at oblique angles. A wavelength range must be specified when designing or ordering such coatings, but good performance can often be achieved for a relatively wide range of frequencies: usually a choice of IR, visible, or UV is offered.