Sample pages 1 PDF
... Gas discharge tube, fluorescent lamp, light emitting diode (LED), source of coherent light (laser) ...
... Gas discharge tube, fluorescent lamp, light emitting diode (LED), source of coherent light (laser) ...
Digital Radiographic Image Acquisition and Processing
... Interaction stimulates, or gives energy to, electrons in the crystals. Crystals enter into the conductive layer, where they are trapped in an area of the crystal known as the color or phosphor center. ...
... Interaction stimulates, or gives energy to, electrons in the crystals. Crystals enter into the conductive layer, where they are trapped in an area of the crystal known as the color or phosphor center. ...
Document
... Because of the close proximity of the photo cathode and the entrance side of the MCP, only relatively small change in photo cathode voltage is required to prevent the emitted photoelectrons from entering the MCP. This characteristic, together with the high conductivity of the photo cathode, allows t ...
... Because of the close proximity of the photo cathode and the entrance side of the MCP, only relatively small change in photo cathode voltage is required to prevent the emitted photoelectrons from entering the MCP. This characteristic, together with the high conductivity of the photo cathode, allows t ...
UV LEDs ramp up the quiet side of the LED market
... The UV LED Curing Association (www. LED-UV Association (www.leduv.org), was uvledcuring.org) has been formed recently formed in September 2011 in Japan to orgaby curing manufacturers Phoseon Technol- nize makers of UV-LED printers, UV-LED ogy, Integration Technology Limited and manufacturers and ink ...
... The UV LED Curing Association (www. LED-UV Association (www.leduv.org), was uvledcuring.org) has been formed recently formed in September 2011 in Japan to orgaby curing manufacturers Phoseon Technol- nize makers of UV-LED printers, UV-LED ogy, Integration Technology Limited and manufacturers and ink ...
Physical basis of colors seen in Congo red-stained amyloid
... field appears bright, and the observer cannot detect that the light is polarized, even if the polarizing filter is rotated. If the other polarizing filter is also inserted, and one of them is rotated, the field now changes from light to dark, with maximal darkness when the planes of polarization of ...
... field appears bright, and the observer cannot detect that the light is polarized, even if the polarizing filter is rotated. If the other polarizing filter is also inserted, and one of them is rotated, the field now changes from light to dark, with maximal darkness when the planes of polarization of ...
Resonant-Cavity Light-Emitting Diodes: a review
... shortly reviewed using a classical approach valid in the so called weak-coupling regime. The total emission enhancement or Purcell factor, although small in planar cavities, will be explained. The design of a GaAs/AlGaAs RCLED is discussed. We review the state-of-the-art devices in different semicon ...
... shortly reviewed using a classical approach valid in the so called weak-coupling regime. The total emission enhancement or Purcell factor, although small in planar cavities, will be explained. The design of a GaAs/AlGaAs RCLED is discussed. We review the state-of-the-art devices in different semicon ...
Structural color production by constructive reflection from ordered
... Furthermore, Tyndall scattering structures would produce only a blue to violet color and would require an additional pigment to produce the green observed in the caruncles of living Philepitta castanea (e.g., Fox, '76).No pigment cells, however, occur in the core of the papillae where the color is p ...
... Furthermore, Tyndall scattering structures would produce only a blue to violet color and would require an additional pigment to produce the green observed in the caruncles of living Philepitta castanea (e.g., Fox, '76).No pigment cells, however, occur in the core of the papillae where the color is p ...
Lab X2
... “Chlorophyll is a chlorin pigment, which is structurally similar to and produced through the same metabolic pathway as other porphyrin pigments such as heme. At the center of the chlorin ring is a magnesium ion. This was discovered in 1906, and was the first time that magnesium had been detected in ...
... “Chlorophyll is a chlorin pigment, which is structurally similar to and produced through the same metabolic pathway as other porphyrin pigments such as heme. At the center of the chlorin ring is a magnesium ion. This was discovered in 1906, and was the first time that magnesium had been detected in ...
Atmospheric Optics 1
... The extinction coefficient therefore equals the absorption coefficient plus the scattering coefficient: ...
... The extinction coefficient therefore equals the absorption coefficient plus the scattering coefficient: ...
Light-emitting diode
... (corresponding to the energy of the photon) is determined by the energy gap of the semiconductor. An LED is usually small in area (less than 1 mm2), and integrated optical components are used to shape its radiation pattern and assist in reflection.[3] LEDs present many advantages over incandescent l ...
... (corresponding to the energy of the photon) is determined by the energy gap of the semiconductor. An LED is usually small in area (less than 1 mm2), and integrated optical components are used to shape its radiation pattern and assist in reflection.[3] LEDs present many advantages over incandescent l ...
Luminescence properties of a Fibonacci photonic
... resolved reflectivity measurements were carried out using a fiber coupled Tungsten-Halogen lamp as the white light excitation source. Light from the excitation source was focused to spot size of approximately 1mm in diameter, thus averaging out spatial inhomogeneities arising from spin coating. The ...
... resolved reflectivity measurements were carried out using a fiber coupled Tungsten-Halogen lamp as the white light excitation source. Light from the excitation source was focused to spot size of approximately 1mm in diameter, thus averaging out spatial inhomogeneities arising from spin coating. The ...
A new spectrally sharpened sensor basis to
... function which can be used by the brain with its three broad-band sensors. They calculate this biological reflectance function for a wide variety of surfaces and discover that certain surfaces have the mathematical property of being “singular”. What this means is that these surfaces take incoming li ...
... function which can be used by the brain with its three broad-band sensors. They calculate this biological reflectance function for a wide variety of surfaces and discover that certain surfaces have the mathematical property of being “singular”. What this means is that these surfaces take incoming li ...
Elimination of total internal reflection in GaInN light
... enhancing light extraction and, hence, is widely used in highpower commercial LEDs.4,5 However, KOH-based wetchemical etching needs additional process steps such as deposition and removal of a protection layer covering the Ohmic contact to n-type GaN. In addition, due to crystalplane-dependent etchi ...
... enhancing light extraction and, hence, is widely used in highpower commercial LEDs.4,5 However, KOH-based wetchemical etching needs additional process steps such as deposition and removal of a protection layer covering the Ohmic contact to n-type GaN. In addition, due to crystalplane-dependent etchi ...
4.3-1.1-10 Applications
... Blue LEDs are based on the wide band gap semiconductors GaN (gallium nitride) and InGaN (indium gallium nitride). They can be added to existing red and green LEDs to produce the impression of white light, though white LEDs today rarely use this principle. The first blue LEDs were made in 1971 by Jac ...
... Blue LEDs are based on the wide band gap semiconductors GaN (gallium nitride) and InGaN (indium gallium nitride). They can be added to existing red and green LEDs to produce the impression of white light, though white LEDs today rarely use this principle. The first blue LEDs were made in 1971 by Jac ...
Optical Materials for LWIR Applications
... tend to be much more expensive and fragile than available visible spectrum materials. Even though there are relatively few materials available, there are some advantages to designing LWIR optical systems. Most materials have higher refractive indices than visible glasses, so fewer elements are neede ...
... tend to be much more expensive and fragile than available visible spectrum materials. Even though there are relatively few materials available, there are some advantages to designing LWIR optical systems. Most materials have higher refractive indices than visible glasses, so fewer elements are neede ...
Enhancing the emission directionality of organic light-emitting diodes by using
... of 275 nm, 290 nm, 305 nm, and 335 nm were transferred reliably from the silicon master to the emissive layer with a groove depth of over 40 nm. After the SAMIM process, the samples were transferred into a vacuum evaporation system where an electron-transport layer of 60 nm-thick 1,3,5tris(2-N-pheny ...
... of 275 nm, 290 nm, 305 nm, and 335 nm were transferred reliably from the silicon master to the emissive layer with a groove depth of over 40 nm. After the SAMIM process, the samples were transferred into a vacuum evaporation system where an electron-transport layer of 60 nm-thick 1,3,5tris(2-N-pheny ...
Influence of Green, Red and Blue Light Emitting Diodes on
... The structure and physiology of plants are particularly regulated by light signals from the environment [4,20], as the primary response of plants during photosynthesis completely depends on light conditions. Plant growth and productivity depends on the light conditions [21] and photosynthetic metabo ...
... The structure and physiology of plants are particularly regulated by light signals from the environment [4,20], as the primary response of plants during photosynthesis completely depends on light conditions. Plant growth and productivity depends on the light conditions [21] and photosynthetic metabo ...
Parameters of ZnS/Metal/ZnS nanostructured systems with different
... *Corresponding Author Email: [email protected] ...
... *Corresponding Author Email: [email protected] ...
Materials and Components for Flat Panel Display
... MLAs directly above a liquid-crystal backlight unit the optical path from the light source can be controlled, and by incorporating MLAs in the valve of a liquidcrystal projector, the light usage efficiency can be markedly improved by exploiting the focusing action of the lenses. Applying MLAs to sem ...
... MLAs directly above a liquid-crystal backlight unit the optical path from the light source can be controlled, and by incorporating MLAs in the valve of a liquidcrystal projector, the light usage efficiency can be markedly improved by exploiting the focusing action of the lenses. Applying MLAs to sem ...
Influence of Tj on chromaticity and CRI of trichromatic white
... maximum output power, reliability, and lifetime, etc. Different techniques, such as micro-Raman spectroscopy, electroluminescence, photoluminescence, thermal resistance, and threshold voltage, have been used to determine the junction temperature.12–14 In this article, the junction temperature of red ...
... maximum output power, reliability, and lifetime, etc. Different techniques, such as micro-Raman spectroscopy, electroluminescence, photoluminescence, thermal resistance, and threshold voltage, have been used to determine the junction temperature.12–14 In this article, the junction temperature of red ...
what is color?
... Warm colors range from red to yellow, essentially the half of the color wheel corresponding to the longer wavelengths. Warm colors are active, attention-grabbing and aggressive. They stimulate the emotions, motivate and seem to come forward off the screen or page. Complementary colors lie opposite ...
... Warm colors range from red to yellow, essentially the half of the color wheel corresponding to the longer wavelengths. Warm colors are active, attention-grabbing and aggressive. They stimulate the emotions, motivate and seem to come forward off the screen or page. Complementary colors lie opposite ...
Light Quality
... When we 'see' an object, we are actually 'seeing' what colors that object is tranmitting or reflecting. For instance when we hold a red piece of transparent plastic up to sunlight, the plastic appears red to us because it is filtering all other Light Color colors of light out except red. Similarly, ...
... When we 'see' an object, we are actually 'seeing' what colors that object is tranmitting or reflecting. For instance when we hold a red piece of transparent plastic up to sunlight, the plastic appears red to us because it is filtering all other Light Color colors of light out except red. Similarly, ...
LED: Light Emitting Diodes FACTS GUIDE
... Because LEDs are cool to the touch, they are great for under cabinet, closets, and hall/ step lights. Outdoor is an ideal place for LED, both decorative and landscape lighting benefit using LED. 1. For it’s efficiency—many of us leave outdoor lights on for hours. 2. For it’s instant-on—compact flu ...
... Because LEDs are cool to the touch, they are great for under cabinet, closets, and hall/ step lights. Outdoor is an ideal place for LED, both decorative and landscape lighting benefit using LED. 1. For it’s efficiency—many of us leave outdoor lights on for hours. 2. For it’s instant-on—compact flu ...
Color Part 1
... be taken – Bright colors may end up less bright than other colors in the scene – The answer is to scale ALL colors in the scene which can be expensive ...
... be taken – Bright colors may end up less bright than other colors in the scene – The answer is to scale ALL colors in the scene which can be expensive ...
White top-emitting organic light-emitting diodes using one
... aluminium (Alq3), the OLED devices have been actively investigated as one of the next generation flat panel display devices owing to the advantages such as low driving voltage, high emission efficiency, self-emission, etc. [1]. In addition, these days, white organic light-emitting diodes (WOLED) are ...
... aluminium (Alq3), the OLED devices have been actively investigated as one of the next generation flat panel display devices owing to the advantages such as low driving voltage, high emission efficiency, self-emission, etc. [1]. In addition, these days, white organic light-emitting diodes (WOLED) are ...
Phosphor
A phosphor, most generally, is a substance that exhibits the phenomenon of luminescence. Somewhat confusingly, this includes both phosphorescent materials, which show a slow decay in brightness (> 1 ms), and fluorescent materials, where the emission decay takes place over tens of nanoseconds. Phosphorescent materials are known for their use in radar screens and glow-in-the-dark toys, whereas fluorescent materials are common in cathode ray tube (CRT) and plasma video display screens, sensors, and white LEDs.Phosphors are often transition metal compounds or rare earth compounds of various types. The most common uses of phosphors are in CRT displays and fluorescent lights. CRT phosphors were standardized beginning around World War II and designated by the letter ""P"" followed by a number.Phosphorus, the chemical element named for its light-emitting behavior, emits light due to chemiluminescence, not phosphorescence;