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Global Lighting Technologies (GLT, Brecksville, Ohio) has introduced new LED-based high-brightness backlights that offer exceptional thinness—down to 0.4 mm or less—to provide the slimmest molded light guide BLUs available for backlighting LCDs in a wide array of consumer electronics products, as well as the keypads/keyboards used in mobile phones and laptop and desktop PCs. GLT's patented MicroLens™ light extraction technology and improved manufacturing processes are making light guide packages that are thinner than ever available to OEMs who need to meet the increasing consumer demand for smaller, slimmer size with no sacrifice in performance. Backlight assemblies less than 1 mm high utilizing light guides as thin as 0.4 mm or less are now a reality. The result is BLUs that offer the thinness of electroluminescent (EL) backlighting, but with all the advantages of today's advanced LEDs combined with the superior light extraction provided by MicroLens™ molded light guides. As LEDs have gotten brighter and thinner, so have GLT's molded light guide BLUs, thanks to continual refinements of the company's patented MicroLens light extraction technology. The result is light guides that are the world's most efficient edge-lit backlights, with thinner packages that can backlight LCDs from 0.25-inch up to 50-inch diagonal and higher. Light is extracted precisely where needed, such as around thru-holes for keypads. MicroLens can reduce the number of LEDs required, providing bright, uniform light in a thinner form factor with no hot spots or dark areas. The reduction in the number of LEDs needed also can mean less material required, resulting in lower manufacturing costs for OEMs. www.glthome.com
FP-HOM series line lasers from Laser Components (Hudson, N.H.) are available for the first time with a broadband light source. Through the use of a super luminescent diode (SLD) the speckle patterns common in laser light are significantly reduced, which allows more precise measurements in machine vision applications. The SLD emits at 680 nm, achieving an optical output power of approximately 3 mW after optics. All FP-HOM series FLEXPOINT® line lasers were revised. When focusing the line, its alignment remains constant. The focal range lies between 50 mm and infinity. The following fan angles are available: 10°, 30°, 45°, 60°, and 90°. Due to the new design, a higher output power of up to 70 mW can be achieved, depending on the wavelength. This results in shorter exposure time and thus a shorter processing time. Unlike lasers that use a cylindrical lens to generate a line, the power distribution of the FP-HOM series is homogenous. This leads to a uniform power density across the whole line. FLEXPOINT® line lasers are available on a standard basis in the green (532 nm) and red (635-660 nm) spectral ranges. Laser diodes of other wavelengths can be implemented upon request. A variety of options, such as digital or analog modulation and power adjustment using a potentiometer or a third wire, opens up a large field of potential applications. www.lasercomponents.com
Providing design engineers with a compact means to illuminate a given area with near-infrared light, TT electronics OPTEK Technology (Carrollton, Texas) has developed a series of light rings using LEDs with 850nm to 880nm wavelengths. Designated the OPA80 Series and OPA83 Series, the near-infrared wavelength light sources are available in a variety of ring sizes and configurations, and feature an optional ambient light-sensing device to minimize current consumption during high ambient light conditions. Additional applications for the near-infrared light rings include spot lighting, flash lighting and under-counter lighting. The near-infrared light ring series includes the OPA80 12V light ring with ambient light sensor; OPA81 12V light ring without sensor; OPA82 5V light ring with ambient light sensor; and OPA83 5V light ring without sensor. Available ring sizes include 0.625" ID/1.25" OD; 1.0" ID/1.75" OD; 1.25" ID/2.0" OD; and 1.5" ID/2.25" OD. LED quantities range from 10 to 24, depending on voltage rating and ring size. LED types include surface mount devices, with a viewing angle of 100°, as well as 3mm through-hole packages with viewing angles of 18°. The OPA80 and OPA83 Series light rings are available in either 850nm or 880nm center wavelengths. Typical forward voltage for each LED is 1.35VF. Reverse voltage per emitter is 2.0V, with a continuous forward current of 50mA and peak pulsed forward current of 1.0A at 1 percent duty cycle. Operating temperature ranges from -40°C to +85°C. Custom mounting, electrical, cabling and connectors are also available. The light rings are RoHS-compliant. www.optekinc.com
Opto Diode Corporation (Newbury Park, Calif.) introduces a photodiode preamplifier combination device that features higher gain in lower light environments, the new NIR / Red Enhanced 6mm˛ ODA-6W-500M Photodetector-Preamplifier. The low-light, high-sensitivity component has a large active area that operates in the NIR wavelength with response at 940 nm (typically 315 V/µW, min. 290). The standard 6mm˛ ODA-6W-500M offers 500 Mohm gain with custom gains also available, per customer specifications. Opto Diode's new component is based on their proprietary shielded amplifier electronics, featuring extremely low noise and high sensitivity in the red enhanced preamp combination detector. Smaller and more compact than discrete solutions, the hermetically-sealed TO-39 can is highly suitable for assembly in confined spaces. Ideal for applications such as fluorescence, microscopy and analytical chemistry, the detector is designed for easy integration into new and existing systems. Storage and operating temperature ranges from -25 degrees C to +100 degrees C. Units are available for shipping now in OEM quantities and priced at $44.80 each in quantities of 100 pieces. www.optodiode.com
OSRAM (Santa Clara, Calif.) has achieved record values of efficiency and lifetime while maintaining the brightness of warm white organic light emitting diodes (OLEDs). For the first time, laboratory researchers have demonstrated it is possible to improve two crucial OLED characteristics simultaneously: efficiency and lifetime. Up to now, higher efficiency meant shorter life. The color rendering index (CRI) of the almost 100 cm˛ prototype is 80. By March 2009, OSRAM researchers expect that a demonstrator for an energy-saving flat OLED light module comprising several tiles will be able to deliver an overall luminous flux of 500 lm from a power consumption of less than 10 W. With their diffused light—the color of which can be individually controlled—OLEDs will enhance premium lighting design elements such as light tiles that can be attached to any surface. For widespread applications it will be necessary to produce efficient OLEDs in large numbers at reasonably low cost - an essential objective of the OPAL research project. www.osram-os.com