Features

Green Laser Diode Modules

A line of green laser diode modules available from BEA Lasers (Elk Grove Village, IL) is suitable for spectroscopy, particle measurement, medical tissue analysis, interferometry, holography, robotic control, and flow visualization. The Model 2501 is a fixed-focus CW diode pumped laser diode module with a beam divergence of

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Vibration Isolation Workstation

Kinetic Systems (Boston, MA) offers the MK26 vibration isolation workstation for ultra-low natural frequency applications. It utilizes the Minus K® vertical isolator, which uses a stiff spring and a negative-stiffness mechanism to provide vertical stiffness without affecting the static load-supporting capability. Horizontal isolation is provided by beam columns connected in series with the vertical-motion isolator. Adjusted to a 1/2-Hz natural frequency, the workstation can achieve 93% isolation efficiency at 2 Hz, 99% at 5 Hz, and 99.7% at 10 Hz. The MK26 is available with a 650-pound gross load capacity. Optional equipment includes guard rails, non-isolated shelves, Faraday cages, and tabletop enclosures. Applications include analytical balances, cell injection, confocal microscopes, patch clamping, optical microscopes, wafer probing, sensor calibration, and atomic force microscopes.

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Diode Laser System

TOPTICA Photonics AG (Graefelfing, Germany) offers the TA 100 single-mode output diode laser and amplifier systems, which may serve as a replacement for dye- or frequency-doubled solidstate lasers. The red-wavelength lasers provide a sensing range of 660 to 673 nm and an output power of 250 mW. The amplifier systems provide a sensing range of 660 to 1,080 nm with power up to 1 Watt. They offer single spatial and spectral mode output, narrow line width, and tenability. They can boost the output power of diode or gas lasers by a factor of 100. Applications include interferometry, holography, Raman spectroscopy, and atom cooling and trapping. The systems also enable accessibility to the resonance line of Lithium at 671 nm.

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Molded Glass Lenses

Moulded Optics GmbH (Schoffengrund, Germany) offers single-sided rod and blank-molded aspheric lenses made of crown, borosilicate, and high-refractive glass materials in diameter sizes from 2 mm to 100 mm. The aspheric first surface is molded and the spherical second surface is either ground and polished or molded. The lenses are suitable for laser diode collimating and focusing, digital projection, and microscopic measurement. Also available are molded half-ball lenses made from B270, borosilicate, and F2 class materials, available in diameter sizes of 3, 4, 5, and 6 mm, with standard, truncated, and extended center thickness. The hemisphere first surface is molded and the plano second surface is ground and polished. Applications include LED lighting, fiber communications, endoscopy, microscopy, optical pickup devices, and laser measurement systems.

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Hundreds of Gearmotors Drive Times Square Scrolling Sign

With a zoning ordinance requiring businesses to throw up big, bright, eye-catching signs, Times Square in New York City has an illuminated-sign density rivaling Las Vegas. When Toys “R” Us moved into the neighborhood, it contacted Revolution Display Systems, (Toronto, Canada) to create a motor-controlled, synchronous, contiguous moving image that would constitute the location’s storefront. The resulting 165-module “Building Board” is the first large-format scroller matrix in the world.

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Drive Retrofit Update Enables Smoke-Removal System at Atlanta Airport

When the City of Atlanta finalized plans for the capital-improvement project at Hartsfield-Jackson Atlanta International Airport, an integral part of the 10-year, $5.4 billion project included upgrading the ventilation system of the underground Automated People Mover (APM). The APM’s previous ventilation system was adequate when the APM served the A, B, C, and D Concourses. When Concourse E was added and the APM extended — now 3.5 miles long, handling 128,000 passengers an hour — the fans required upgrading to handle additional flow and pressure to meet National Fire Protection Association standards for emergency smoke evacuation. The $3.4-million set up and installation contract for mechanical and electrical equipment was awarded to W.B. Wallis & Co. (Atlanta, GA).

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Device Simulates Spine Motions

The spine is the most complex mechanical system in the human body. With the University of Minnesota in Minneapolis, Instron (Norwood, MA) is utilizing the BioPuls™ Multi-Axial Spine Testing System to characterize the multi-axial dynamism of the backbone. Such testing will help further the understanding of spine kinetics, simulating precisely the complex, coupled motions typical of the spine and impact on spinal procedures. The system can be used to help evaluate the design of new instruments and implants that allow a greater physiological range of motion.

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