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Enhancing Image Clarity in the SWIR

A chromatic or color-corrected lenses for use in the visible portion of the electromagnetic spectrum have been addressed in literature, textbooks, and industry journals as early as the 18th Century. Many of these accounts by scientists and optical designers detail a method of selecting two dissimilar materials to form an achromatic pair or doublet with the ability to greatly counter image blurring resulting from the dispersive nature of refractive optical elements. Whether these tried and true optical formulae produce equally successful results in wavelengths beyond the visible range warrants further examination.

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Static vs. Dynamic Detection of Bugs in Safety-Critical Code

In the never-ending quest to produce high-quality software, traditional dynamic testing plays a fundamental role. The weakness of dynamic testing is that it is only as good as the test cases. To be effective, a great deal of effort must go into writing or generating good test cases, and doing so can be very expensive.

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From NASA to NASCAR: Space-Age Technology Finds Its Way into Auto Racing

Although it may not be obvious to the untrained eye, a number of technical innovations developed for aerospace and defense applications have found their way into the sport of auto racing. Take thermal barriers and driver “cool suits,” for example. Heat coming from the engine, transmission, exhaust system, oil coolers, etc., can cause temperatures inside the fully-enclosed cockpit of a modern stock car to reach 140- 160°F. Because of its close proximity to the exhaust headers, the metal floorboards beneath the gas pedal can heat up to 330°F or more — hot enough to fry an egg...or a driver’s foot.

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How a Supercomputing Innovation Accelerated a Business

Larry Lukis Founder and CTO Proto Labs, Inc. Maple Plain, MN Proto Labs is a quick-response custom manufacturer that provides design engineers with prototypes of plastic parts faster than anyone in the world. Our Protomold division produces prototypes (and short run production parts) by injection molding, and our First Cut Prototype division produces prototypes by CNC machining plastic stock.

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Protecting AC Motors From Destructive Shaft Currents

The use of variable-frequency drives (VFDs) to control AC motors has increased dramatically in recent years. In addition to low operating cost and high performance, they save energy. Today, the challenge facing system designers and engineers is to minimize damage to AC motors from shaft current.

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Getting on the Right Motion Bus

As modern machines have become more advanced, the complexity involved in motion control has escalated. Today, servos have replaced cams and gears on machines and multiple axis of synchronized motion control have become commonplace. Distributed motion control requires busses able to handle rigid jitter and timing demands including:

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Integrated Motor Control Meets Aviation Needs

The trend in aircraft design is toward more efficient brushless DC motors. A integrated motor drive module for brushless DC motors from International Rectifier (El Segundo, CA) reduces the effort of programming the motor control and simplifies certification. Because the device is configured for sensorless field oriented control, the elimination of Hall sensors improves reliability while reducing component count. It enables the aircraft to achieve greater fuel economy and lower maintenance costs.

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