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Laser Diode

The GPL 105 series laser diode module system from BEA Lasers’ (Elk Grove Village, IL) includes a 3/8” NPT-threaded housing with mounting hardware and a plug-in USB-type power supply. Cable connector length is 36” and available patterns are red dot or line with a nominal focal length of 17”.

Posted in: Products, Products, Photonics

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Scan System

SCANLAB AG (Puchheim, Germany) has introduced a new high-end scan system, called excelliSCAN, that utilizes galvo scanners with ultra-precise digital angle sensors and a completely new SCANahead servo control to enable dynamic laser processing unencumbered by the existing limitations of conventional servos with tracking error. excelliSCAN’s new mechanical design provides enhanced stability, more compactness and optimal heat removal under dynamic load.

Posted in: Products, Products, Photonics

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Two-Axis Gear-Drive Gimbal

AMG-GR gear-driven motorized gimbals from Aerotech (Pittsburgh, PA) provide economical, high-accuracy elevation- over-azimuth positioning. The AMG-GR standard circular cells range from 100 mm to 300 mm in diameter. Cell mounting options include a centered (balanced) cell or a front-surface reflection option where the front of the optic is located on the axes of rotation. Special configurations can accommodate non-circular optics, cameras, sensors, and round optics larger than 300 mm in diameter. The modular design permits each gimbal mirror cell to be easily modified or replaced with different shaped cells to accommodate sensors or other asymmetrically-shaped payloads.

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3D Machine Vision Using Laser Triangulation

Applications for 3D machine vision are rapidly expanding in a variety of industries for several reasons. The first is that vision systems can lower production costs by increasing yields and/or reducing scrap product and wasted raw material. One example of this would be extruded products from various materials (rubber, plastic, metal), where it’s vital to know as soon as the process goes out of specification.

Posted in: Application Briefs, Articles, Applications, Photonics

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Hyperspectral Sensing for Defense and Security Applications

The successful exploitation of hyperspectral imaging sensors depends on the availability of accurate and complete spectral signature libraries. Coupled with the appropriate spectral signature library, images collected with hyperspectral sensors provide the means to survey large areas identifying and characterizing materials, detecting a wide range of camouflaged targets, and detecting disturbed surfaces.

Posted in: Articles, Features, Photonics

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Domain-Engineered Magnesium-Oxide-Doped Lithium Niobate for Lidar-Based Remote Sensing

Current work provides a path to the development of compact, single-frequency, spectroscopically useful laser sources. Goddard Space Flight Center, Greenbelt, Maryland There are several frequency conversion applications associated with lidar-based remote sensing that would benefit from the use of high-quality, complex (i.e., chirped, multi-section, or otherwise modulated) domain-engineered magnesiumoxide- doped lithium niobate (MgO:LN). While congruently melting lithium niobate (CLN) has been explored in detail over the last decades, it is known to be highly susceptible to photorefractive damage, which has limited the achievable performance of some QPM-assisted (quasi phase matching) structures that are commercially available. The demand for high-performance engineered nonlinear optical (NLO) materials, in terms of power handling, efficiency, conversion bandwidth, and accessible wavelength range, has driven the development of high-quality, large-area wafers of MgO:LN. While commercial outlets for these materials exist, there is still a need to expand the achievable performance of these structures (i.e. larger aperture bulk structures, higher efficiency waveguide structures, and implementation of sophisticated poling designs that increase achievable conversion bandwidths).

Posted in: Briefs, Tech Briefs, Photonics

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Fiber-Optic Sensor for Aircraft and Structure Lightning Measurement

Langley Research Center, Hampton, Virginia An optical-fiber sensor based on Faraday Effect was developed for measuring total lightning current. Designed for aircraft installation, it is lightweight, non-conducting, structure conforming, and is immune to electromagnetic interference, hysteresis, and saturation. It can also be used on windmills, lightning towers, and can help validate lightning detection network measurements.

Posted in: Briefs, TSP, Tech Briefs, Photonics

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