Photonics/Optics

Photovoltaic Metallization Paste

DuPont Microcircuit Materials (MCM) (Bristol, UK) has introduced the low temperature processing DuPont™ Solamet® PV414 photovoltaic (PV) metallization paste designed for rotary screen printing to enable high-speed, roll-to-roll processing of thin and flexible solar cells and modules. The new offering was recently qualified at Flexcell, a leading Swiss producer of flexible amorphous silicon thin film modules, for building integrated photovoltaics (BIPV) and mobile solar chargers. Solamet® photovoltaic metallization pastes are key to higher efficiency and lower system costs for both crystalline silicon (c-Si) and thin film PV.

Posted in: Products, Products, Photonics

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Diode Laser System

DILAS Industrial Laser Systems (Tucson, AZ) has introduced a diode laser system with an optical output power of 30W CW and increased beam quality. Its module is integrated into the fiber-coupled turnkey diode laser COMPACT platform. The laser system features a beam parameter product of ±11mm mrad (100μm fiber core diameter, NA 0.22). The standard package comes with a fiber cable and focusing head.

Posted in: Products, Products, Photonics

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Vibration Isolation in Optical Test Systems

In the world of precision motion control there is a continuous pursuit of higher performance, whether it’s resolution, speed, stability, accuracy or step size. Even if a specified device appears on paper to be capable of achieving excellent results, the design of the mechanics and the platform stability play an integral role in achieving peak performance.

Posted in: Articles, Features, ptb catchall, Photonics

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Improving Microinverter Performance in Photovoltaic Systems

We have known for decades that the sun radiates enough energy to meet the world’s needs for power, both now and in the future. As in any energy conversion from original source to a “usable” form, however, the various stages of adaptation introduce efficiency losses. In the case of the photovoltaic system, this has limited what could be exponential growth. In fact, the best performance available from solar cells of any kind (excluding the concentrated approach) never rose above 15% efficiency. In cascade to the solar cell itself, a classical centralized inverter would add barely more than 90% efficiency to the chain. This “poor” performance and the obvious lack of large successes has also helped to keep the installation costs very high.

Posted in: Application Briefs, Applications, ptb catchall, Photonics

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Control Program and Optical Improvements of Fresnel Microspectrometer

This innovation is suitable for optical fiber communications and medical applications where multiple optical fibers are used.A microspectrometer has a circular geometry, and is designed with the Fresnel diffraction equation. This enables a dramatic miniaturization of the optical parts of a spectrometer over 100 times by volume. Therefore, it enables the construction of spectrometer arrays such as 100×100 microspectrometers for tunable multispectral or hyper-spectral imaging. It can be used for a massive, simultaneous spectral scan from multiple optical sources such as 10,000 optical fibers.

Posted in: Briefs, TSP, ptb catchall, Tech Briefs, Photonics, Physical Sciences

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Miniature Laser Magnetometer

This device can be used for satellite, aircraft, and ground-based magnetic field sensors.A conceptual design has been developed for a miniature laser magnetometer (MLM) that will measure the scalar magnitude and vector components of near-Earth magnetic fields. The MLM incorporates a number of technical innovations to achieve high-accuracy and high-resolution performance while significantly reducing the size of the laser-pumped helium magnetometer for use on small satellites and unmanned aerial vehicles (UAVs). The MLM will have a dynamic range up to 75,000 nT. The scalar sensitivity will be 1 pT(Hz)–1/2 at 1 Hz with an accuracy of 0.2 nT. The vector sensitivity will be 1 pT(Hz)–1/2 at 1 Hz with an accuracy of 0.5 nT.

Posted in: Briefs, TSP, ptb catchall, Tech Briefs, Photonics, Physical Sciences

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Low-Power, Self-Calibrated Vector Magnetometer

NASA satellites measure vector magnetic fields around planets to learn about the geology of the planets. Existing fluxgate magnetometers drift as a result of temperature and aging. A magnetometer whose calibration was stable would improve investigations of planets and the solar system.

Posted in: Briefs, ptb catchall, Tech Briefs, Photonics

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