Features

HBLEDs: Tackle Your Silicone Packaging Problems

It is widely known that the light emitting diode (LED) R&D and commercialization community is striving to produce higher power, bright-white-light LEDs. From both a temperature and UV-resistance standpoint, silicone is rapidly becoming the material of choice for the next-generation chip encapsulant. But as LED manufacturers look to employ silicones in their manufacturing processes, they must be aware of potential problems. Cure inhibition can lead to unacceptable variations in the manufacturing process and thus, the finished product. This article takes a brief look at the benefits of using silicones in high-brightness LED (HBLED) applications, with a focus on potential production floor issues and their solutions.

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Raman Spectrometer

Lambda Solutions (Waltham, MA) has released the Dimension-P Series Raman spectrometers providing real-time analysis and monitoring in pharmaceutical or food processing quality control. The systems are operated via RamanSoft™ software that features proprietary algorithms and automation capability for data acquisition, data processing, and data analysis. The Dimension-P1 and P2 include an external sampling module and the Vector Raman Probe™, an internal sample compartment.

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Color Cameras

PPT VISION (Minneapolis, MN) has added the IMPACT™ T28 and the IMPACT™ T24 to its line of IMPACT T-series color cameras designed for inline industrial vision applications. The IMPACT T28 provides a 1,600 × 1,200 pixel resolution and is suitable for color verification, label inspection, and real-time part sorting. The IMPACT T24 is designed for applications requiring resolution imaging of 1,024 × 768 pixels. Both cameras are suitable for quality verification, and contain an on-board image processor and real-time I/O and Ethernet communications. The cameras are supported by Inspection Builder software, a machine-vision application development package that uses icon-based programming and inspection algorithms for pattern matching, blob analysis, sub-pixel gauging, and character inspection.

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Simulation Software

Liekki (Reston, VA) offers Liekki Application Designer (LAD) v3.1 software for power fiber laser and amplifier simulation. It includes tools for designing systems employing large mode area fibers. Using multimode propagation, the software can calculate the optical power propagation along the doped fiber for each mode in multimode fibers. The user can then evaluate the quality of the output optical beam. LAD v3.1 can calculate the modes for any refractive index profile having radial symmetry. The optical fiber is bent either for packaging purposes or to discriminate against higher order modes. The software features the bending effects in calculations including mode field distortion and power loss, and features radial doping, transient calculations, Monte Carlo analysis, and nonlinear effects threshold power.

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Confocal Optical Pens

Confocal chromatic optical pens from Micro Photonics (Irvine, CA) allow 30 different optical pen configurations for specific depth of field, spot size, working distance, object slope, and photometric efficiency. Users can choose from five magnifiers, ranging from 3.3-mm to 29-mm focal lengths, and six different chromatic lenses, ranging from 130-μm to 27-mm depths of field. Pens can achieve maximum axial resolution of 5 nm, accuracy to 20 nm, and max slope to 87∫ for diffusive objects. Based on white light chromatic aberration, the pens provide lateral resolution of 1.1 μm and vertical resolution of 5 nm. The pens are suitable for applications in profilometry, microtopography, auto-focus vibrometry, in-line inspection quality control, and thickness measurements.

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Photon Image Sensor

Andor Technology (South Windsor, CT) has introduced the iXonEM + EMCCD camera that can detect single photon events without an image intensifier. It offers photon collection efficiencies of up to 95% QE, readout speeds up to 35 MHz, 14- and 16- bit digitization, and thermoelectric cooling to -100°C. The system’s vertical clock parameters provide low spurious noise and minimal smear with short exposures. The camera is suitable for applications in single molecule detection, live-cell multi-dimensional microscopy, spinning disc confocal microscopy, intracellular ion signaling, cell motility, adaptive optics, photon counting, bioluminescence, neutron radiography, and spectral imaging.

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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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