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technology products sensors and detectors dual single photon counting module


Aurea Technology has launched its newly designed SPD_A_M2, a dual single photon counting module, which it claims is the first such product available globally. The SPD_A is a family of


ultra low noise, high quantum efficiency, near infrared (900 to 1,700nm) single-photon detectors. The detectors’ Geiger-mode InGaAs avalanche photodiodes and thermoelectric coolers ensure a low and stable dark count, with a performance better than 5.0 x 10-6


ns-1 . Thanks to


its exceptional sensitivity in high level detections, the SPD_A largely surpasses photomultipliers, or PMTs. While most photomultipliers count a QE below 1 per cent in near infrared, the SPD_A boasts a QE that is adjustable up to 25 per cent.


lead salt sensors and drive electronics


Wavefront sensor


Imagine Optic has introduced its HP-16, the latest addition to its HASO family of Shack- Hartmann wavefront sensors for adaptive optics and metrology applications. The HP-16 provides ~λ/300 accuracy


The SPD_A series also provides plug-and-play connections to personal computers via a USB interface, allowing users to adjust detection efficiency and tune the gate-width and delay easily. Though it comes with its own graphical user interface software, end-users are free to develop their own with LabView or C++. en.aureatechnology.net


combined with a repeatability of ‹λ/400. The device is delivered with HASOv3 wavefront analysis software that enables users to perform both zonal and modal wavefront reconstruction, as well as allowing the visualisation of spot data and raw camera images. Optional software add-ons enable users to calculate the PSF, MTF and Strehl ratio. The HP-16’s exceptional accuracy makes it


suitable for the nanometric characterisation of mirrors and catadioptric systems, as well as for aligning high-precision optical systems. www.imagine-optic.com


configuration, available as 1 x 1mm detectors in a TO-46 can, or as 2 x 2mm or 3 x 3mm detectors in TO-5 packages. The company’s new PbS and PbSe


Cal Sensors has launched two new families of lead salt infrared detectors as well as a new digital drive board. The new single channel detector (SCD) and multichannel detector (MCD) families provide industry-leading sensitivity and quality for a variety of infrared sensing applications, while the new digital drive board optimises detector performance. The SCD-13HV (single channel detector-


high-value) PbS detectors are designed to meet today’s demanding requirements for high volume, cost-sensitive applications. Thanks to best-in-class process controls and automated production equipment, the SCD-13HV line combines competitive price/performance with exceptional repeatability and product consistency. Applications for these sensors include fire safety and flame detection, as well as process and quality control. All SCD-13HV products support a glass window or lens


multi-channel detectors (MCDs) provide high sensitivity for detection of up to four distinct materials/gases across the 1-5μm wavelength range. The MCD product family provides exceptional channel isolation (›99.5 per cent) in a compact TO-5 footprint. An optional integrated thermistor within the MCD package optimises temperature compensation, maximising measurement precision. Co-locating the temperature sensor and detector material in a hermetically-sealed TO-5 package ensures they both feel the same temperature variations, reducing environmental effects. The four-channel configuration offers significant opportunities for cost reduction and design simplification minimising the need for multiple individual detectors and complex optics. The technology is well-suited to a variety of applications including industrial and medical gas analysis and emissions testing of vehicles or aircraft. The technique is ideal for environmental applications such as stack monitoring, greenhouse gas analysis and overseeing air quality in confined spaces, including tunnels and underground structures. Finally, the company’s digital drive board optimises signal levels for Cal Sensor’s one to four channel detectors, providing all the electronics necessary to drive the sensor, digitise the output and connect via USB to a computer or microprocessor. Engineers can focus on the challenges of the system’s design by quickly validating detector viability. The boards support PbS and PbSe detector technologies. www.calsensors.com


Mounting post for power/energy sensors


Ophir Photonics has launched its Shock Absorber product, the industry’s first mounting post designed to allow the operation of sensitive pyroelectric laser power/energy sensors in an environment with vibration. This special mount smooths out vibration and eliminates false triggering, reducing the sensor’s susceptibility to vibration by two to 10 times. The company states that the


pyroelectric energy sensors used in power/energy sensors are sensitive to acoustic as well as thermal signals, and can therefore give false readings when subjected to vibration or shock. While, some laser power/energy sensors include a minimum energy setting to eliminate false readings due to noise, the approach reduces the overall sensitivity of the device. Ophir’s Shock Absorber aims to eliminate false signals without affecting the sensitivity of the sensor to valid signals. The Shock Absorber mounting post features a screw embedded in rubber that provides a flexible barrier between the post and the sensor head. This significantly reduces false triggering. The mounting post works with all Ophir energy


sensors, including the PE Series of pyroelectric detectors that provide the highest damage threshold, highest pulse energies, and widest spectral range in the industry. www.ophiropt.com/photonics


34 electro optics l MARCH 2011 www.electrooptics.com


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