Photonics/Optics

Near-Infrared Photon-Counting Camera for High-Sensitivity Observations

Extremely faint phenomena and NIR signals emitted from distant celestial objects can be observed and imaged. The dark current of a transferred-electron photocathode with an InGaAs absorber, responsive over the 0.9-to-1.7-μm range, must be reduced to an ultralow level suitable for low signal spectral astrophysical measurements by lowering the temperature of the sensor incorporating the cathode. However, photocathode quantum efficiency (QE) is known to reduce to zero at such low temperatures. Moreover, it has not been demonstrated that the target dark current can be reached at any temperature using existing photocathodes.

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

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Goniometric Radiometer

The LD8900 Goniometric Radiometer from Ophir Photonics Group (Logan, UT) makes X-Y, holographic, and 3D measurements without moving either the detector or the source. The design allows the farfield profiler to characterize and confirm the divergence of light passing through holographic materials, such as those used for computer display screens, smartphones, and instrument panels. The 3D capability of the LD8900 makes it possible to measure radially symmetric divergences or angularly different types.

Posted in: Products, Products, ptb catchall, Photonics

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Thermal Surveillance Cameras

Vumii (Atlanta, GA) has added four thermal camera lines to its imaging solutions portfolio: CompactSec™, EyeSec™, DualSec™, and RangeSec™. The IP-enabled CompactSec thermal camera is available in three models: 8.5mm lens for 65° field of view; 19mm lens for 28° field of view; and 35mm lens for 15° field of view. The EyeSec, a line of uncooled thermal cameras, has a wide variety of lens and resolution configurations, including a 15-100mm continuous zoom model. The camera provides thermal video through darkness, light fog, or smoke. The EyeSec line features IP or analog communication options with 320 x 240 25μ or 640 x 480 17μ resolution. The DualSec dual-video (thermal and visual) channel pan tilt camera system allows mediumrange observation and detection. The RangeSec imager, a high-sensitivity, cooled midwave (3-5 μm) thermal camera, utilizes a 19mm to 275mm continuous zoom (29° to 2° field-ofview) or a 47.5mm to 687mm continuous zoom lens (12° to 0.8° field-of-view).

Posted in: Products, Products, ptb catchall, Photonics

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Color Sensors

TAOS (Plano, TX) has announced the TCS3x71 and TCS3x72 Series of Digital Color RGB and Proximity Sensors. When coupled with IR LED, the sensors also provide proximity detection within a range of lighting conditions and through a variety of attenuating materials. The TCS3x72 Series is the industry’s first color sensor with an IR blocking filter integrated directly on-chip and localized only to the color sensor photodiodes. In addition, the on-chip IR blocking filter enables the devices to perform ambient light sensing (ALS).

Posted in: Products, Products, ptb catchall, Photonics

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Laser Diode Module

Power Technology (Little Rock, AR) offers a violet laser diode module with 250mW of output power at 405nm. The module meets OEM analytical and general scientific laser application needs, including laser-induced fluorescence, microscopy, spectroscopy, lithography, data storage, flow cytometry, cancer detection, remote optical sensing, holography, and illumination.

Posted in: Products, Products, ptb catchall, Photonics

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CW and Pulsed Laser Diode Driver

Analog Modules (Longwood, FL) has released its CW and pulsed laser diode driver, Model 784. The 50A, 2.5V driver requires +5VDC input power. Pulsewidths vary from 600ns to CW, with power capabilities up to 125W with adequate cooling. The 784 is manufactured as a RoHS-compliant assembly, but military versions are also available.

Posted in: Products, Products, ptb catchall, Photonics

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Industrial Sensors

The FB series M18 plastic DC photoelectric sensors from AutomationDirect (Cumming, GA) are diffuse, polarized reflective and through-beam models. The 18mm devices have sensing distances ranging from 70mm to eight meters. All models feature M12 quick-disconnects and are available in NPN and PNP output logic configurations.

Posted in: Products, Products, ptb catchall, Photonics

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