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Thermographic Imaging Selecting an IR Camera with the Right Detector

The thermographic imaging characteristics of an IR camera are largely determined by its detector assembly. Infrared radiation (IR) is focused onto the camera’s detector assembly, which is a focal plane array (FPA) that converts IR into a visual image depicting temperature variations across the camera’s field of view (FOV). The FPA consists of thousands of pixels, which could be fabricated from any one of the IR sensitive materials commonly used in these cameras. Most detector materials respond to a selected portion of the IR spectrum (Figure 1). Therefore, a camera selected for any given application should have the appropriate FPA material based on the IR characteristics of objects within the FOV and the user’s study objectives.

Posted in: Articles, Features, ptb catchall, Photonics

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Photonics Tech Briefs Announces 2007 Products of the Year

The votes are in and the winners of the 2007 Photonics Tech Briefs Readers’ Choice Product of the Year Awards have been selected. The three PTB Products of the Year will be presented at a special awards reception and dinner in New York City on April 22.

Posted in: Products, Products

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Compact 6-DOF Stage for Optical Adjustments

Adjustments can be made in all translational and rotational degrees of freedom. NASA’s Jet Propulsion Laboratory, Pasadena, California The figure depicts selected aspects of a six-degree-of-freedom (6-DOF) stage for mechanical adjustment of an optical component. The six degrees of freedom are translations along the Cartesian axes (x, y, and z) and rotations about these axes (θx, θy, and θz, respectively). Relative to prior such stages, this stage offers advantages of compactness, stability, and robustness, plus other advantages as described below.

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

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Product of the Month: 1940nm Diode Laser Arrays

DILAS (Tuscon, AZ) has introduced the first commercially available high-power diode laser arrays operating at 1940nm with wall plug efficiencies (WPE) of >10-percent.

Posted in: Products, Products

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Pyroelectric Detectors

Spectrum Detector (Lake Oswego, OR) manufactures the LiTaO3 Pyro-electric Detector Hybrid for use in applications including energy measurement, power measurement, radiometry, spectral radiometry, and FTIR and IR Gas analysis. The large area, 9 mm spectrally flat pyroelectric detectors are offered in either a voltage or current mode circuit with NEP in the nW range and Rv as high as 13,000 V/W. An optional organic black absorbing coating adds flat spectral response from 0.25 to 14.0 μm.

Posted in: Products, Products

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Vibration Cancellation System

Technical Manufacturing Corporation (TMC) (Peabody, MA) offers Electro-Damp® PZT active inertial vibration cancellation system for use in microlithography, inspection, and metrology tools. Electro-Damp PZT is an active, inertially damped, pneumatic vibration isolator. Electro-Damp features extended stroke piezoelectric actuators, fast settling time in response to stage motion, and it has no soft air suspension. Available in either 3 or 6 degrees-of-freedom, the compact Electro-Damp PZT installs easily.

Posted in: Products, Products

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Power Converters

EMCO (Sutter Creek, CA) provides high voltage power supplies with high performance in miniature packages. Standard, off-the-shelf products range from ultra-miniature high voltage converters occupying 0.125 cubic inches to precision, multi-output, rack-mount high voltage systems. The RoHS high voltage power converters feature low out gassing epoxy, extended operating temperature, and low power consumption models.

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