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Hyperspectral CMOS Camera

Imec (Leuven, Belgium) is currently sampling the line scan version of its hyperspectral imaging solution, offering a ready-to-use evaluation kit to the industry to line scan and analyze specific sample material. Imec’s line scan solution monolithically integrates hyperspectral filters on a CMOSIS CMV4000 imager (4 megapixel, max 180 fps). It scans 100 spectral bands in the 600-1000nm wavelength range. The filter bandwidth (Full Width Half Max) is about 10nm across the spectral range, with a transmission efficiency of ~85%. The speed of the system corresponds to an equivalent speed of 2,000 lines per second.

Posted in: Products, Photonics

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High-Resolution Infrared Cameras

DRS Technologies, Inc. (Arlington, VA) has expanded its Tamarisk® product line by introducing the high-resolution Tamarisk®640, which is designed for original equipment manufacturers (OEMs) to incorporate into their products. The Tamarisk®640 camera module generates a sharp thermal image with a resolution of 640 × 480 pixels, advancing the groundbreaking technology of the tiny Tamarisk®320 released in 2011.

Posted in: Products, Photonics

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MEMS Emitter

Cal Sensors (Santa Rosa, CA) has introduced a new MEMs Pulsed Emitter (MPE), a broadband source of quasi-black body pulsed light that operates over the 1 to 20 micron infrared (IR) spectrum. Designed with patented, thin-membrane, thermo-resistive material, the MPE combines excellent quality with high signal, fast pulses and long life.

Posted in: Products, Photonics

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Partitioned-Interval Quantum Optical Communications Receiver

The receiver structure described here improves upon the performance of optical communications links, achieving high sensitivity and high data rates even with extremely weak optical signals. The proposed quantum receiver in this innovation partitions each binary signal interval into two unequal segments: a short “pre-measurement” segment in the beginning of the symbol interval used to make an initial guess with better probability than 50/50 guessing, and a much longer segment used to make the highsensitivity signal detection via field-cancellation and photon-counting detection. It was found that by assigning as little as 10% of the total signal energy to the pre-measurement segment, the initial 50/50 guess can be improved to about 70/30, using the best available measurements such as classical coherent or “optimized Kennedy” detection.

Posted in: Tech Briefs, Photonics, Briefs

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Cobra Fiber-Optic Positioner Upgrade

This technology could be used for applications requiring precise location of a small object within a small circular area, such as in medical lasers. A prime focus spectrometer (PFS), along with corrective optics, will mount in place of the secondary mirror of the Subaru telescope on Mauna Kea, Hawaii. This will allow simultaneous observations of cosmologic targets. It will enable large-scale galactic archeology and dark energy surveys to help unlock the secrets of the universe.

Posted in: Tech Briefs, Photonics, Briefs

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Practical UAV Optical Sensor Bench With Minimal Adjustability

A multiple-pass optical platform eliminates essentially all optical alignment degrees of freedom, save one. A fourpass absorption spectrometer architecture is made rigid by firmly mounting dielectric-coated mirror prisms with no alignment capability to the platform. The laser diode beam is collimated by a small, custom-developed lens, which has only a rotational degree of freedom along the standard optical “z” axis. This degree is itself eliminated by adhesive after laser collimation. Only one degree of freedom is preserved by allowing the laser diode chip and mount subassembly to move relative to the collimating lens by using over-sized mounting holes. This allows full 360° motion of a few millimeters relative to the lens, which, due to the high numerical aperture of the lens, provides wide directional steering of the collimated laser beam.

Posted in: Physical Sciences, Photonics, Briefs, TSP

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Optical Thin Films on Complex Substrate Geometries

Anext-generation low pressure chemical vapor deposition (LPCVD) optical thin film coating process is permitting the manufacture of interference filter coatings, such as single wavelength, dual band and broadband AR, cold mirror, dichroic, and conductive. The enhanced thin film IsoDyn™ process, designed by Deposition Sciences, Inc. (DSI) is now being used to produce conformal coatings on complex substrate geometries. This capability allows for a myriad of new applications that may require uniform, multilayer coatings on complex shapes, ranging from simple ball lenses to almost any imaginable optical shape.

Posted in: Features, Photonics, Articles

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