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Crystal Rotation Stage

Cleveland Crystals (Highland Heights, OH) has introduced the CRS150 counter rotation stage that can facilitate simultaneous angle-tuning of two crystals oriented for compensation of birefringent walkoff. The walkoff compensation configuration provides nonlinear optical conversion, reduces distortion, and minimizes beam displacement. Mounted in a compact footprint, the CRS150 provides operation via computer control with phase-matching software for second harmonic generation or optical parametric oscillation with specific crystals, manual micrometer adjustment, or standalone remote control of a motorized micrometer encoded for readout of relative position.

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Document Camera

The TT-02 from ELMO USA Corp. (Plainview, NY) is an XGA-output Visual Presenter that enables users to share information, documents, and small 3D objects with audiences. The camera contains a 5.3× optical zoom, 8× digital zoom, and one-touch auto focus. It features an 850,000-pixel scan CCD for reproduction of full-size A3 documents and 3D objects. At a speed of 20 fps, it captures and displays objects in real time. Its arm design allows the camera to be moved up and down to offer point-of-view images. A switch-selectable output provides an RGB digital signal that goes to a DLP or LCD projector. The signal can be output to NTSC to connect a TV or VCR for viewing and recording. The TT-02 also can be used as a switching device to loop through a PC’s output, allowing the user to switch between the shooting area and a PC display such as a PowerPoint® presentation.

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Optical Flats

Optical Surfaces (Surrey, UK) offers standard and custom optical flats measuring up to 600 mm in diameter and manufactured of materials such as glass, Zerodur, and silica. The optical flats can be used for measuring surface flatness of polished areas by determining the variations between work surfaces and the surface of the optical flat. They are suitable for applications in astronomy, laser beam steering, inspecting gauge blocks for wear and accuracy, and interferometric flatness testing of prisms, filters, and optical windows. Surface accuracy of up to lambda/20 p.v. can be achieved, as well as surface roughness of 10 A rms on individual flats. Optics up to 450 mm in diameter are provided with a Fizeau interferometric test report; larger flats are quality assured using the Ritchey-Common test procedure.

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CMOS Camera

Lumenera Corp. (Ottawa, ON, Canada) has introduced the Lw290, a USB 2.0 digital camera based on the company’s 1080P HD sensor. The 16:9 HD format, 2.0-megapixel CMOS sensor provides 20 frames per second at full 1920×1080 resolution. Higher frame rates are available at lower resolution, with full sub-window control and live focusing modes. The camera offers dynamic range of >60dB and blooming for image detail. No framegrabber is required. It provides plug-and-play integration with any DirectShow application.

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Diode Laser Platform

Spectra-Physics, a Division of Newport Corp. (Tucson, AZ), has released a 900- to 980-nm diode laser platform based on epitaxial design. The diode laser platform provides CW power conversion efficiency to 71% for 940-nm single emitters (15°C case temperature). More than 68.5% peak PCE at 25°C may be achieved from 100-μm-wide, 3-mm-long single emitters designed for 8-W output power applications.

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Diaphragm Pumps

Thomas Products Div. (Sheboygan, WI) offers the Series 5002 miniature diaphragm liquid pumps, designed for all-liquid or mixed wet/dry pumping applications. Model 5002F pumps are single-head and measure 1.99 × 1.18 × 3.19". Model 5002FZ pumps are 1.99 × 1.18 × 4.88" and have twin heads. Both are oil-less. Standard materials include thermoplastic housings with ethylene propylene diene monomer diaphragms. Optional housing and diaphragm materials are available for use with aggressive media. Open flow is rated at 400 ml/min for single-head, and 850 ml/min for twin-head. Maximum pressure is rated at 40 m H2O, and maximum dry suction is 6 m H2O. Both 12 VDC and 24 VDC versions are available, with electromechanical compatibility protection included.

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Motor Driver

Allegro MicroSystems (Worcester, MA) has introduced the A3901 dual H-bridge low-voltage motor driver. Capable of operating one stepper motor or two DC motors, the unit is designed for portable applications with a power-off current of 50 nA and an operating voltage range of 2.5 V to 5.5 V. MOSFET output stages reduce voltage drop and power dissipation of the outputs. Internal circuit protection includes thermal shut down and hysteresis, transient-suppression diodes, and crossover current protection. The device is supplied in a lead-free, ten-lead MLP power package (3 × 3 × 0.75 mm) with an exposed thermal pad. Both H-bridges can be paralleled for higher current operation.

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