Features

Rotary Union

Duff-Norton (Charlotte, NC) offers the 1900 Series Rotary Union® that provides a rotating seal between fluids and a revolving roll or drum. Commonly conducted media are water, hot oils, chemicals, hydraulics, and air. The union is designed for very high pressure applications to 10,150 psi, and with maximum temperature ratings to 248 °F. Standard models feature nickel-treated carbon steel or stainless steel construction, and a double-acting thrust bearing and bronze bushing. Sizes range from 1/4 to 3".

Posted in: Products, Motion Control

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Nanopositioning Controller

PI, L.P. (Auburn, MA) has introduced the E-621.CR modular controller for piezo-driven nanopositioning systems that features high-bandwidth analog and networkable digital interfaces. The controller integrates a low-noise piezo power amplifier, a high-speed servo controller, sensor electronics for absolute-measuring capacitive nanopositioning sensors, and 20-bit A/D and D/A converters.

Posted in: Products, Motion Control

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Brushless Motor

Maxon Precision Motors (Burlingame, CA) has introduced the EC-16 sterilizable brushless motor that has been assembled so that the coils are outside the rotor, providing good heat dissipation. Steam sterilization is specified at 273 °F at up to 2.3 bar for 20 minutes. The motor can be sterilized at least 100 times in an autoclave. The diameter is 0.63" with a length of 2.2". Continuous output power is 40 watts, while maximum speed is 50,000 RPM. Ambient temperature range is -4 to 275 °F, and maximum continuous torque is up to 1.78 oz-in, depending on the winding. The motor uses high-energy samarium cobalt magnets for a mechanical time constant of 5 ms. A sterilizable gearhead is available in 55 ratios ranging from 3.8:1 to 4592:1 with a maximum input speed of 8,000 RPM.

Posted in: Products, Motion Control

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Rotary Transducer

SpaceAge Control (Palmdale, CA) has released the Series R rotary transducer that provides rotational measurements from 1 to 150 turns. The rugged device uses ThreadSensor™ technology for accurate and repeatable measurements in rotational sensing. Applications include potentiometers, encoders, resolvers, and synchros. Dual and quad redundancy features are available in the same package for failsafe or mission-critical applications.

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DPSS Micromachining Puts Shine on Industrial Molds

Modular diode-pumped solid state (DPSS) lasers make it easy to tailor laser sources to micromachining applications, such as steel and ceramic molds. Lasers are now used to micromachine virtually every type of material, including metals, plastics, glass, and ceramics. Micromachining is a highly diverse market that uses flash-pumped, diode-pumped solid-state (DPSS), and excimer lasers. Excimer lasers provide more average power at shorter wavelengths, enabling more precise micromachining, but as DPSS lasers have added increased average output power to their lower acquisition and operation costs, small footprint, improved mode operation, and high-repetition pulse rate, DPSS systems are grabbing a larger share of the micromachining market.

Posted in: Features, ptb catchall, Photonics, Articles

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Product of the Month: Transient Absorption Spectrometer

Designed for the study of ultrafast phenomena such as electronic deactivation, intersystem crossing, vibrational relaxation, internal conversion, and intra-molecular electron transfer, Newport Corp.’s (Irvine, CA) Helios is a pump-probe transient absorption spectrometer used to monitor extremely short-lived optically absorbing states. The experimental time window ranges from 150 fs to 3.2 ns, covering wavelengths of 350 to 1600 nm. The system is completely turnkey, including all of the optics, optomechanics, the delay line, spectrometer in the optical unit, and a PC containing the data acquisition hardware and software. The system is designed to work with an amplified Ti:Sapphire femtosecond laser. The system captures the spectral and kinetic data required for investigating photoexcitation events on the sub-picosecond and longer timescale.

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Fiber Laser

Aculight (Bothell, WA) built the polarized Picasso Model PF1550PM-30 fiber laser for military and commercial applications. The fiber laser produces 4- to 6-ns pulses at repetition rates from 50 kHz to 200 kHz with 1-W average output power. It generates maximum pulse energy of 20 μJ at 50 kHz. The unit’s 1.54-μm output is diffraction limited. The 1-μm version, Picasso Model PF1060-40, generates 3- to 5-ns pulses at repetition rates between 100 kHz and 1 MHz. It produces up to 10 W of average power at a repetition rate of 1 MHz and maximum peak powers of 30 kW. The unit’s output is less than 1.4 times the diffraction limit. All Picasso units measure just 3.5 × 11 × 13" and weigh 16 pounds or less.

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