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July, 2016
Product Highlight: PI’s HexAlign Microrobot
By Scott Jordan, PI (Physik Instrumente) L.P. S
ince the first photonics/telecom boom in the late 1990s, PI (Physik Instrumente) has been
creating microrobots for optics align- ment. Originally developing the technology for astronomical tele- scopes, the positioning systems are now put to use in a variety of ways throughout the photon- ics industry. The company’s H- 206 Hexapod contains fast alignment algorithms, six-axis positioning, virtualized rota- tion, and fast optical or analog metrology.
Waveguide Alignment One of H-206’s signature
capabilities is to find first-light for a coupling and optimize it rapidly — with a single com- mand, and without time- and bandwidth-consuming
With six degrees of freedom, PI’s Hexapods perform complex waveguide alignments.
repetitive
communications with the controlling computer. It achieves this through an automated sequence called “Fast Scan and Align.” As with all com- mands in PI’s General Command Set, the corresponding command is mnemonic and easy to use: FSA. The process engineer can choose between issuing the command to PI’s Windows.dll,
Linux.so, OS X.dylib,
LabVIEW.vi, or just issue the equiv- alent ASCII string. Parameters for FSA are the
Test for gross and fine leaks in as little as 6 minutes.*
scan axes (linear or angular), scan extent, first-light threshold, and the step size appropriate for the cou- pling. FSA will then commence a fast raster scan with fully integrated synchronous optical or analog metro - logy by using the C-887’s built-in optical power meter and analog-digi- tal converter. As the specified first- light threshold is achieved, FSA automatically transitions to a hill- climb gradient search, allowing the system to fully optimize coupling. This hybrid approach, which
combines fast-raster and gradient- search modes, combines the strengths
lock-on to local maxima. Meanwhile the gradient search allows high-reso- lution localization of the best coupling position. For angular FSA alignments,
rotational motions are performed around a user-defined rotational center-point. This allows the user to program and place the pivot-point at an optical sweet spot, such as the focus of a lensed element or the out- put face of a waveguide channel.
Solving First-Light on Both Sides
FSA is a key building-block for
high-throughput alignments of dou- ble-ended devices that initialize with zero coupling. Here, another critical element of efficiency is the respon- siveness of the system to general motion commands. The H-206’s capability of performing µm-scale motions that settle to nanometers within 25 ms is key. A signature ben- efit of parallel kinematic mecha- nisms is the high positioning band- width enabled by six actuators oper- ating in parallel. Compared to mas-
Continued on next page
of each. The wide-area capture capa- bility of the raster scan combined with the programmable first-light threshold ensure that the gradient search commences on the main mode of the coupling, avoiding spurious
Only NorCom optical leak technology detects both gross and fine leaks in hermetically sealed packages, this fast. Instead of using multiple technologies
and processes, you can leak test virtually any type of package with one high-speed system. The NorCom 2020™
series inspects hermetically sealed components to
MIL-STD 883 requirements either in seam seal trays, or when already mounted to circuits boards and assemblies. It automatically rejects failed devices, and reports the leak rate for each part, eliminating “divide and conquer”leak testing.
NorCom 2020™
Try it free. Send us your package samples today, for a leak test evaluation and report at no charge. *Note: Test time is dependent on package volume
www.norcomsystemsinc.com
610-592-0167 1055West Germantown Pike Norristown, PA 19403 USA
See at SEMICON West, Booth 5648
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