Tag: Hexapod for Astronomy

50 Hexapod 6-DOF Alignment Systems for the Sub-Reflectors of ALMA, the Largest Telescope Project in the World

The ALMA (Atacama Large Millimeter Array) observatory is the largest and most advanced astronomical telescope system in the world. ALMA is not a classical optical telescope but a combination of up to 66 radio-telescope dishes receiving electromagnetic radiation at millimeter and sub-millimeter wavelength.  The combination of many antennas, spread out over a large area, has […]

Self-Locking Actuator for Hexapod Applications Combines High Push-Pull Force with Picometer Resolution for Active Optical Alignment in Astronomy

1. Introduction Astronomical telescopes usually employ active position control for primary mirror surfaces using motorized mechanical actuators. The motion needed is generally quasistatic, to compensate gravitational and thermal effects. Another application for precision actuators within the telescope at a significantly faster motion response is the high speed tip/tilt control of a secondary or tertiary mirror. […]

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PI (Physik Instrumente) is a leading manufacturer of precision motion control equipment, piezo motors, air bearing stages and hexapod parallel-kinematics for semiconductor applications, photonics, bio-nano-technology and medical engineering. PI has been developing and manufacturing standard & custom precision products with piezoceramic and electromagnetic drives for 4 decades. The company has been ISO 9001 certified since 1994 and provides innovative, high-quality solutions for OEM and research. PI is present worldwide with fifteen subsidiaries, R&D / engineering on 3 continents and total staff of more than 1,000.

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