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Creators/Authors contains: "Nair, Manav"

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  1. ; ; ; ; ; ; ; ; ; ; et al (, Proc. SPIE 12188, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V)
    Geyl, Roland; Navarro, Ramón (Ed.)
    A consortium of industrial and academic partners, coordinated by TNO, is working on the realization of a 620mm adaptive secondary mirror (ASM) for the University of Hawaii’s 2.2-meter telescope. The ASM consists of a 620mm-diameter slumped convex aspherical mirror shell, manipulated by 210 variable-reluctance actuators mounted on a light-weighted support frame. The mirror shell is manufactured to the required accuracy at low cost through slumping. The actuators are driven by dedicated PWM current drivers and commanded through a real-time FPGA-based interface. After successful performance testing of several laboratory prototypes, this project will provide the definitive on-sky demonstration of this new technology. We report on the manufacturing and testing of the major subsystems, and on the integration status of the ASM as a whole. 
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  2. ; ; ; ; ; ; ; ; ; ; et al (, Proc. SPIE 12185, Adaptive Optics Systems VIII)
    Schmidt, Dirk; Schreiber, Laura; Vernet, Elise (Ed.)
    We report on progress at the University of Hawaii on the integration and testing setups for the adaptive secondary mirror (ASM) for the University of Hawaii 2.2-meter telescope on Maunakea, Hawaii. We report on the development of the handling fixtures and alignment tools we will use along with progress on the optical metrology tools we will use for the lab and on-sky testing of the system. 
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