{"product_id":"lightweight-tn-plane-actuated-deformable-mirrors-michael-j-shepherd-9781288332632","title":"Lightweight Tn-Plane Actuated Deformable Mirrors for Space Telescopes","description":"This research focused on lightweight, in-plane actuated, deformable mirrors, with the ultimate goal of developing a 20-meter light gathering aperture for space telescopes. The 0.127 meter diameter deformable mirror small scale testbed was modelled in finite elements using MSC. Nastran software and then used as a basis for a quasi-static controller. Experi- mental tracking of Zernike tip, tilt, and defocus modes was accomplished. The analytical solutions to plate-membrane and beam-string ordinary differential equations were developed. A simplified approach to modelling the axisymmetric cases was also presented. A novel static control strategy, the Modal Transformation Method, was developed to form Zernike surfaces within an interior, or clear aperture, region using a number of statically-actuated Bessel-based vibration modes. The scaling problem for membrane optics is addressed. Significantly, it is shown linear modelling may correctly explain the behavior of small-scale models, but only non-linear models will account for the important terms which govern the full-scale large aperture membrane telescopes.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eAuthor:\u003c\/b\u003e Michael J. Shepherd\u003cbr\u003e\u003cb\u003eISBN-10:\u003c\/b\u003e 1288332637\u003cbr\u003e\u003cb\u003eISBN-13:\u003c\/b\u003e 9781288332632\u003cbr\u003e\u003cb\u003ePublisher:\u003c\/b\u003e Biblioscholar\u003cbr\u003e\u003cb\u003eLanguage:\u003c\/b\u003e English\u003cbr\u003e\u003cb\u003ePublished:\u003c\/b\u003e 11\/21\/2012\u003cbr\u003e\u003cb\u003ePages:\u003c\/b\u003e 240\u003cbr\u003e\u003cb\u003eFormat:\u003c\/b\u003e Paperback\u003cbr\u003e\u003cb\u003eWeight:\u003c\/b\u003e 0.75lbs\u003cbr\u003e\u003cb\u003eSize:\u003c\/b\u003e 9.21h x 6.14w x 0.51d","brand":"Michael J. Shepherd","offers":[{"title":"Paperback","offer_id":48449435566335,"sku":"9781288332632","price":20.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/2982\/9887\/files\/img_99bfe4eb-2874-413b-a11b-a37af046054d.jpg?v=1777263380","url":"https:\/\/www.whiterainbookhouse.com\/products\/lightweight-tn-plane-actuated-deformable-mirrors-michael-j-shepherd-9781288332632","provider":"WR Book House","version":"1.0","type":"link"}