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Design Considerations for a Highly Segmented Mirror

Padin, Stephen (2003) Design Considerations for a Highly Segmented Mirror. Applied Optics, 42 (16). pp. 3305-3312. ISSN 0003-6935. http://resolver.caltech.edu/CaltechAUTHORS:PADao03b

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Abstract

Design issues for a 30-m highly segmented mirror are explored, with emphasis on parametric models of simple, inexpensive segments. A mirror with many small segments offers cost savings through quantity production and permits high-order active and adaptive wave-front corrections. For a 30-m f/1.5 paraboloidal mirror made of spherical, hexagonal glass segments, with simple warping harnesses and three-point supports, the maximum segment diameter is ~100 mm, and the minimum segment thickness is ~5 mm. Large-amplitude, low-order gravitational deformations in the mirror cell can be compensated if the segments are mounted on a plate floating on astatic supports. Because gravitational deformations in the plate are small, the segment actuators require a stroke of only a few tens of micrometers, and the segment positions can be measured by a wave-front sensor.


Item Type:Article
Additional Information:© 2003 Optical Society of America Received 26 July 2002; revised manuscript received 16 December 2002. This research was supported by the Caltech Discovery Fund.
Record Number:CaltechAUTHORS:PADao03b
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:PADao03b
Alternative URL:http://www.opticsinfobase.org/abstract.cfm?URI=ao-42-16-3305
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5664
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:27 Oct 2006
Last Modified:29 Aug 2014 14:36

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