Silicon Carbide Lightweight Optics With Hybrid Skins for Large Cryo Telescopes

Award Information
Agency:
National Aeronautics and Space Administration
Amount:
$599,780.00
Program:
SBIR
Contract:
NNX11CA02C
Solitcitation Year:
2008
Solicitation Number:
N/A
Branch:
N/A
Award Year:
2011
Phase:
Phase II
Agency Tracking Number:
084348
Solicitation Topic Code:
S2.04
Small Business Information
Optical Physics Company
26610 Agoura Road, Suite 240, Calabasas, CA, 91302-3857
Hubzone Owned:
N
Woman Owned:
N
Socially and Economically Disadvantaged:
N
Duns:
160209102
Principal Investigator
 Marc Jacoby
 Principal Investigator
 (818) 880-2907
 mjacoby@opci.com
Business Contact
 Gail Erten
Title: Business Official
Phone: (818) 880-2907
Email: gerten@opci.com
Research Institution
 Stub
Abstract
Optical Physics Company (OPC) has developed new silicon carbide (SiC) foam-based optics with hybrid skins that are composite, athermal and lightweight (FOCAL) that provide an enabling capability for performing NASA space missions that will require 2 to 3 meter class cryogenic mirrors for infrared telescopes. The key development in the Phase I program was the replacement of OPC monolithic SiC skins with SiC fiber reinforced/SiC CVD hybrid skins on 1.5" coupons, 4" flat and then 12" powered optics. This innovation avoids scale-up problems that include the inherent stress in the monolithic skins which can result in skin cracking during the substrate manufacturing and finishing processes, the non-uniformity of the .040"-.050" thick monolithic skins that typically require .010"-.015" of material removal before a continuous surface can be achieved for optical finishing, the long schedule of manufacturing the mirror substrate, and the large $2M/m2 cost to produce the polished mirror. The hybrid skin technology provides increased skin strength and toughness to enable the foam based technology to produce meter class mirrors without skin cracking. The manufacturing time and CVD chamber cost are reduced because premanufactured SiC fibers are used to provide the bulk of the skin mass rather than laying down a monolithic skin atom by atom via CVD. The net effect is to produce a SiC FOCAL mirror substrate that is stronger, tougher, scalable to meter class, and potentially better than 50% faster and cheaper to manufacture. OPC proposes to demonstrate that the hybrid skin technology developed in Phase I can be successfully applied to manufacture a 22" diameter F/2 spherical SiC FOCAL hybrid skin substrate and then polish it into a precision mirror on a Phase II program.

* information listed above is at the time of submission.

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