Dr. Stephen D. Vining Profile

Dr. Stephen D. Vining

at Cornerstone Research Group Inc

SPIE Involvement:

Author

Publications (2)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 26 October 2004 Paper

Laminated electroformed shape memory composite for deployable lightweight optics

Steven Varlese, Melville Ulmer, Lisa Hardaway, Matthew Everhart, Semyon Vaynman, Gary Emerson, Michael Graham, Jonathan Echt, Matvey Farber, Stephen Vining

Proceedings Volume 5542, (2004) https://doi.org/10.1117/12.561485

KEYWORDS: Composites, Mirrors, Nickel, Reflectors, Composite resins, Carbon, Surface finishing, Aerospace engineering, Interfaces, Optics manufacturing

Read Abstract +

Advances in earth and space instrumentation will come from future optical systems that provide large, deployable collecting areas of low areal mass density (< 10 kg/sq meter), affordable costs of fabrication ($10k/sq meter), and production times of a few years or less. Laminated optics comprised of an electroformed, replicated nickel optical surface supported by a reinforced shape memory resin composite substrate have the potential to meet the requirements for rapid fabrication of lightweight, monolithic, stowable, large optics, where large is defined to be 8 meters in diameter or larger. The high stiffness of a deployable composite substrate and a high quality, thin, electroformed metal optical surface combine the best properties of these disparate materials to provide a robust yet lightweight mirror system to meet the needs of future missions. The unique properties of shape memory resins in the composite provide a larger range of design parameters for production of usable optics. Results are presented from optical and structural tests of various surface and substrate constructions that may be solutions to the key issues, which are primarily material interface stress control, stability, and deployment repeatability. Initial requirements analysis and material properties measurements that determine both system and individual material target performance are presented.

Proceedings Article | 30 January 2004 Paper

Multicomponent composites and their application in replica mirrors for lightweight space-based optics

Stephen Vining, Patrick Hood

Proceedings Volume 5166, (2004) https://doi.org/10.1117/12.504641

KEYWORDS: Composites, Mirrors, Glasses, Carbon, Nanofibers, Space mirrors, Surface finishing, Materials processing, Metals, Polymers

Read Abstract +

Research and development in multi-component composites demonstrated new material and fabrication concepts for mirrors for space-based optics. Cornerstone Research Group, Inc., effort, conducted under contract to the Air Force Research Laboratory, developed new organic and inorganic composite materials and investigated their potential for application as light-weight, low-cost alternatives mitigating the drawbacks of conventional materials (glass and metals) and fabrication processes for space-based mirrors. This development demonstrated the feasibility of multi-component organic composites integrating cyanate ester resin with several reinforcements, especially carbon fabric and nanofibers. It demonstrated feasibility of high-quality cyanate ester-based syntactic composite (structural foam composed of microspheres embedded in resin). The development also demonstrated initial feasibility of multi-component inorganic composites integrating a proprietary inorganic resin with particulate and nanofiber reinforcements. These new materials (both organic and inorganic composites) show strong potential for achieving major reduction in mirror areal density (compared with current operational mirrors) while achieving strength, stiffness, and thermal properties required for space applications. Finally, this project demonstrated feasibility of a replication approach to mirror fabrication. With this fabrication technology, a composite mirror is cast directly to net figure and finish. This dramatically simplifies the mirror fabrication process, thereby enabling less expensive tooling than conventional practice for glass or metal mirrors. In production lots of identical mirrors (e.g., spacecraft constellations), the replication approach will provide radical reduction in mirror costs by eliminating the lengthy, expensive grinding and polishing processes for individual units.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years