NASA SBIR 2018-II Solicitation

Proposal Summary


PROPOSAL NUMBER:
 18-2- S2.01-8142
PHASE 1 CONTRACT NUMBER:
 80NSSC18P2056
SUBTOPIC TITLE:
 Proximity Glare Suppression for Astronomical Direct Detection
PROPOSAL TITLE:
 Primary Tweeters: Segmented Micro-Mirrors for Picometer-Scale Wavefront Compensation in Space-Based Observatories
SMALL BUSINESS CONCERN (Firm Name, Mail Address, City/State/Zip, Phone)
Boston Micromachines Corporation
30 Spinelli Place, Suite 103
Cambridge, MA 02138
(617) 868-4178

PRINCIPAL INVESTIGATOR (Name, E-mail, Mail Address, City/State/Zip, Phone)
Steven Cornelissen
sac@bostonmicromachines.com
30 Spinelli Place
Cambridge, MA 02138 - 1070
(617) 868-4178

BUSINESS OFFICIAL (Name, E-mail, Mail Address, City/State/Zip, Phone)
Tracy Raymond
tracy@bostonmicromachines.com
30 Spinelli Place
Cambridge, MA 02138 - 1070
(617) 868-4178

Estimated Technology Readiness Level (TRL) :
Begin: 3
End: 4
Technical Abstract (Limit 2000 characters, approximately 200 words)

An objective for future decadal study missions is to detect exo-Earths using space-based telescopes with segmented primary mirrors (PMs). Wavefront control for such telescopes will require small-stroke, high-precision deformable mirrors (DMs). The proposed innovation is a segmented microelectromechanical DM that can be used in NASA test beds as a surrogate for segmented PMs, or to compensate wavefront errors of PM segments in future NASA programs. The project directly addresses NASA’s SBIR General Solicitation, Focus Area 10: Advanced Telescope Technologies, under the Science Mission Directorate Subtopic S2.01, which calls for a deformable source to simulate the telescope front end of a coronagraph undergoing deformations. In the proposed work, an objective is to develop a DM having an array of hexagonal mirror segments, each supported by an array of underlying electrostatic actuators. Such a device could be used to actively compensate topographical errors in a PM. The proposed device has no hysteresis and uses an all-silicon design that is intrinsically stable and insensitive to environmental distortions. The plan of work builds on a successful Phase I project that demonstrated concept feasibility. It includes fabrication of DM segment arrays, use of an ion beam figuring process to planarize DM mirror surfaces, and demonstration of active control of segment topography. The outcome of this project will be a device that can reduce telescope shape errors to <10nm RMS in NASA test beds used for development of future space-based observatories.

Potential NASA Applications (Limit 1500 characters, approximately 150 words)

Segmented deformable mirrors that are suitable for correcting surface figure error and stability in primary telescope segments and serving as a primary mirror array surrogates in telescope testbeds have a few NASA applications. The following application applies to DMs designed for this program.

Space-based astronomical telescopes: A number of missions require the control provided by the proposed DMs such as LUVOIR and HabEx. These devices will fill a critical technology gap in NASA’s vision for high-contrast imaging and spectroscopy instruments.

Potential Non-NASA Applications (Limit 1500 characters, approximately 150 words)

Deformable mirrors suitable for correcting surface figure error and stability in primary telescope segments and as primary mirror surrogates in telescope testbeds have non-NASA applications. They can improve the performance of terrestrial telescopes such as TMT and E-ELT. Surrogate devices can be used in testbeds to develop instruments for telescopes with segmented primary mirrors.

Duration: 24

Form Generated on 05/13/2019 13:33:18