Achromatic Vector Vortex Waveplates for Coronagraphy

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$99,994.00
Award Year:
2011
Program:
SBIR
Phase:
Phase I
Contract:
NNX11CF39P
Award Id:
n/a
Agency Tracking Number:
105626
Solicitation Year:
2010
Solicitation Topic Code:
S2.02
Solicitation Number:
n/a
Small Business Information
FL, Winter Park, FL, 32789-4523
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
959414327
Principal Investigator:
Nelson Tabirian
Principal Investigator
(407) 629-1282
nelson@beamco.com
Business Contact:
Nelson Tabirian
President
(407) 629-1282
nelson@beamco.com
Research Institution:
Stub




Abstract
Diffractive waveplates are optical components made of thin films of anisotropic materials by modulating their optical axis orientation in the plane of the waveplate. The family of diffractive waveplates wherein this modulation is axially symmetricÂ? vector vortex waveplates (VVWs) Â? impart a spiral phase modulation at a light beam propagated through the waveplate. As a result, the intensity of radiation is sharply decreased at the axis of the beam by many orders of magnitude, depending on the topological charge and quality of the VVW. Such transparent phase components can be successfully employed in coronagraphy allowing imaging of exoplanets at diffraction angle limit of their separation from the bright host star using small aperture telescopes, and they will allow increasing the imaging capability of large telescopes. To achievethis potential, VVWs shall possess with negligibly small singularity size (~ 2 micrometer) and be spectrally broadband in a large aperture (~ 25 mm). We propose to prove the feasibility of developing such components based on azobenzene photoalignment materials, liquid crystal polymers, and the optical printing technology that employs linear-to-axial polarization conversion. This feasibility will be proven in the Phase 1 by demonstrating achromatic VVWs in 700-900 nm spectral range and<10 micrometer singulary size.

* information listed above is at the time of submission.

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