NASA SBIR 01-1 Solicitation

FORM 9B - PROPOSAL SUMMARY


PROPOSAL NUMBER: E2.01-8786 (For NASA Use Only - Chron: 013213 )
PROPOSAL TITLE:
Single Crystal Piezoelectric Actuators for Membrane Optics

TECHNICAL ABSTRACT (LIMIT 200 WORDS)
Single crystal relaxor piezoelectrics based on Pb(Mg1/3Nb2/3)1-xTixO3 will be investigated for use as actuator plates with an interdigitated electrode pattern providing nearly ?33? mode actuation in the direction of the plate?s longest dimension and as ?31? mode devices driven without electrical connections using an electron beam. Given the large strains (>0.5%), low hysteresis, and good cryogenic performance of single crystal relaxors, the lightweight actuator designs proposed are expected to be ideal candidates for active control of membrane optical systems. Potential adaptive optics designs include edge controlled mirrors with interdigitated electrode actuators located between the reflective membrane and the mirror frame and integrated mirrors consisting of ?31? mode crystal plates bonded to a membrane mirror and driven without direct voltage contacts using an electron beam. Strain amplification through use of bending mode actuators (bimorphs and unimorphs) will also be investigated. By the conclusion of the Phase I program the feasibility of lightweight crystal actuators for adaptive optics will be demonstrated with direct strain measurements from 300 to 20K. Actuator and optics product development will take place in Phase II.

POTENTIAL COMMERCIAL APPLICATIONS
Commercial application for crystal actuator plates with interdigitated electrodes patterns include low profile actuators for active vibration control and structural morphing; large stroke, high resolution positioners for bio-medical micromanipulators; and, in scaled-down versions, actuator arrays for optical switching. Bending mode crystal actuators could be used for similar applications in addition to flipperons for active active flow control, auditory transducers for implantable hearing aids, and high precision, low voltage position for computer disk drive read-write heads.

NAME AND ADDRESS OF PRINCIPAL INVESTIGATOR (Name, Organization Name, Mail Address, City/State/Zip)
Ming-Jen Pan
TRS Ceramics, Inc.
2820 East College Avenue
State College , PA   16801 - 7548

NAME AND ADDRESS OF OFFEROR (Firm Name, Mail Address, City/State/Zip)
TRS Ceramics, Inc.
2820 East College Avenue
State College , PA   16801 - 7548


Form Printed on 06-19-01 15:44