Differential Focus Optical Blade Tip Clearance Probe

Period of Performance: 09/05/2008 - 09/05/2010


Phase 2 SBIR

Recipient Firm

Prime Photonics, LLC
1116 South Main Street Array
Blacksburg, VA 24060
Principal Investigator


Prime Research, LC, in proposes to transition the newly developed photonic blade tip clearance sensor from a low temperature prototype to a full system which can operate at temperatures in excess of 2500 degrees Fahrenheit. This project will fill a dramatic shortfall in the current measurement capabilities for turbine engines. Existing blade tip clearance measurements are generally limited to much lower temperature operation. The small and robust single crystal sapphire transducer is optically excited by a remotely located interrogation system. Using the differential response of a dual channel system the radial blade tip location is ascertained through two separate phenomena.