Potential NASA Commercial Applications: The primary application associated with this program is to provide easy imaging access to operating jet engine turbines for research and development purposes. Thermal imaging of jet turbine and combustor operation is critically important to engine development and operation. Temperature distribution, hot spot location, and thermal barrier coating performance can be monitored. Imaging will also detect operating geometry such as tip clearance, blade position, and blade spacing. Combustor operation/degradation can also be diagnosed. These are all important engine lifetime indicators. Availability of a very small diameter, easily installed imaging endoscope would enable diagnosis of a wide variety of high temperature, harsh environment NASA test facilities and research projects.