KEYWORDS: Infrared radiation, Modeling and simulation, Thermography, Temperature metrology, Infrared signatures, Infrared imaging, Prototyping, Thermodynamics, Black bodies, Standards development
Analyzing thermodynamic patterns during product development can easily be characterized by various "Modeling and
Simulation" software programs to observe Emissive Signatures. Baseline temperatures are referenced as an adjusted
"Blackbody" value and used to compare differential temperature changes during dynamometer testing. An infrared
spectrum distinguishes pattern profiles unique to the product for both thermodynamic performance and to accurately
validate test materials. A collaborative CRADA1 effort has been established between the US Army RDECOMTARDEC
and Drive Dynamics LLC of Dallas, TX on the development of an advanced Run Flat Insert System for
military wheeled vehicles. Mapping of measured infrared thermometer values help in locating and determining whether
or not material temperatures are within design limits. Prior testing by the US Army Physical Simulation Team has
established a baseline Emissive Signature for HMMWV wheel assemblies at specific loads and speeds. As advanced
Run Flat Insert Systems are developed for increased load capacities using structurally engineered profiles the Emissive
Signature can be used to compare to baseline wheel assemblies and aid in establishing Run Flat performance and longevity.
The optical beam profile, power transmission efficiency, and tissue effects on the Idaho potato model of 1.064-micrometer Nd:YAG radiation were determined using a fiber with the 3M High-Power Side-Firing Tip. The results suggest that a single mechanically and thermally robust beam-focusing tip may be used for both ablation and coagulation in the treatment of benign prostate hypertrophy.
We have designed and are fabricating the SideFireR laser optical fiber device incorporating a 99.95+% purity gold tip with a mirror which laterally reflects the beam at a 105 degree(s) angle to the optical fiber axis while closely maintaining the beam profile. The monolithic gold construction of the mirrored tip underlies the optical and thermal stability and the bicompatibility of the device during lasing in aqueous environments using up to 80 W of Nd:YAG 1.064 micrometers radiation. Current studies are being conducted to evaluate the use of this device in laser coagulation of the prostate as an alternative treatment to transurethral resection in treatment of benign prostatic hypertrophy.
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