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Photonic Sensing and Laser-based Devices Enabled by OspreyCE Alloys
Keywords: Low expansion alloy, Laser range finders, Laser mounts
The Osprey CE Alloys are a family of light-weight metallic alloys composed of silicon and aluminium. The coefficient of thermal expansion (CTE) can be controlled to a chosen value between 5 and 20 ppm/°C, simply by adjusting the alloy composition. The combination of aluminium and silicon endows these alloys with a unique combination of properties; low density; high thermal conductivity; high specific modulus and excellent transient thermal stability combined with ease of machining, plating and welding. The advantageous physical properties and manufacturing characteristics of these alloys have been utilised in a variety of electronic applications from hermetic power supply packages in down well drilling systems to airborne phased array radar systems. It is, however, the ability to tailor the CTE values to match any ceramic or crystal (> 5 ppm/°C ) that has led to the more recent use of CE alloys in several optical and laser applications. This paper will discuss the use of CE alloys in optical, sensor and laser related applications will be presented and discussed. These include lightweight support structures in small system Nd: YAG laser rangefinders; large X-ray detector carriers and cold plate materials in high power laser applications; and airborne laser mounting brackets.
Dr. Andrew Ogilvy, Marketing and Development Manager
Sandvik Osprey
Neath, West Glam SA11 1NJ ,

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