T&E Programs

Holographic Target Board for Ground Target Irradiance/Fluence Measurement

Technical Approach

• Photo-thermo-refractive glass can record a hologram of an object under UV illumination
• Hologram is “developed” in a furnace at 400 C
  Hologram stable up to development temperature
• Program will develop small-aperture diffusers as a risk reduction measure
• Full-scale diffusers will be developed once techniques have been refined with the small diffusers
• Development is guided by requirements determined from discussions with labs and test ranges

Program Highlights

• The holographic target board will provide a reusable target for beam irradiance profile measurement
• The target boards will be rugged and will be consistent from board to board

System Requirements and Capabilities

• Create a diffusely-scattering target board based on a hologram created in low-absorption photo-thermo-refractive glass
• Document the requirements for the target board
• Develop 2” square holographic diffusers
  - Risk reduction
• Develop 20” square holographic target boards for HEL system tests

For More Information, contact:

David Roberts
Electro-Optical Systems Laboratory
Phone: 404-407-6493
Email: david.roberts@gtri.gatech.edu

Last Updated December 20, 2007

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