For programs where design, fabrication and test of space flight optics and optical systems typically require the advantage of lightweighting optics, Goodrich has developed lightweighting procedures and tailored the processes to each program. Recent examples of our lightweighting experience include the Panochromatic Remote-Sensing Instrument for Stereo Mapping (PRISM), which employs a 75% light-weighted open back structure as a l/75 optical element. For the Multispectral Thermal Imager Program, we produced a 20-inch diameter, 80% light-weighted mirror with a surface quality of l/40. For both of these programs, all elements of the systems were flexure mounted.

Goodrich has light-weighted mirrors up to 90%. Although the normal range of lightweighting is in the 75-85% range, materials we have weight-optimized include ULE®, Zerodur® and fused silica. All are open back structures, rather than egg crate or closed cell mirrors.

A recently light-weighted mirror includes the Advanced Mirror System Demonstrator.

ULE is a registered trademark of Corning Incorporated.
Zerodur is a registered trademark of Schott Glaswerke Corporation.