1968/05/01 by C. L. Rathmann, G. H. Mann, G. Mann +1 · 1 citation
Engineering · Physics and Astronomy · Materials Science · #Laser Material Processing Techniques #Adaptive optics and wavefront sensing #Glass properties and applications
paper · doi:10.1364/ao.7.000819
A new modified fused-silica glass whose coefficient of thermal expansion at 20 degrees C is less than 1/25 that of fused silica is described. It should be particularly useful for large, first-surface mirrors and in other applications where extremely low expansion is desirable. Both solid and lightweight telescope mirror blanks can be constructed using fusion techniques. A discussion of a number of physical properties is included.