A radial gradient-index (r-GRIN) material with low distributed dispersion (T₁₀ equals 0.003, V₁₀ equals 340) was successfully prepared by sol-gel process in SiO₂-TiO₂BaO-K₂O system. The r-GRIN lens with flat surfaces performed little chromatic aberration. Sol-gel synthesis process using metal salts to realize the r-GRIN materials with low distributed dispersion was investigated. The low distributed dispersion was achieved by convex distribution for barium and even distribution for titanium against silicon along a diameter. The sol-gel process enables to prepare r- GRIN materials which have necessary low distributed dispersion on demand.

Date Published: 2 October 1997
PDF: 9 pages
Proc. SPIE 3136, Sol-Gel Optics IV, (2 October 1997);

Published in SPIE Proceedings Vol. 3136:
Sol-Gel Optics IV
Bruce S. Dunn; John D. Mackenzie; Edward J. A. Pope; Helmut K. Schmidt; Masayuki Yamane, Editor(s)