The Mariner Jupiter Saturn (Voyager) mission is a scaled down version of the tour of the Outer Planets mission. The spacecraft uses RTGs rather than solar panels for power generation, and the RTGs and radiation environment of Jupiter generates a requirement that the optical systems be designed and fabricated out of radiation stabilized optical materials. The narrow angle optical system is similar the one used on Mariner 10, but the wide angle system was designed for this spacecraft utilizing the cerium dcped glasses having the greatest blue transmittance.
Leonard Larks, Leonard Larks,
"Visual Imaging Optical Systems Of The Mariner To Jupiter And Saturn Spacecraft", Proc. SPIE 0172, Instrumentation in Astronomy III, (3 May 1979); doi: 10.1117/12.957105; https://doi.org/10.1117/12.957105