Optical glasses of the dense barium flint position

Details Optical glasses of the dense barium flint position Optical glasses of the dense barium flint position

2011-07-12

2011-07-12

Lorengo, Jerry A. (Department: 1731)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C501S078000, C501S079000, C501S063000

Reexamination Certificate

active

07977264

ABSTRACT:
The optical glasses designated to be used in the areas of imaging, sensors, microscopy, medical technology, digital projection, photolithography, laser technology, wafer/chip technology as well as telecommunications, optical communications engineering and optics/illumination in the automotive sector with a refractive index nd of 1.60≦nd≦1.72 and/or an Abbe number vd of 32≦vd≦45 and with a Tg of 567° C. to 640° C., pronounced short flint character, good chemical resistance, excellent resistance to crystallization, good solarization stability and the following composition (in % by weight based on oxides):SiO230-45B2O3 8-12Na2O 8-15CaO0.1-7  ZnO0 ≦ 5ZrO210-20Nb2O512-24Ta2O50 ≦ 9AgO 0 ≦ 5.

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