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Tantalum oxide free optical glass of the system b deep 2 o deep 3 - la deep 2 o deep 3 with the addition of nb deep 2 o deep 5 with a low dispersion v depth d = 45,9 to 33,9 and a relatively high refractive index n depth d = 1,817 to 1,951
Tantalum oxide free optical glass of the system b deep 2 o deep 3 - la deep 2 o deep 3 with the addition of nb deep 2 o deep 5 with a low dispersion v depth d = 45,9 to 33,9 and a relatively high refractive index n depth d = 1,817 to 1,951
