| 摘要 |
905,889. Optical glass compositions. CARLZEISS-STIFTUNG, [trading as JENA GLASWERK SCHOTT & GEN.]. Feb. 5, 1959 [Feb. 5, 1958], No. 4106/59. Class 56. An optical glass consists of (a) 65-100% by weight of a first component comprising K 2 (TiF 6 ); a metaphosphate of Na and/or K and/or Bi and/or Pb ; and P 2 O 5 with or without the addition of Sb 2 O 3 ; the constituents being in a range of proportions which, when represented graphically on a triangular phase diagram as in Fig. 1, are defined by the consecutive coordinates A (10.2, 72.4, 17.4); B (45.7, 10.0, 43.7); C (47.0, 0, 53.0); D (61.4, 0, 38.6); E (29.8, 70.2, 0); F (9.6, 90.4. 0), joined together rectilinearly (ABCDEFA), the three figures in each series representing the molar percentage of K 2 (TIF 6 ), the metaphosphate and the oxide, respectively, (b) up to 15% by weight of a second component comprising TiO 2 , and (c) up to 20% by weight of a third component comprising oxide of Mg and/or Zn, and/or Ta and/or Nb and/or W and/or Pb and/or Bi. A large number of examples are given.
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