The refractive index(nd) of H-BiF200 is 2.00272 while the abbe number(υd) is 19.32. Comparing with the glass with refractive index(nd) over 2.0 such as H-ZLaF95, H-BiF200 has the lower abbe number and higher dn/dt coefficient.
Glass name | H-ZLaF95 | H-ZLaF80A | H-BIF200 | |
Refractive index | nd | 2.0509 | 2.00069 | 2.00272 |
Abbe number | υd | 26.94 | 25.46 | 19.32 |
Relative partial dispersion | Pg,F | 0.6159 | 0.6419 | |
Anomalous dispersion | ⊿Pg,F | 0.0052 | 0.0146 | 0.0304 |
460 | 0.944 | 0.945 | 0.915 | |
420 | 0.854 | 0.857 | 0.675 | |
Internal transmittance | 460 | 0.892 | 0.894 | 0.838 |
420 | 0.729 | 0.735 | 0.456 | |
Relative | d(-60～-40) | 2.9 | 3.3 | 6.4 |
d(-40～-20) | 3.2 | 3.7 | 6.8 | |
d(-20～0) | 3.4 | 3.9 | 7.1 | |
d(0～20) | 3.6 | 4.1 | 7.5 | |
d(20～40) | 3.7 | 4.2 | 7.8 | |
d(40～60) | 3.9 | 4.5 | 8.2 | |
d(60～80) | 4.2 | 4.7 | 8.5 | |
d(80～100) | 4.4 | 4.9 | 8.7 | |
d(100～120) | 4.7 | 5.3 | 9.3 | |
d(120～140) | 5.1 | 5.5 | 9.6 | |
d(140～160) | 5.3 | 5.7 | 9.9 | |
Density | ρ(g/cm3) | 5.27 | 4.76 | 5.1 |
