the refractive index(nd) of h-zf76 is 1.95906 while the abbe number(υd) is 17.47. comparing to the glass in the same series, h-zf76 has the higher refractive index and lower abbe number.
glass name | h-zf72b | h-zf75a | h-zf76 | |
refractive index | nd | 1.92286 | 1.94595 | 1.95906 |
abbe number | υd | 18.9 | 17.98 | 17.47 |
relative partial dispersion | pg,f | 0.6499 | 0.6549 | 0.6566 |
anomalous dispersion | ⊿pg,f | 0.0377 | 0.0412 | 0.042 |
internal transmittance | 460 | 0.954 | 0.946 | 0.936 |
400 | 0.642 | 0.546 | 0.37 | |
internal transmittance | 460 | 0.915 | 0.894 | 0.876 |
400 | 0.41 | 0.298 | 0.137 | |
chemical stability | rc | 1 | 1 | 1 |
ra | 1 | 1 | 1 | |
dw | 1 | 1 | 1 | |
da | 1 | 1 | 1 | |
roh | 1 | 1 | 1 | |
rp | 1 | 1 | 1 | |
density | ρ(g/cm3) | 3.57 | 3.53 | 3.56 |