BASF1 by Sumita

Obsolete Very Rare Environmentally Dangerous

BASF1 by Sumita is an obsolete optical glass with a very rare melt frequency. It transmits from 0.33 to 2.00 µm with an nd of 1.62606 and a Vd of 39.1. It has excellent chemical resistance and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.27–2.0 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.27–2.0 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.330–2.000 µm
Optical Properties
Refractive Index (nd) 1.62606
Abbe Number (Vd) 39.1
Dispersion Formula Schott
Wavelength Range 0.27 — 2.0 µm
$$n(\lambda) = \sqrt{2.57842 - 0.00903849\,\lambda^2 + 0.0220667\,\lambda^{-2} + 0.000480071\,\lambda^{-4} + 3.32013 \times 10^{-5}\,\lambda^{-6} + 5.19431 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 9.2
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.64
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance 1
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
BAFD1 Hoya 1.626057 39.085725
H-BAF8 CDGM 1.62604 39.071631
BAM21 Ohara 1.626059 39.215631
BASF1 Schott 1.626061 38.962861
PBM9 Ohara 1.620451 38.119955
F9 Hoya 1.620446 38.090002
F9 Schott 1.620451 38.080601
H-BAF7 CDGM 1.61413 39.985319
BAF7 CDGM 1.614131 40.025731
S-NBM52 Ohara 1.622049 41.079324
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
F9 Sumita 1.62045 38.0
BASF3 Sumita 1.60717 40.2
F4 Sumita 1.61659 36.6
F3 Sumita 1.61293 36.9
F2 Sumita 1.62004 36.3
F5 Sumita 1.60342 38.0
BASF10 Sumita 1.65016 39.3
F1 Sumita 1.62588 35.6
K-BaSF4 Sumita 1.65128 38.3
BASF4 Sumita 1.65128 38.3
Compare Glasses
    Compare Selected