N-BAF52 by Schott

Preferred Unknown Environmentally Friendly

N-BAF52 by Schott is a preferred optical glass. It transmits from 0.36 to 2.50 µm with an nd of 1.60863 and a Vd of 46.6. It has medium thermal expansion (CTE of 6.86×10⁻⁶/K), excellent chemical resistance, and low relative cost.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.365–2.5 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.365–2.5 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.365–2.500 µm
Optical Properties
Refractive Index (nd) 1.60863
Abbe Number (Vd) 46.6
Dispersion Formula Sellmeier
Wavelength Range 0.365 — 2.5 µm
$$n(\lambda) = \sqrt{1 + \frac{1.43903\,\lambda^2}{\lambda^2 - 0.009078} + \frac{0.0967046\,\lambda^2}{\lambda^2 - 0.0508212} + \frac{1.09876\,\lambda^2}{\lambda^2 - 105.692}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.86
TCE 100/300°C (10-6/K) 7.83
Thermal Conductivity (W/mK) 0.96
Heat Capacity (J/gK) 0.68
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.15 \times 10^{-6} + 2(1.27 \times 10^{-8})\,\Delta T + 3(-5.08 \times 10^{-12})\,\Delta T^2 + \frac{5.64 \times 10^{-7} + 2(6.38 \times 10^{-10})\,\Delta T}{\lambda - 0.238}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.045
Relative Cost 1.9
Mechanical Properties
Young's Modulus (GPa) 86.0
Poisson's Ratio 0.24
Knoop Hardness (kgf/mm²) 600.0
Chemical Resistance
Climatic Resistance 1
Stain Resistance 0
Acid Resistance 1
Alkali Resistance 1
Phosphate Resistance 1
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
BAF7 Hoya 1.608013 46.212035
H-BAF6 CDGM 1.60801 46.202418
K-LCV161(M) Sumita 1.61477 45.6
ADF4 Hoya 1.612498 44.873885
K-LCV161 Sumita 1.6182 45.3
E-BAF8 Hoya 1.62374 47.05
BAF8 Hoya 1.623739 47.054197
BAM8 Ohara 1.62374 47.09722
K-BaF8 Sumita 1.62374 47.1
BAF8 Sumita 1.62374 47.1
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
BAF52 Schott 1.608589 46.44241
KZFSN9 Schott 1.598557 46.903842
BAF8 Schott 1.62374 47.000909
N-KZFS4 Schott 1.61336 44.49
N-KZFS4HT Schott 1.61336 44.49
KZFS1 Schott 1.613099 44.339473
KZFSN4 Schott 1.6134 44.29
BAF4 Schott 1.605621 43.929699
N-BAF4 Schott 1.60568 43.72
KZFS6 Schott 1.591965 48.509579
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