N-KZFS11 by Schott

Preferred Unknown Precision Molding Environmentally Friendly

N-KZFS11 by Schott is a preferred optical glass. It transmits from 0.31 to 2.50 µm with an nd of 1.63775 and a Vd of 42.41. It has medium thermal expansion (CTE of 6.56×10⁻⁶/K), good chemical resistance, high relative cost, and precision molding compatibility.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.31–2.5 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.31–2.5 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.310–2.500 µm
Optical Properties
Refractive Index (nd) 1.63775
Abbe Number (Vd) 42.41
Dispersion Formula Sellmeier
Wavelength Range 0.31 — 2.5 µm
$$n(\lambda) = \sqrt{1 + \frac{1.33222\,\lambda^2}{\lambda^2 - 0.00840298} + \frac{0.289242\,\lambda^2}{\lambda^2 - 0.034424} + \frac{1.15162\,\lambda^2}{\lambda^2 - 88.4311}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.56
TCE 100/300°C (10-6/K) 7.56
Thermal Conductivity (W/mK) 0.81
Heat Capacity (J/gK) 0.69
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[3.34 \times 10^{-6} + 2(1.16 \times 10^{-8})\,\Delta T + 3(-1.8 \times 10^{-11})\,\Delta T^2 + \frac{6.32 \times 10^{-7} + 2(7.21 \times 10^{-10})\,\Delta T}{\lambda - 0.206}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.196
Relative Cost 18.7
Mechanical Properties
Young's Modulus (GPa) 79.0
Poisson's Ratio 0.25
Knoop Hardness (kgf/mm²) 530.0
Chemical Resistance
Climatic Resistance 1
Stain Resistance 1
Acid Resistance 3
Alkali Resistance 1
Phosphate Resistance 1
Notes

suitable for precision molding. step 0.5 available

Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
C38-42 Corning 1.637752 42.433862
BPH35 Ohara 1.644496 40.817749
ADF355 Hoya 1.6445 40.762285
S-BAM12 Ohara 1.6393 44.872804
BAM12 Ohara 1.6393 44.878032
S-NBM52 Ohara 1.622049 41.079324
BAF12 Sumita 1.6393 45.0
BAF12 Hoya 1.639302 45.070071
ATF4 Hoya 1.653757 44.723072
BAF23 Hoya 1.652238 44.922169
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
BASF57 Schott 1.651474 41.901823
BAF51 Schott 1.652242 44.930457
N-BAF51 Schott 1.65224 44.96
N-KZFS5 Schott 1.65412 39.7
KZFSN5 Schott 1.65412 39.63
BASF10 Schott 1.65016 39.148818
BASF1 Schott 1.626061 38.962861
KZFSN4 Schott 1.6134 44.29
KZFS1 Schott 1.613099 44.339473
N-KZFS4 Schott 1.61336 44.49
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