KZFS7A by Schott

Obsolete Unknown Environmentally Dangerous

KZFS7A by Schott is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.68064 and a Vd of 37.389991. It has low thermal expansion (CTE of 4.9×10⁻⁶/K) and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.334–2.325 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.334–2.325 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.334–2.325 µm
Optical Properties
Refractive Index (nd) 1.68064
Abbe Number (Vd) 37.389991
Dispersion Formula Sellmeier
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{1.53916\,\lambda^2}{\lambda^2 - 0.0102662} + \frac{0.209619\,\lambda^2}{\lambda^2 - 0.0471105} + \frac{0.936171\,\lambda^2}{\lambda^2 - 71.6979}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 4.9
TCE 100/300°C (10-6/K) 5.9
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[6.24 \times 10^{-6} + 2(1.37 \times 10^{-8})\,\Delta T + 3(-3.58 \times 10^{-11})\,\Delta T^2 + \frac{7.02 \times 10^{-7} + 2(7.76 \times 10^{-10})\,\Delta T}{\lambda - 0.241}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.73
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Notes

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Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
ADF405 Hoya 1.6765 37.477902
BPH40 Ohara 1.676498 37.537388
S-NBH52 Ohara 1.672999 38.14817
S-NBH52V Ohara 1.673 38.256077
C97-36 Corning 1.695989 36.517325
BASF12 Sumita 1.66998 39.2
S-BAH32 Ohara 1.669979 39.271035
BAH32 Ohara 1.669979 39.279752
BASF2 Sumita 1.66446 35.9
BAFD2 Hoya 1.664457 35.887705
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
BASF12 Schott 1.669979 39.200523
KZFS12 Schott 1.696 36.29
BASF13 Schott 1.69761 38.570097
N-BASF2 Schott 1.66446 36.0
BASF2 Schott 1.66446 35.829357
BASF56 Schott 1.657149 36.735021
N-BASF64 Schott 1.704 39.38
BASF64A Schott 1.704 39.384429
KZFSN5 Schott 1.65412 39.63
N-KZFS5 Schott 1.65412 39.7
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