N-PSK58 by Schott

Obsolete Unknown Environmentally Friendly

N-PSK58 by Schott is an obsolete optical glass. It transmits from 0.28 to 1.97 µm with an nd of 1.56907 and a Vd of 71.205585. It has high thermal expansion (CTE of 13.4×10⁻⁶/K), below average chemical resistance, and high relative cost.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.334–2.235 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.334–2.235 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.280–1.970 µm
Optical Properties
Refractive Index (nd) 1.56907
Abbe Number (Vd) 71.205585
Dispersion Formula Sellmeier
Wavelength Range 0.334 — 2.235 µm
$$n(\lambda) = \sqrt{1 + \frac{1.11245\,\lambda^2}{\lambda^2 - 0.00555905} + \frac{0.316619\,\lambda^2}{\lambda^2 - 0.0172742} + \frac{0.698911\,\lambda^2}{\lambda^2 - 122.611}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 13.4
TCE 100/300°C (10-6/K) 15.1
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) 4.4
Relative Cost 20.42
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance 51
Alkali Resistance 1
Phosphate Resistance 4
Notes

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Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
D-ZPK7-25 CDGM 1.56854 71.235367
GFK70 Sumita 1.56907 71.3
K-GFK70 Sumita 1.56907 71.3
D-ZPK7 CDGM 1.56907 71.304254
H-ZPK7 CDGM 1.56907 71.304254
K-GFK70(M) Sumita 1.56627 71.3
FCD615 Hoya 1.57144 71.61
B58-72 Corning 1.558086 71.998499
FCD500 Hoya 1.55397 71.76
MC-FCD500-20 Hoya 1.55352 71.72
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
ULTRAN30 Schott 1.5483 74.244488
PSK50 Schott 1.557529 67.282893
N-PSK57 Schott 1.5924 68.398667
PK50 Schott 1.52054 69.712402
PSK54 Schott 1.58599 64.599863
PSK52 Schott 1.603101 65.409791
P-PK53 Schott 1.5269 66.22
PK51A Schott 1.528554 76.975515
N-PK51 Schott 1.52855 76.98
N-PSK3 Schott 1.55232 63.46
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