PSK50 by Schott

Obsolete Unknown Environmentally Dangerous

PSK50 by Schott is an obsolete optical glass. It transmits from 0.35 to 0.86 µm with an nd of 1.557529 and a Vd of 67.282893. It has medium thermal expansion (CTE of 8.6×10⁻⁶/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: 0.350–0.860 µm
Optical Properties
Refractive Index (nd) 1.557529
Abbe Number (Vd) 67.282893
Dispersion Formula Sellmeier
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{1.32203\,\lambda^2}{\lambda^2 - 0.00727865} + \frac{0.0723081\,\lambda^2}{\lambda^2 - 0.0279922} + \frac{0.867\,\lambda^2}{\lambda^2 - 91.0643}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.6
TCE 100/300°C (10-6/K) 9.9
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-5.28 \times 10^{-6} + 2(4.39 \times 10^{-9})\,\Delta T + 3(8.73 \times 10^{-11})\,\Delta T^2 + \frac{4.19 \times 10^{-7} + 2(1.05 \times 10^{-9})\,\Delta T}{\lambda - 0.145}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 2.93
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
B52-67 Corning 1.552198 67.059229
K-PMK155(M) Sumita 1.55471 68.0
K-PMK155 Sumita 1.5582 68.2
QUARTZ-E Generic Birefringent 1.553398 68.797763
QUARTZ Generic Birefringent 1.544296 70.132045
S-FPM5 Ohara 1.552 70.697068
PCD3 Hoya 1.55232 63.424095
H-BAK4 CDGM 1.55248 63.36549
K-GFK70(M) Sumita 1.56627 71.3
D-ZPK7-25 CDGM 1.56854 71.235367
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
N-PSK3 Schott 1.55232 63.46
PSK3 Schott 1.552322 63.456253
N-PSK58 Schott 1.56907 71.205585
P-PK53 Schott 1.5269 66.22
PSK2 Schott 1.56873 63.083014
PSK54 Schott 1.58599 64.599863
N-PSK57 Schott 1.5924 68.398667
PK3 Schott 1.525419 64.662422
PK50 Schott 1.52054 69.712402
PK2 Schott 1.518211 65.054286
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