PSK2 by Sumita

Obsolete Very Rare Environmentally Dangerous

PSK2 by Sumita is an obsolete optical glass with a very rare melt frequency. It transmits from 0.27 to 2.00 µm with an nd of 1.56873 and a Vd of 63.1. It has average chemical resistance and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.27–2.0 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.27–2.0 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.270–2.000 µm
Optical Properties
Refractive Index (nd) 1.56873
Abbe Number (Vd) 63.1
Dispersion Formula Schott
Wavelength Range 0.27 — 2.0 µm
$$n(\lambda) = \sqrt{2.42714 - 0.0109381\,\lambda^2 + 0.0123363\,\lambda^{-2} + 0.000234459\,\lambda^{-4} - 7.95272 \times 10^{-6}\,\lambda^{-6} + 5.94371 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 7.5
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) 3.06
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 2
Stain Resistance —
Acid Resistance 4
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
S-BAL22 Ohara 1.568729 63.10486
PCD2 Hoya 1.56873 63.105028
PSK2 Schott 1.56873 63.083014
BAL22 Ohara 1.568729 63.162358
H-ZK1 CDGM 1.56888 62.95699
L-PHL2 Ohara 1.5588 62.558541
H-BAK4 CDGM 1.55248 63.36549
B64-61 Corning 1.564005 60.964853
PCD3 Hoya 1.55232 63.424095
PSK3 Schott 1.552322 63.456253
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
P-SK11 Sumita 1.5658 61.0
K-PSK11 Sumita 1.5658 61.0
SK20 Sumita 1.55963 61.2
SK11 Sumita 1.56384 60.8
K-PSK11(M) Sumita 1.55985 61.0
K-SKLD300 Sumita 1.5642 60.4
P-SK60 Sumita 1.59087 62.3
K-SKLD5(M) Sumita 1.58606 61.0
K-SKLD300(M) Sumita 1.56124 60.1
SK5 Sumita 1.58913 61.2
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