P-SK57 by Schott

Preferred Unknown Precision Molding Environmentally Friendly

P-SK57 by Schott is a preferred optical glass. It transmits from 0.32 to 2.50 µm with an nd of 1.587 and a Vd of 59.6. It has medium thermal expansion (CTE of 7.23×10⁻⁶/K), below average chemical resistance, and precision molding compatibility.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.32–2.5 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.32–2.5 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.320–2.500 µm
Optical Properties
Refractive Index (nd) 1.587
Abbe Number (Vd) 59.6
Dispersion Formula Sellmeier
Wavelength Range 0.32 — 2.5 µm
$$n(\lambda) = \sqrt{1 + \frac{1.31053\,\lambda^2}{\lambda^2 - 0.00740877} + \frac{0.169376\,\lambda^2}{\lambda^2 - 0.0254563} + \frac{1.10988\,\lambda^2}{\lambda^2 - 107.751}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.23
TCE 100/300°C (10-6/K) 8.9
Thermal Conductivity (W/mK) 1.01
Heat Capacity (J/gK) 0.76
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[2.6 \times 10^{-6} + 2(9.4 \times 10^{-9})\,\Delta T + 3(-2.3 \times 10^{-11})\,\Delta T^2 + \frac{4.9 \times 10^{-7} + 2(5.96 \times 10^{-10})\,\Delta T}{\lambda - 0.178}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.012
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) 92.66
Poisson's Ratio 0.25
Knoop Hardness (kgf/mm²) 535.0
Chemical Resistance
Climatic Resistance 4
Stain Resistance 3
Acid Resistance 52
Alkali Resistance 2
Phosphate Resistance 3
Notes

suitable for precision molding

Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
CSK120 Sumita 1.587 59.6
K-CSK120 Sumita 1.587 59.6
D-ZK2L CDGM 1.587 59.600321
CSK12 Sumita 1.5865 59.6
D-ZK2L-25 CDGM 1.58625 59.524868
L-BAL43 Ohara 1.585729 59.69698
K-SKLD120 Sumita 1.5868 59.8
L-BAL42P Ohara 1.58593 59.248294
K-SKLD120(M) Sumita 1.58401 59.5
D-ZK2A CDGM 1.58313 59.539751
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
P-SK57Q1 Schott 1.586 59.5
SK12 Schott 1.583131 59.448822
SK13 Schott 1.591809 58.300621
P-SK58A Schott 1.58913 61.15
SK5 Schott 1.58913 61.266803
N-SK5HTi Schott 1.58913 61.27
N-SK5 Schott 1.58913 61.27
SK14 Schott 1.60311 60.596819
N-SK14 Schott 1.60311 60.6
SK7 Schott 1.60729 59.459272
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