P-SK60 by Schott

Preferred Unknown Precision Molding Environmentally Friendly

P-SK60 by Schott is a preferred optical glass. It transmits from 0.30 to 2.50 µm with an nd of 1.61035 and a Vd of 57.9. It has medium thermal expansion (CTE of 7.06×10⁻⁶/K), below average chemical resistance, and precision molding compatibility.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.3–2.5 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.3–2.5 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.300–2.500 µm
Optical Properties
Refractive Index (nd) 1.61035
Abbe Number (Vd) 57.9
Dispersion Formula Sellmeier
Wavelength Range 0.3 — 2.5 µm
$$n(\lambda) = \sqrt{1 + \frac{1.4079\,\lambda^2}{\lambda^2 - 0.00784382} + \frac{0.143381\,\lambda^2}{\lambda^2 - 0.0287769} + \frac{1.16514\,\lambda^2}{\lambda^2 - 105.373}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.06
TCE 100/300°C (10-6/K) 8.85
Thermal Conductivity (W/mK) 1.13
Heat Capacity (J/gK) 0.76
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[2.41 \times 10^{-6} + 2(9.52 \times 10^{-9})\,\Delta T + 3(-8.08 \times 10^{-12})\,\Delta T^2 + \frac{4.72 \times 10^{-7} + 2(6.22 \times 10^{-10})\,\Delta T}{\lambda - 0.193}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.075
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) 98.79
Poisson's Ratio 0.25
Knoop Hardness (kgf/mm²) 601.0
Chemical Resistance
Climatic Resistance 3
Stain Resistance 5
Acid Resistance 53
Alkali Resistance 2
Phosphate Resistance 3
Notes

suitable for precision molding

Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
K-VC79 Sumita 1.61035 57.9
VC79 Sumita 1.6097 57.8
D-ZK79 CDGM 1.60886 57.895896
D-ZK79-25 CDGM 1.60809 57.820851
C13-58 Corning 1.612693 58.570371
H-ZK6 CDGM 1.61272 58.577083
BACD4 Hoya 1.61272 58.58
K-SK4 Sumita 1.61272 58.6
SK4 Sumita 1.61272 58.6
K-VC79(M) Sumita 1.60737 57.2
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
SK4 Schott 1.61272 58.629829
N-SK4 Schott 1.61272 58.63
SK3 Schott 1.60881 58.921505
SK1 Schott 1.61025 56.712386
SK2 Schott 1.607381 56.650108
N-SK2HT Schott 1.60738 56.65
N-SK2 Schott 1.60738 56.65
SK6 Schott 1.61375 56.397311
SK7 Schott 1.60729 59.459272
N-SK15 Schott 1.62296 58.02
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