K-SKLD200 by Sumita

Preferred Very Common Precision Molding Environmentally Friendly

K-SKLD200 by Sumita is a preferred optical glass with a very common melt frequency. It transmits from 0.27 to 2.00 µm with an nd of 1.5866 and a Vd of 59.0. It has medium thermal expansion (CTE of 7.4×10⁻⁶/K), excellent chemical resistance, and precision molding compatibility.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.36–1.55 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.36–1.55 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.270–2.000 µm
Optical Properties
Refractive Index (nd) 1.5866
Abbe Number (Vd) 59.0
Dispersion Formula Schott
Wavelength Range 0.36 — 1.55 µm
$$n(\lambda) = \sqrt{2.47869 - 0.0109309\,\lambda^2 + 0.0140915\,\lambda^{-2} + 0.000158418\,\lambda^{-4} + 1.12374 \times 10^{-5}\,\lambda^{-6} - 4.97623 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.4
TCE 100/300°C (10-6/K) 8.8
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[5.75 \times 10^{-6} + 2(1.47 \times 10^{-8})\,\Delta T + 3(-2.92 \times 10^{-11})\,\Delta T^2 + \frac{5.6 \times 10^{-7} + 2(7.11 \times 10^{-10})\,\Delta T}{\lambda - 0.138}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 2.7
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance 1
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
L-BAL42P Ohara 1.58593 59.248294
P-SK57Q1 Schott 1.586 59.5
D-ZK2L-25 CDGM 1.58625 59.524868
BAL42 Ohara 1.583126 59.373789
S-BAL42 Ohara 1.583126 59.374673
P-SK57 Schott 1.587 59.6
D-ZK2L CDGM 1.587 59.600321
D-ZK2 CDGM 1.58313 59.381686
L-BAL42 Ohara 1.583126 59.385694
D-ZK2-25 CDGM 1.58241 59.308255
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
K-CSK120(M) Sumita 1.58445 59.2
K-SKLD200(M) Sumita 1.58355 58.8
SK12 Sumita 1.58313 59.3
CSK12 Sumita 1.5865 59.6
K-CSK120 Sumita 1.587 59.6
CSK120 Sumita 1.587 59.6
K-SKLD120(M) Sumita 1.58401 59.5
K-SKLD120 Sumita 1.5868 59.8
K-SKLD100(M) Sumita 1.58773 60.4
K-PSK100(M) Sumita 1.58792 60.6
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