K-SKLD300(M) by Sumita

Standard Rare Environmentally Friendly

K-SKLD300(M) by Sumita is a standard optical glass with a rare melt frequency. It transmits from 0.29 to 2.00 µm with an nd of 1.56124 and a Vd of 60.1. It has low thermal expansion (CTE of 5.8×10⁻⁶/K) and excellent chemical resistance.

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: 0.290–2.000 µm
Optical Properties
Refractive Index (nd) 1.56124
Abbe Number (Vd) 60.1
Dispersion Formula Schott
Wavelength Range 0.36 — 1.55 µm
$$n(\lambda) = \sqrt{2.40234 - 0.0108083\,\lambda^2 + 0.0127789\,\lambda^{-2} + 0.000237061\,\lambda^{-4} - 7.40758 \times 10^{-6}\,\lambda^{-6} + 6.08036 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 5.8
TCE 100/300°C (10-6/K) 7.2
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[7.82 \times 10^{-6} + 2(1.14 \times 10^{-8})\,\Delta T + 3(-7.72 \times 10^{-11})\,\Delta T^2 + \frac{4.72 \times 10^{-7} + 2(8.91 \times 10^{-10})\,\Delta T}{\lambda - 0.181}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 2.6
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
S-BAL41 Ohara 1.563839 60.666575
BAL41 Ohara 1.563839 60.695914
H-BAK6 CDGM 1.56388 60.764747
SK11 Schott 1.56384 60.798869
N-SK11 Schott 1.56384 60.8
BACD11 Hoya 1.56384 60.83
L-PHL1 Ohara 1.56455 60.818065
B64-61 Corning 1.564005 60.964853
BAL50 Ohara 1.559625 61.172671
S-BAL50 Ohara 1.559625 61.172671
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
K-SKLD300 Sumita 1.5642 60.4
SK11 Sumita 1.56384 60.8
K-PSK11(M) Sumita 1.55985 61.0
K-PSK11 Sumita 1.5658 61.0
P-SK11 Sumita 1.5658 61.0
SK20 Sumita 1.55963 61.2
BAK2 Sumita 1.53996 59.7
BAK1 Sumita 1.5725 57.5
SK12 Sumita 1.58313 59.3
K-SKLD120(M) Sumita 1.58401 59.5
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