H-LAK10 by CDGM

Standard Rare Environmentally Friendly

H-LAK10 by CDGM is a standard optical glass with a rare melt frequency. It transmits from 0.28 to 2.40 µm with an nd of 1.65113 and a Vd of 55.890872. It has medium thermal expansion (CTE of 7.1×10⁻⁶/K), excellent chemical resistance, and moderate relative cost.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.302–2.325 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.302–2.325 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.280–2.400 µm
Optical Properties
Refractive Index (nd) 1.65113
Abbe Number (Vd) 55.890872
Dispersion Formula Sellmeier
Wavelength Range 0.302 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{0.783175\,\lambda^2}{\lambda^2 - 0.00273169} + \frac{0.894315\,\lambda^2}{\lambda^2 - 0.0169034} + \frac{1.13897\,\lambda^2}{\lambda^2 - 111.159}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.1
TCE 100/300°C (10-6/K) 8.4
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-9.18 \times 10^{-7} + 2(1.25 \times 10^{-8})\,\Delta T + 3(-2.28 \times 10^{-11})\,\Delta T^2 + \frac{4.91 \times 10^{-7} + 2(6.43 \times 10^{-10})\,\Delta T}{\lambda - 0.189}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.73
Relative Cost 4.5
Mechanical Properties
Young's Modulus (GPa) 93.09
Poisson's Ratio 0.272
Knoop Hardness (kgf/mm²) 634.0
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
N-LAK22 Schott 1.65113 55.89
LAKN22 Schott 1.65113 55.891754
C51-56 Corning 1.651124 55.895803
K-LaKn5 Sumita 1.65 55.8
LAKN5 Sumita 1.65 55.8
LACL2 Hoya 1.650201 55.737216
LAL54 Ohara 1.650996 56.154774
S-LAL54 Ohara 1.650996 56.163717
S-LAL54Q Ohara 1.651 56.238379
C57-57 Corning 1.657503 57.198059
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
H-ZK11 CDGM 1.63854 55.446553
H-LAK1 CDGM 1.6595 57.34726
H-LAK11 CDGM 1.66461 54.612239
D-LAK70-25 CDGM 1.668 55.295752
D-LAK70 CDGM 1.6691 55.389689
H-LAK50A CDGM 1.6516 58.403057
H-LAK5A CDGM 1.6779 55.51497
D-LAK5-25 CDGM 1.67686 54.805426
D-LAK5 CDGM 1.6779 54.889665
H-ZK10L CDGM 1.6228 56.913492
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