D-LAK6 by CDGM

Preferred Common Precision Molding Environmentally Friendly

D-LAK6 by CDGM is a preferred optical glass with a common melt frequency. It transmits from 0.30 to 2.40 µm with an nd of 1.69384 and a Vd of 53.128245. It has medium thermal expansion (CTE of 7.5×10⁻⁶/K), excellent chemical resistance, moderate relative cost, and precision molding compatibility.

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: 0.300–2.400 µm
Optical Properties
Refractive Index (nd) 1.69384
Abbe Number (Vd) 53.128245
Dispersion Formula Sellmeier
Wavelength Range 0.302 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{0.477723\,\lambda^2}{\lambda^2 - 0.0226962} + \frac{1.33623\,\lambda^2}{\lambda^2 - 0.00659605} + \frac{1.22543\,\lambda^2}{\lambda^2 - 94.2028}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.5
TCE 100/300°C (10-6/K) 9.5
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.33 \times 10^{-6} + 2(1.27 \times 10^{-8})\,\Delta T + 3(-2.36 \times 10^{-11})\,\Delta T^2 + \frac{5.62 \times 10^{-7} + 2(7.08 \times 10^{-10})\,\Delta T}{\lambda - 0.199}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.5
Relative Cost 6.9
Mechanical Properties
Young's Modulus (GPa) 113.69
Poisson's Ratio 0.279
Knoop Hardness (kgf/mm²) 665.0
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Notes

anneal rate:4℃/h

Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
K-VC80 Sumita 1.69384 53.1
L-LAL13 Ohara 1.6935 53.185799
M-LAC130 Hoya 1.6935 53.2
P-LAK35 Schott 1.6935 53.2
MC-LAC130 Hoya 1.6935 53.2
MP-LAC130 Hoya 1.6935 53.2
S-LAL13 Ohara 1.693501 53.205327
LAL13 Ohara 1.693501 53.231566
LAKN13 Schott 1.693501 53.330054
LAC13 Hoya 1.6935 53.34
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
D-LAK6-25 CDGM 1.69281 53.049215
H-LAK6A CDGM 1.6935 53.380441
H-LAK2A CDGM 1.69211 54.539198
H-LAK71 CDGM 1.703 52.406734
H-LAK59A CDGM 1.691 54.815309
H-LAK51A CDGM 1.6968 55.526357
H-LAK7A CDGM 1.713 53.832974
D-LAK5 CDGM 1.6779 54.889665
D-LAK5-25 CDGM 1.67686 54.805426
H-LAK72 CDGM 1.713 51.80665
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