H-LAF10LA by CDGM

Preferred Very Common Environmentally Friendly

H-LAF10LA by CDGM is a preferred optical glass with a very common melt frequency. It transmits from 0.31 to 2.40 µm with an nd of 1.788 and a Vd of 47.491731. It has low thermal expansion (CTE of 6.1×10⁻⁶/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: 0.310–2.400 µm
Optical Properties
Refractive Index (nd) 1.788
Abbe Number (Vd) 47.491731
Dispersion Formula Sellmeier
Wavelength Range 0.302 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{1.93178\,\lambda^2}{\lambda^2 - 0.00997341} + \frac{0.189897\,\lambda^2}{\lambda^2 - 0.0368891} + \frac{1.09737\,\lambda^2}{\lambda^2 - 77.2777}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.1
TCE 100/300°C (10-6/K) 7.7
Thermal Conductivity (W/mK) 0.683
Heat Capacity (J/gK) 0.459
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.87 \times 10^{-6} + 2(1.68 \times 10^{-8})\,\Delta T + 3(-3.95 \times 10^{-11})\,\Delta T^2 + \frac{5.95 \times 10^{-7} + 2(4.28 \times 10^{-10})\,\Delta T}{\lambda - 0.194}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.3
Relative Cost 4.5
Mechanical Properties
Young's Modulus (GPa) 123.98
Poisson's Ratio 0.295
Knoop Hardness (kgf/mm²) 652.0
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
TAF4 Hoya 1.788 47.49
N-LAF21 Schott 1.788 47.49
LAFN21 Schott 1.788309 47.470398
D88-47 Corning 1.788001 47.412327
K-LaSFn16 Sumita 1.7883 47.4
LASFN16 Sumita 1.7883 47.4
LAH64 Ohara 1.788001 47.385275
S-LAH64 Ohara 1.788001 47.368522
TAF48 Hoya 1.79091 48.09
MP-TAF401 Hoya 1.77377 47.17
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
H-ZLAF2A CDGM 1.80279 46.761307
H-ZLAF50D CDGM 1.804 46.575016
H-ZLAF50E CDGM 1.804 46.574487
D-ZLAF50-25 CDGM 1.80225 45.452746
D-LAF50 CDGM 1.774 49.590362
D-LAF50-25 CDGM 1.77288 49.519338
D-ZLAF50 CDGM 1.80337 45.491557
H-LAF50B CDGM 1.7725 49.598996
D-LAF050 CDGM 1.76842 49.28216
D-LAF050-25 CDGM 1.76709 49.197491
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