H-ZLAF66 by CDGM

Preferred Common Environmentally Friendly

H-ZLAF66 by CDGM is a preferred optical glass with a common melt frequency. It transmits from 0.35 to 2.40 µm with an nd of 1.801 and a Vd of 34.966919. It has medium thermal expansion (CTE of 7.9×10⁻⁶/K), excellent chemical resistance, and moderate relative cost.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.365–2.325 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.365–2.325 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.350–2.400 µm
Optical Properties
Refractive Index (nd) 1.801
Abbe Number (Vd) 34.966919
Dispersion Formula Sellmeier
Wavelength Range 0.365 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{0.233019\,\lambda^2}{\lambda^2 - 0.0537435} + \frac{1.9066\,\lambda^2}{\lambda^2 - 0.0114337} + \frac{1.37147\,\lambda^2}{\lambda^2 - 110.631}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.9
TCE 100/300°C (10-6/K) 9.3
Thermal Conductivity (W/mK) 0.746
Heat Capacity (J/gK) 0.516
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-1.89 \times 10^{-6} + 2(1.64 \times 10^{-8})\,\Delta T + 3(-1.41 \times 10^{-10})\,\Delta T^2 + \frac{8.7 \times 10^{-7} + 2(1.01 \times 10^{-9})\,\Delta T}{\lambda - 0.245}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.89
Relative Cost 4.9
Mechanical Properties
Young's Modulus (GPa) 109.8
Poisson's Ratio 0.286
Knoop Hardness (kgf/mm²) 596.0
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
S-LAM66 Ohara 1.800999 34.967403
LAM66 Ohara 1.800999 34.965762
N-LASF45HT Schott 1.80107 34.97
N-LASF45 Schott 1.80107 34.97
LASF36A Schott 1.797117 35.080117
LASF33 Schott 1.805958 34.242133
NBFD8 Hoya 1.807401 35.542096
NBFD15-W Hoya 1.8061 33.27
NBFD15 Hoya 1.8061 33.27
S-LAM73 Ohara 1.7936 37.08945
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
H-ZLAF66GT CDGM 1.801 34.966919
H-ZLAF56B CDGM 1.8061 33.268324
H-LAF7 CDGM 1.78179 37.092107
H-ZLAF51 CDGM 1.8045 39.635248
H-ZLAF53BGT CDGM 1.834 37.210555
H-ZLAF53B CDGM 1.834 37.210555
H-ZLAF52 CDGM 1.806099 40.945389
D-ZLAF81-25 CDGM 1.80757 40.97334
H-ZLAF52A CDGM 1.8061 41.016887
D-ZLAF52LA-25 CDGM 1.80882 40.970313
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