H-F2 by CDGM

Preferred Medium Environmentally Friendly

H-F2 by CDGM is a preferred optical glass with a medium melt frequency. It transmits from 0.36 to 2.40 µm with an nd of 1.61293 and a Vd of 37.004441. It has medium thermal expansion (CTE of 7.8×10⁻⁶/K), excellent chemical resistance, and low 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: 0.360–2.400 µm
Optical Properties
Refractive Index (nd) 1.61293
Abbe Number (Vd) 37.004441
Dispersion Formula Sellmeier
Wavelength Range 0.365 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{1.40478\,\lambda^2}{\lambda^2 - 0.0104153} + \frac{1.17496\,\lambda^2}{\lambda^2 - 113.689} + \frac{0.130831\,\lambda^2}{\lambda^2 - 0.0568962}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.8
TCE 100/300°C (10-6/K) 9.4
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[5.89 \times 10^{-7} + 2(1.15 \times 10^{-8})\,\Delta T + 3(-3.15 \times 10^{-11})\,\Delta T^2 + \frac{6.95 \times 10^{-7} + 2(2.04 \times 10^{-9})\,\Delta T}{\lambda - 0.271}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 2.65
Relative Cost 2.7
Mechanical Properties
Young's Modulus (GPa) 81.25
Poisson's Ratio 0.217
Knoop Hardness (kgf/mm²) 563.0
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
S-TIM3 Ohara 1.612929 37.005342
PBM3 Ohara 1.612929 36.994096
F3 Schott 1.612931 37.038954
F3 Hoya 1.612929 36.964515
E-F3 Hoya 1.61293 36.96
F3 Sumita 1.61293 36.9
PBM4 Ohara 1.616588 36.632973
F4 Schott 1.616592 36.628072
F4 Hoya 1.616589 36.615561
F4 Sumita 1.61659 36.6
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
F2 CDGM 1.612929 36.986002
H-F3 CDGM 1.61659 36.651688
F3 CDGM 1.616592 36.627394
F4GTI CDGM 1.62005 36.430327
F4 CDGM 1.620047 36.35673
H-F4 CDGM 1.62005 36.345886
H-F1 CDGM 1.60342 38.010877
F1 CDGM 1.603417 38.01487
F5 CDGM 1.624353 35.938411
H-F5 CDGM 1.62435 35.923444
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