H-F13 by CDGM

Standard Rare Environmentally Friendly

H-F13 by CDGM is a standard optical glass with a rare melt frequency. It transmits from 0.36 to 2.40 µm with an nd of 1.62588 and a Vd of 35.698971. It has medium thermal expansion (CTE of 8.0×10⁻⁶/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: 0.360–2.400 µm
Optical Properties
Refractive Index (nd) 1.62588
Abbe Number (Vd) 35.698971
Dispersion Formula Sellmeier
Wavelength Range 0.365 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{0.14115\,\lambda^2}{\lambda^2 - 0.0576025} + \frac{1.23909\,\lambda^2}{\lambda^2 - 117.259} + \frac{1.432\,\lambda^2}{\lambda^2 - 0.0106819}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.0
TCE 100/300°C (10-6/K) 9.9
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-1.02 \times 10^{-6} + 2(1.53 \times 10^{-8})\,\Delta T + 3(-5.65 \times 10^{-11})\,\Delta T^2 + \frac{7.32 \times 10^{-7} + 2(8.29 \times 10^{-10})\,\Delta T}{\lambda - 0.275}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 2.69
Relative Cost 4.4
Mechanical Properties
Young's Modulus (GPa) 83.54
Poisson's Ratio 0.231
Knoop Hardness (kgf/mm²) 586.0
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
S-TIM1 Ohara 1.625882 35.699614
F1 Schott 1.625882 35.700495
PBM1 Ohara 1.625882 35.700668
E-F1 Hoya 1.62588 35.74
F1 Hoya 1.62588 35.744525
C26-36 Corning 1.625903 35.60701
F1 Sumita 1.62588 35.6
F7 Hoya 1.625363 35.583498
F7 Schott 1.625361 35.561194
F13 Schott 1.622372 36.043399
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
F13 CDGM 1.625884 35.713679
H-F6 CDGM 1.62495 35.585173
F6 CDGM 1.624954 35.577816
H-F5 CDGM 1.62435 35.923444
F5 CDGM 1.624353 35.938411
H-F4 CDGM 1.62005 36.345886
F4 CDGM 1.620047 36.35673
F4GTI CDGM 1.62005 36.430327
F7 CDGM 1.636365 35.386204
F3 CDGM 1.616592 36.627394
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