H-TF3L by CDGM

Preferred Very Common Environmentally Friendly

H-TF3L by CDGM is a preferred optical glass with a very common melt frequency. It transmits from 0.33 to 2.40 µm with an nd of 1.6134 and a Vd of 44.107022. It has low thermal expansion (CTE of 6.3×10⁻⁶/K), excellent chemical resistance, and high 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: 0.330–2.400 µm
Optical Properties
Refractive Index (nd) 1.6134
Abbe Number (Vd) 44.107022
Dispersion Formula Sellmeier
Wavelength Range 0.365 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{1.3561\,\lambda^2}{\lambda^2 - 0.0082337} + \frac{0.192048\,\lambda^2}{\lambda^2 - 0.0410079} + \frac{1.32584\,\lambda^2}{\lambda^2 - 111.799}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.3
TCE 100/300°C (10-6/K) 7.7
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[4.34 \times 10^{-6} + 2(1.58 \times 10^{-8})\,\Delta T + 3(-2.17 \times 10^{-11})\,\Delta T^2 + \frac{6.07 \times 10^{-7} + 2(6.66 \times 10^{-10})\,\Delta T}{\lambda - 0.227}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 2.8
Relative Cost 10.0
Mechanical Properties
Young's Modulus (GPa) 90.7
Poisson's Ratio 0.229
Knoop Hardness (kgf/mm²) 625.0
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
BPM51 Ohara 1.613397 44.266767
S-NBM51 Ohara 1.613397 44.267706
KZFSN4 Schott 1.6134 44.29
ADF40 Hoya 1.6134 44.290061
LAF45 Hoya 1.61396 44.29
KZFS1 Schott 1.613099 44.339473
E-ADF10 Hoya 1.6131 44.36
ADF10 Hoya 1.613102 44.361138
BPM4 Ohara 1.6134 43.841533
C13-44 Corning 1.613394 44.386543
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
TF3 CDGM 1.612423 44.093486
BAF5 CDGM 1.605623 43.890292
H-BAF5 CDGM 1.60562 43.875621
H-BAF6 CDGM 1.60801 46.202418
BAF7 CDGM 1.614131 40.025731
H-BAF7 CDGM 1.61413 39.985319
QF5 CDGM 1.582153 42.039634
BAF4 CDGM 1.582712 46.505886
H-BAF4 CDGM 1.58267 46.597786
H-BAF8 CDGM 1.62604 39.071631
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