LF6HT by Schott

Obsolete Unknown Environmentally Dangerous

LF6HT by Schott is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.56732 and a Vd of 42.847665. It has medium thermal expansion (CTE of 8.5×10⁻⁶/K), good chemical resistance, and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.334–2.325 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.334–2.325 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.334–2.325 µm
Optical Properties
Refractive Index (nd) 1.56732
Abbe Number (Vd) 42.847665
Dispersion Formula Sellmeier
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{1.2526\,\lambda^2}{\lambda^2 - 0.00892382} + \frac{0.151554\,\lambda^2}{\lambda^2 - 0.0437446} + \frac{12.0086\,\lambda^2}{\lambda^2 - 1432.65}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.5
TCE 100/300°C (10-6/K) 9.7
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.11
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 2
Stain Resistance 0
Acid Resistance 1
Alkali Resistance 2
Phosphate Resistance —
Notes

old, High UV Transmission; glass data moved from former "I_LINE" catalog

Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
FL6 Hoya 1.567324 42.843119
E-FL6 Hoya 1.56732 42.84
PBL26Y Ohara 1.567322 42.855569
PBL26 Ohara 1.567322 42.831708
S-TIL26 Ohara 1.567322 42.817076
H-QF56 CDGM 1.56732 42.810117
LF6 Sumita 1.56732 42.8
LF1 Sumita 1.57309 42.7
FL1 Hoya 1.573091 42.586108
PBL21 Ohara 1.573092 42.576094
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
LF8 Schott 1.564435 43.75028
LF7 Schott 1.575011 41.490793
LF5HT Schott 1.581483 40.913786
LF5HTi Schott 1.58144 40.89
TIF3 Schott 1.547649 42.203707
LF5 Schott 1.58144 40.85
N-LF5 Schott 1.58144 40.848909
LF5G15 Schott 1.58397 40.83
LLF7 Schott 1.548831 45.40834
LLF1 Schott 1.54814 45.75
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