LLF6HT by Schott

Obsolete Unknown Environmentally Dangerous

LLF6HT by Schott is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.531739 and a Vd of 48.974492. It has medium thermal expansion (CTE of 7.5×10⁻⁶/K), excellent 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) 1.531739
Abbe Number (Vd) 48.974492
Dispersion Formula Sellmeier
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{1.20073\,\lambda^2}{\lambda^2 - 0.00848879} + \frac{0.103855\,\lambda^2}{\lambda^2 - 0.0416237} + \frac{0.876958\,\lambda^2}{\lambda^2 - 105.783}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.5
TCE 100/300°C (10-6/K) 8.5
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) 2.81
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance 0
Acid Resistance 1
Alkali Resistance 1
Phosphate Resistance 1
Notes

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

Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
PBL6Y Ohara 1.531717 48.956017
PBL6 Ohara 1.531717 48.904553
LLF6 Sumita 1.53172 48.9
S-TIL6 Ohara 1.531717 48.840718
E-FEL6 Hoya 1.53172 48.84
H-QF6A CDGM 1.53172 48.839833
FEL6 Hoya 1.53172 48.837531
QF6 CDGM 1.531719 48.755584
PBL2 Ohara 1.54072 47.23368
H-QF8 CDGM 1.54072 47.230007
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
N-LLF6 Schott 1.531688 48.895238
LLF6 Schott 1.531719 48.762595
LLF2 Schott 1.540719 47.171344
KZFN2 Schott 1.52944 51.626811
KZFN1 Schott 1.551149 49.637723
KF9 Schott 1.523412 51.492996
N-KF9 Schott 1.52346 51.54
KF6 Schott 1.517421 52.200088
LLF1HTi Schott 1.54815 45.9
LLF1HT Schott 1.548144 45.888593
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