QF1 by CDGM

Obsolete Rare Environmentally Dangerous

QF1 by CDGM is an obsolete optical glass with a rare melt frequency. It transmits from 0.31 to 2.40 µm with an nd of 1.5481 and a Vd of 45.886233. It has medium thermal expansion (CTE of 7.7×10⁻⁶/K), moderate relative cost, and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.365–0.7065 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.365–0.7065 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.310–2.400 µm
Optical Properties
Refractive Index (nd) 1.5481
Abbe Number (Vd) 45.886233
Dispersion Formula Schott
Wavelength Range 0.365 — 0.7065 µm
$$n(\lambda) = \sqrt{2.3505 - 0.0086857\,\lambda^2 + 0.0160929\,\lambda^{-2} + 0.000187059\,\lambda^{-4} + 4.21496 \times 10^{-5}\,\lambda^{-6} - 1.32161 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.7
TCE 100/300°C (10-6/K) 9.3
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) 2.94
Relative Cost 4.7
Mechanical Properties
Young's Modulus (GPa) 61.12
Poisson's Ratio 0.208
Knoop Hardness (kgf/mm²) 342.0
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
LLF1HT Schott 1.548144 45.888593
LLF1 Sumita 1.54814 45.9
LLF1HTi Schott 1.54815 45.9
N-LLF1 Schott 1.54814 45.851572
FEL1 Hoya 1.548136 45.822169
E-FEL1 Hoya 1.54814 45.82
S-TIL1 Ohara 1.548141 45.784277
PBL1 Ohara 1.548141 45.781144
LLF1 Schott 1.54814 45.75
PBL1Y Ohara 1.548141 45.733282
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
H-QF1 CDGM 1.54814 45.820011
QF8 CDGM 1.540718 47.198243
H-QF8 CDGM 1.54072 47.230007
QF70GFI CDGM 1.547 48.161896
QF6 CDGM 1.531719 48.755584
H-QF6A CDGM 1.53172 48.839833
H-QF56 CDGM 1.56732 42.810117
BAF2 CDGM 1.569703 49.435926
H-BAF2 CDGM 1.5697 49.452646
BAF4 CDGM 1.582712 46.505886
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