LAFL2 by Hoya

Obsolete Unknown Environmentally Dangerous

LAFL2 by Hoya is an obsolete optical glass. It transmits from 0.33 to 1.55 µm with an nd of 1.697 and a Vd of 48.514006. It has average chemical resistance, moderate relative cost, and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.25–1.55 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.25–1.55 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.330–1.550 µm
Optical Properties
Refractive Index (nd) 1.697
Abbe Number (Vd) 48.514006
Dispersion Formula Schott
Wavelength Range 0.25 — 1.55 µm
$$n(\lambda) = \sqrt{2.8178 - 0.0101263\,\lambda^2 + 0.0209898\,\lambda^{-2} + 0.000606923\,\lambda^{-4} - 2.1975 \times 10^{-5}\,\lambda^{-6} + 2.01729 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 86.0
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) 4.05
Relative Cost 5.5
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance 3
Acid Resistance 3
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
S-LAM59 Ohara 1.697002 48.516066
LAFN2 Sumita 1.697 48.5
LAM59 Ohara 1.697002 48.535864
S-LAM51 Ohara 1.699998 48.080479
H-LAF51 CDGM 1.7 48.079839
LAM51 Ohara 1.699998 48.078869
K-LaFn3 Sumita 1.7 48.0
LAFN3 Sumita 1.7 48.0
H-LAF1 CDGM 1.69362 49.193837
C90-50 Corning 1.689009 49.625392
Similar Glasses (Hoya)
Glass Manufacturer nd Vd Compare
LAFL3 Hoya 1.700301 47.836538
LAFL23 Hoya 1.689 49.475821
LAFL1 Hoya 1.686004 49.347081
LAFL20 Hoya 1.68248 48.197606
LACL5 Hoya 1.693503 50.787122
LAF3 Hoya 1.717 47.98
LAF30 Hoya 1.717 47.97772
LACL9 Hoya 1.6779 50.551353
LAC10 Hoya 1.72 50.35
BAF10 Hoya 1.67003 47.2
Compare Glasses
    Compare Selected