LAFL23 by Hoya

Obsolete Unknown Environmentally Dangerous

LAFL23 by Hoya is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.689 and a Vd of 49.475821. It has 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

No transmission data available.

Transmission Calculator
Valid wavelength range: 0.334–2.325 µm
Optical Properties
Refractive Index (nd) 1.689
Abbe Number (Vd) 49.475821
Dispersion Formula Schott
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{2.79235 - 0.00992418\,\lambda^2 + 0.0208009\,\lambda^{-2} + 0.000416524\,\lambda^{-4} - 7.924 \times 10^{-7}\,\lambda^{-6} + 1.05117 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) —
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) —
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
C90-50 Corning 1.689009 49.625392
LAFN23 Schott 1.689004 49.711581
LAFN1 Sumita 1.685 49.2
H-LAF1 CDGM 1.69362 49.193837
LAKN10 Sumita 1.692 50.6
LAM59 Ohara 1.697002 48.535864
S-LAM59 Ohara 1.697002 48.516066
LAFN2 Sumita 1.697 48.5
LAL58 Ohara 1.693495 50.807634
S-LAL58 Ohara 1.693495 50.810652
Similar Glasses (Hoya)
Glass Manufacturer nd Vd Compare
LAFL1 Hoya 1.686004 49.347081
LACL5 Hoya 1.693503 50.787122
LAFL2 Hoya 1.697 48.514006
LAFL20 Hoya 1.68248 48.197606
LACL9 Hoya 1.6779 50.551353
LAFL3 Hoya 1.700301 47.836538
BAF11 Hoya 1.66672 48.3
BAF21 Hoya 1.66422 48.941939
LACL4 Hoya 1.669603 51.65903
BAF10 Hoya 1.67003 47.2
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