LAFL4 by Hoya

Obsolete Unknown Environmentally Dangerous

LAFL4 by Hoya is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.712704 and a Vd of 43.295113. 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) 1.712704
Abbe Number (Vd) 43.295113
Dispersion Formula Schott
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{2.85547 - 0.00960968\,\lambda^2 + 0.0294213\,\lambda^{-2} - 0.00107604\,\lambda^{-4} + 0.000236124\,\lambda^{-6} - 1.03721 \times 10^{-5}\,\lambda^{-8}}$$
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
H-LAF62 CDGM 1.72 43.680739
S-LAM52 Ohara 1.72 43.689812
LAFN4 Sumita 1.72 43.7
LAM52 Ohara 1.72 43.705625
LAFN10 Sumita 1.72016 42.1
LAM58 Ohara 1.72 41.989859
S-LAM58 Ohara 1.72 41.978463
BAH27 Ohara 1.701536 41.242277
S-BAH27 Ohara 1.701536 41.23944
BAH77 Ohara 1.701539 41.21001
Similar Glasses (Hoya)
Glass Manufacturer nd Vd Compare
LAFL5 Hoya 1.719998 43.903303
LAFL6 Hoya 1.72 42.016239
BAFD7 Hoya 1.70154 41.15
BAFD15 Hoya 1.701999 40.195943
ADF8 Hoya 1.686498 42.863902
BAF20 Hoya 1.685777 43.901833
M-LAF81 Hoya 1.73077 40.5
MP-LAF81 Hoya 1.73077 40.5
BAF22 Hoya 1.682496 44.671672
LAF20 Hoya 1.744 44.872914
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