LACL4 by Hoya

Obsolete Unknown Environmentally Dangerous

LACL4 by Hoya is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.669603 and a Vd of 51.65903. 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) 1.669603
Abbe Number (Vd) 51.65903
Dispersion Formula Schott
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{2.72528 - 0.00695893\,\lambda^2 + 0.0238232\,\lambda^{-2} - 0.000890411\,\lambda^{-4} + 0.000145573\,\lambda^{-6} - 5.35643 \times 10^{-6}\,\lambda^{-8}}$$
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
LAKN7 Sumita 1.67 51.7
K-LaKn7 Sumita 1.67 51.7
H-LAK67 CDGM 1.67 51.738482
BBO Generic Birefringent 1.670737 52.593907
LAL56 Ohara 1.677898 50.723364
S-LAL56 Ohara 1.677898 50.722184
LAKN8 Sumita 1.678 50.7
C58-51 Corning 1.658503 51.012014
SSKN5 Schott 1.65844 50.882921
N-SSK5 Schott 1.65844 50.88
Similar Glasses (Hoya)
Glass Manufacturer nd Vd Compare
LACL9 Hoya 1.6779 50.551353
BACED5 Hoya 1.65844 50.86
LACL3 Hoya 1.664798 53.401295
LACL8 Hoya 1.677896 53.419218
BAF21 Hoya 1.66422 48.941939
E-BACED20 Hoya 1.6485 53.03
BACED20 Hoya 1.648498 53.03151
LAFL1 Hoya 1.686004 49.347081
LACL5 Hoya 1.693503 50.787122
BAF11 Hoya 1.66672 48.3
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