P-LAF37 by Schott

Preferred Unknown Precision Molding Environmentally Friendly

P-LAF37 by Schott is a preferred optical glass. It transmits from 0.32 to 2.50 µm with an nd of 1.7555 and a Vd of 45.66. It has low thermal expansion (CTE of 6.26×10⁻⁶/K) and precision molding compatibility.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.32–2.5 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.32–2.5 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.320–2.500 µm
Optical Properties
Refractive Index (nd) 1.7555
Abbe Number (Vd) 45.66
Dispersion Formula Sellmeier
Wavelength Range 0.32 — 2.5 µm
$$n(\lambda) = \sqrt{1 + \frac{1.76003\,\lambda^2}{\lambda^2 - 0.00938006} + \frac{0.248287\,\lambda^2}{\lambda^2 - 0.0360537} + \frac{1.15935\,\lambda^2}{\lambda^2 - 86.4325}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.26
TCE 100/300°C (10-6/K) 7.8
Thermal Conductivity (W/mK) 0.9
Heat Capacity (J/gK) 0.64
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[7.03 \times 10^{-6} + 2(1.15 \times 10^{-8})\,\Delta T + 3(7.48 \times 10^{-13})\,\Delta T^2 + \frac{7.25 \times 10^{-7} + 2(8.36 \times 10^{-10})\,\Delta T}{\lambda - 0.206}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.987
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) 115.28
Poisson's Ratio 0.3
Knoop Hardness (kgf/mm²) 697.0
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Notes

suitable for precision molding

Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
K-VC82 Sumita 1.7555 45.6
VC81 Sumita 1.75512 45.6
K-VC82(M) Sumita 1.75028 45.4
K-VC174 Sumita 1.7485 45.3
K-VC174(M) Sumita 1.74578 45.1
H-LAF3B CDGM 1.744 44.900027
LAF2 Sumita 1.744 44.9
LAF2 Hoya 1.744 44.9
K-LaF2 Sumita 1.744 44.9
LAF20 Hoya 1.744 44.872914
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
N-LAF2 Schott 1.74397 44.85
LAF2 Schott 1.744002 44.719972
LAFN24 Schott 1.757191 47.81177
N-LAF35 Schott 1.7433 49.4
LAFN10 Schott 1.784432 43.950523
N-LAF33 Schott 1.78582 44.05
N-LAF34 Schott 1.7725 49.62
LAFN28 Schott 1.773142 49.568242
N-LAF21 Schott 1.788 47.49
LAFN21 Schott 1.788309 47.470398
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