K-PSFn166(M) by Sumita

Standard Rare Environmentally Friendly

K-PSFn166(M) by Sumita is a standard optical glass with a rare melt frequency. It transmits from 0.33 to 2.00 µm with an nd of 1.65858 and a Vd of 34.4. It has medium thermal expansion (CTE of 9.1×10⁻⁶/K) and excellent chemical resistance.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.36–1.55 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.36–1.55 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.330–2.000 µm
Optical Properties
Refractive Index (nd) 1.65858
Abbe Number (Vd) 34.4
Dispersion Formula Schott
Wavelength Range 0.36 — 1.55 µm
$$n(\lambda) = \sqrt{2.67282 - 0.0108285\,\lambda^2 + 0.0253052\,\lambda^{-2} + 0.00103937\,\lambda^{-4} - 2.97955 \times 10^{-5}\,\lambda^{-6} + 7.36528 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 9.1
TCE 100/300°C (10-6/K) 11.3
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-6.43 \times 10^{-6} + 2(1.03 \times 10^{-8})\,\Delta T + 3(-2.4 \times 10^{-10})\,\Delta T^2 + \frac{7.06 \times 10^{-7} + 2(7.03 \times 10^{-10})\,\Delta T}{\lambda - 0.275}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.11
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance 1
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
FD9 Hoya 1.654462 33.717017
SF9 Schott 1.654461 33.651384
ZF8 CDGM 1.65446 33.651201
H-ZBAF4 CDGM 1.66426 35.484251
SF12 Schott 1.64831 33.841187
C48-34 Corning 1.647992 33.943274
FD12 Hoya 1.648308 33.793909
H-ZF1A CDGM 1.64769 33.887993
SF2 Schott 1.64769 33.85
H-ZF1 CDGM 1.64769 33.840317
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
K-PSFn166 Sumita 1.663 34.4
SF9 Sumita 1.65446 33.8
SF12 Sumita 1.64831 33.8
SF2 Sumita 1.64769 33.9
BASF2 Sumita 1.66446 35.9
SF19 Sumita 1.6668 33.1
K-PG395 Sumita 1.658 36.9
K-PG395(M) Sumita 1.65296 36.8
SF7 Sumita 1.6398 34.6
SF5 Sumita 1.6727 32.2
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