K-PG395 by Sumita

Obsolete Very Rare Environmentally Friendly

K-PG395 by Sumita is an obsolete optical glass with a very rare melt frequency. It transmits from 0.33 to 2.00 µm with an nd of 1.658 and a Vd of 36.9. It has high thermal expansion (CTE of 12.4×10⁻⁶/K) and good 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) 1.658
Abbe Number (Vd) 36.9
Dispersion Formula Schott
Wavelength Range 0.36 — 1.55 µm
$$n(\lambda) = \sqrt{2.67548 - 0.00974063\,\lambda^2 + 0.0238446\,\lambda^{-2} + 0.000980911\,\lambda^{-4} - 3.8466 \times 10^{-5}\,\lambda^{-6} + 6.99203 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 12.4
TCE 100/300°C (10-6/K) 15.9
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-1.15 \times 10^{-5} + 2(1.65 \times 10^{-9})\,\Delta T + 3(-6.23 \times 10^{-11})\,\Delta T^2 + \frac{1.13 \times 10^{-6} + 2(1.19 \times 10^{-9})\,\Delta T}{\lambda - 0.255}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.5
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance 3
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
BASF56 Schott 1.657149 36.735021
N-BASF2 Schott 1.66446 36.0
BAFD2 Hoya 1.664457 35.887705
BASF2 Schott 1.66446 35.829357
BAH22 Ohara 1.664459 35.812757
ATF2 Hoya 1.65052 38.036939
H-ZBAF4 CDGM 1.66426 35.484251
BAFD4 Hoya 1.651278 38.312578
S-NBH52 Ohara 1.672999 38.14817
S-NBH52V Ohara 1.673 38.256077
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
K-PG395(M) Sumita 1.65296 36.8
BASF2 Sumita 1.66446 35.9
BASF4 Sumita 1.65128 38.3
K-BaSF4 Sumita 1.65128 38.3
K-PSFn166(M) Sumita 1.65858 34.4
K-PSFn166 Sumita 1.663 34.4
BASF10 Sumita 1.65016 39.3
BASF12 Sumita 1.66998 39.2
SF9 Sumita 1.65446 33.8
F6 Sumita 1.63636 35.4
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