PK3 by Schott

Obsolete Unknown Environmentally Dangerous

PK3 by Schott is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.525419 and a Vd of 64.662422. It has medium thermal expansion (CTE of 7.1×10⁻⁶/K) and 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
Transmission Calculator
Valid wavelength range: 0.334–2.325 µm
Optical Properties
Refractive Index (nd) 1.525419
Abbe Number (Vd) 64.662422
Dispersion Formula Sellmeier
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{1.14966\,\lambda^2}{\lambda^2 - 0.00670136} + \frac{0.147546\,\lambda^2}{\lambda^2 - 0.0227276} + \frac{1.03052\,\lambda^2}{\lambda^2 - 103.152}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.1
TCE 100/300°C (10-6/K) 8.3
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.08 \times 10^{-6} + 2(1.29 \times 10^{-8})\,\Delta T + 3(-2.65 \times 10^{-11})\,\Delta T^2 + \frac{4.37 \times 10^{-7} + 2(7.07 \times 10^{-10})\,\Delta T}{\lambda - 0.138}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 2.59
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 —
Notes

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Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
PC3 Hoya 1.52542 64.619542
BSL22 Ohara 1.518206 65.039654
B18-65 Corning 1.518199 65.115452
PC2 Hoya 1.51821 65.160509
B16-64 Corning 1.516804 64.224234
BSC7 Hoya 1.5168 64.2
H-K9L CDGM 1.5168 64.198732
H-K9L* CDGM 1.5168 64.198732
H-K9LGT CDGM 1.5168 64.198732
H-K9LAGT CDGM 1.5168 64.198695
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
PK2 Schott 1.518211 65.054286
BK8 Schott 1.520152 63.685744
UBK7 Schott 1.516801 64.289727
N-BK7HT Schott 1.5168 64.17
N-BK7HTi Schott 1.5168 64.17
N-BK7HTSultra Schott 1.5168 64.17
N-BK7 Schott 1.5168 64.17
BK7 Schott 1.5168 64.167336
BK7G18 Schott 1.51975 63.58
BK7HT Schott 1.51633 64.14348
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