PBL21 by Ohara

Obsolete Unknown Environmentally Dangerous
Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.3–2.4 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.3–2.4 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.310–0.700 µm
Optical Properties
Refractive Index (nd) 1.573092
Abbe Number (Vd) 42.576094
Dispersion Formula Schott
Wavelength Range 0.3 — 2.4 µm
$$n(\lambda) = \sqrt{2.42386 - 0.00949401\,\lambda^2 + 0.0162066\,\lambda^{-2} + 0.00101051\,\lambda^{-4} - 7.26838 \times 10^{-5}\,\lambda^{-6} + 5.41985 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.5
TCE 100/300°C (10-6/K) 9.5
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[2.501 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.17
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance 1
Alkali Resistance —
Phosphate Resistance 1
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd
FL1 Hoya 1.573091 42.586108
LF1 Sumita 1.57309 42.7
LF6 Sumita 1.56732 42.8
H-QF56 CDGM 1.56732 42.810117
E-FL6 Hoya 1.56732 42.84
FL6 Hoya 1.567324 42.843119
LF6HT Schott 1.56732 42.847665
FL7 Hoya 1.57501 41.509668
H-QF3 CDGM 1.57501 41.504715
LF7 Schott 1.575011 41.490793
Similar Glasses (Ohara)
Glass Manufacturer nd Vd
S-TIL26 Ohara 1.567322 42.817076
PBL26 Ohara 1.567322 42.831708
PBL26Y Ohara 1.567322 42.855569
S-TIL27 Ohara 1.575006 41.505207
PBL27 Ohara 1.575006 41.491052
PBL35Y Ohara 1.581591 40.855991
PBL25Y Ohara 1.581439 40.768047
PBL25 Ohara 1.581439 40.753351
S-TIL25 Ohara 1.581439 40.747566
PBL22 Ohara 1.589206 41.07921
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