PBL25 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) 1.581439
Abbe Number (Vd) 40.753351
Dispersion Formula Schott
Wavelength Range 0.3 — 2.4 µm
$$n(\lambda) = \sqrt{2.44655 - 0.00977685\,\lambda^2 + 0.0175311\,\lambda^{-2} + 0.000952509\,\lambda^{-4} - 5.48378 \times 10^{-5}\,\lambda^{-6} + 4.73039 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.7
TCE 100/300°C (10-6/K) 9.8
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[3.712 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.23
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 2
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd
H-QF50A CDGM 1.58144 40.746424
LF5 Sumita 1.58144 40.8
B81-41 Corning 1.581396 40.816116
N-LF5 Schott 1.58144 40.848909
LF5 Schott 1.58144 40.85
QF50GTI CDGM 1.58144 40.885954
QF50 CDGM 1.58144 40.885954
FL5 Hoya 1.581437 40.887611
H-QF50 CDGM 1.58144 40.888972
E-FL5 Hoya 1.58144 40.89
Similar Glasses (Ohara)
Glass Manufacturer nd Vd
S-TIL25 Ohara 1.581439 40.747566
PBL25Y Ohara 1.581439 40.768047
PBL35Y Ohara 1.581591 40.855991
PBL22 Ohara 1.589206 41.07921
PBL27 Ohara 1.575006 41.491052
S-TIL27 Ohara 1.575006 41.505207
PBL21 Ohara 1.573092 42.576094
PBM8Y Ohara 1.595509 39.260208
S-TIM8 Ohara 1.595509 39.242273
PBM8 Ohara 1.595508 39.213424
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