PBH72 by Ohara

Obsolete Unknown Environmentally Dangerous

PBH72 by Ohara is an obsolete optical glass. It transmits from 0.39 to 0.90 µm with an nd of 1.915356 and a Vd of 21.171926. It has medium thermal expansion (CTE of 8.8×10⁻⁶/K), below average chemical resistance, and dangerous environmental properties.

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: 0.390–0.900 µm
Optical Properties
Refractive Index (nd) 1.915356
Abbe Number (Vd) 21.171926
Dispersion Formula Schott
Wavelength Range 0.3 — 2.4 µm
$$n(\lambda) = \sqrt{3.46849 - 0.0107316\,\lambda^2 + 0.0582522\,\lambda^{-2} + 0.00465367\,\lambda^{-4} - 0.00030343\,\lambda^{-6} + 4.82163 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.8
TCE 100/300°C (10-6/K) 9.6
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[2.001 \times 10^{-5} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 5.97
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance 53
Alkali Resistance —
Phosphate Resistance 4
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
SF58 Schott 1.917613 21.51112
REALVIEW_1.9_LIGHTWEIGHT Schott 1.922002 21.44
FDS1 Hoya 1.922859 20.883457
M-FDS1 Hoya 1.92286 20.88
N-SF66 Schott 1.92286 20.88
SF66 Schott 1.92286 20.88
MP-FDS1 Hoya 1.92286 20.88
E-FDS1 Hoya 1.92286 20.88
E-FDS1-W Hoya 1.92286 20.88
H-ZF62 CDGM 1.92286 20.879915
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
PBH71 Ohara 1.922864 21.288699
PBH21 Ohara 1.922861 20.884172
S-NPH2 Ohara 1.92286 18.896912
S-NPH4 Ohara 1.89286 20.36181
L-NBH54 Ohara 1.902 25.101413
S-NPH3 Ohara 1.95906 17.471252
S-TIH57 Ohara 1.963 24.1144
S-NPH5 Ohara 1.858955 22.728736
S-NBH56 Ohara 1.854779 24.79898
PBH55 Ohara 1.84986 24.054274
Compare Glasses
    Compare Selected