BPH45 by Ohara

Obsolete Unknown Environmentally Dangerous

BPH45 by Ohara is an obsolete optical glass. It transmits from 0.35 to 0.70 µm with an nd of 1.718502 and a Vd of 33.515702. It has low thermal expansion (CTE of 5.7×10⁻⁶/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: 0.350–0.700 µm
Optical Properties
Refractive Index (nd) 1.718502
Abbe Number (Vd) 33.515702
Dispersion Formula Schott
Wavelength Range 0.3 — 2.4 µm
$$n(\lambda) = \sqrt{2.86191 - 0.0124256\,\lambda^2 + 0.0298892\,\lambda^{-2} + 0.00103707\,\lambda^{-4} + 1.60157 \times 10^{-6}\,\lambda^{-6} + 4.45952 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 5.7
TCE 100/300°C (10-6/K) 6.9
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.198 \times 10^{-5} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.16
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance 52
Alkali Resistance —
Phosphate Resistance 4
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
ADF455 Hoya 1.71852 33.456548
KZFS8 Schott 1.72047 34.613955
N-KZFS8 Schott 1.72047 34.7
H-TF8 CDGM 1.72046 34.757746
NBFD32 Hoya 1.73037 32.23
BASF54 Schott 1.73627 32.149453
BAFD14 Hoya 1.699678 34.925493
CSBR Generic IR 1.69706 34.108015
KZFS50 Sumita 1.74 31.7
CD45 Sumita 1.6932 33.7
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
S-NBH8 Ohara 1.720467 34.707984
BPH8 Ohara 1.720467 34.716156
S-NBH53V Ohara 1.737999 32.32659
S-NBH53 Ohara 1.737999 32.261312
BPH50 Ohara 1.739997 31.710001
S-TIH20 Ohara 1.70585 30.244176
S-TIH1 Ohara 1.717362 29.518091
PBH1 Ohara 1.717362 29.513538
PBH18 Ohara 1.721506 29.243262
S-TIH18 Ohara 1.721507 29.23233
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