BPM51 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: 0.310–2.400 µm
Optical Properties
Refractive Index (nd) 1.613397
Abbe Number (Vd) 44.266767
Dispersion Formula Sellmeier
Wavelength Range 0.3 — 2.4 µm
$$n(\lambda) = \sqrt{1 + \frac{1.37436\,\lambda^2}{\lambda^2 - 0.00877166} + \frac{0.174026\,\lambda^2}{\lambda^2 - 0.040525} + \frac{0.905486\,\lambda^2}{\lambda^2 - 72.7685}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 5.2
TCE 100/300°C (10-6/K) 6.2
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[7.297 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.24
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
KZFSN4 Schott 1.6134 44.29
ADF40 Hoya 1.6134 44.290061
LAF45 Hoya 1.61396 44.29
KZFS1 Schott 1.613099 44.339473
E-ADF10 Hoya 1.6131 44.36
ADF10 Hoya 1.613102 44.361138
C13-44 Corning 1.613394 44.386543
H-TF3L CDGM 1.6134 44.107022
TF3 CDGM 1.612423 44.093486
N-KZFS4HT Schott 1.61336 44.49
Similar Glasses (Ohara)
Glass Manufacturer nd Vd
S-NBM51 Ohara 1.613397 44.267706
BPM4 Ohara 1.6134 43.841533
BAM4 Ohara 1.60562 43.723021
S-BAM4 Ohara 1.60562 43.706978
BAM25 Ohara 1.60323 42.320943
BAM8 Ohara 1.62374 47.09722
S-NBM52 Ohara 1.622049 41.079324
S-BAM12 Ohara 1.6393 44.872804
BAM12 Ohara 1.6393 44.878032
BAM23 Ohara 1.607167 40.26316
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