L-BBH1 by Ohara

Obsolete Unknown Precision Molding Environmentally Friendly

L-BBH1 by Ohara is an obsolete optical glass. It transmits from 0.42 to 2.40 µm with an nd of 2.101949 and a Vd of 16.785097. It has medium thermal expansion (CTE of 10.7×10⁻⁶/K), below average chemical resistance, and precision molding compatibility.

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: 0.420–2.400 µm
Optical Properties
Refractive Index (nd) 2.101949
Abbe Number (Vd) 16.785097
Dispersion Formula Sellmeier
Wavelength Range 0.3 — 2.4 µm
$$n(\lambda) = \sqrt{1 + \frac{2.56598\,\lambda^2}{\lambda^2 - 0.0205164} + \frac{0.526892\,\lambda^2}{\lambda^2 - 0.0831738} + \frac{1.27957\,\lambda^2}{\lambda^2 - 109.788}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 10.7
TCE 100/300°C (10-6/K) —
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 6.57
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 3
Stain Resistance —
Acid Resistance 53
Alkali Resistance —
Phosphate Resistance 2
Notes

Low Softening Temperature

Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
E-FDS3-W Hoya 2.1042 17.02
E-FDS3 Hoya 2.1042 17.02
K-PSFn214(M) Sumita 2.13909 17.7
K-PSFn214P(M) Sumita 2.13919 17.7
K-PSFn173(M) Sumita 2.14342 17.3
K-PSFn214 Sumita 2.14355 17.8
K-PSFn214P Sumita 2.144 17.8
K-PSFn173 Sumita 2.1478 17.3
TAFD75-W Hoya 2.102 23.39
K-PSFn215 Sumita 2.154 17.2
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
L-BBH2 Ohara 2.102999 18.051064
S-LAH79 Ohara 2.0033 28.27328
S-LAH99W Ohara 2.001 29.139473
S-LAH99 Ohara 2.001 29.139473
S-NPH3 Ohara 1.95906 17.471252
S-TIH57 Ohara 1.963 24.1144
S-NPH2 Ohara 1.92286 18.896912
PBH21 Ohara 1.922861 20.884172
PBH71 Ohara 1.922864 21.288699
S-LAH98 Ohara 1.953749 32.324727
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