PBM6 by Ohara

Obsolete Unknown Environmentally Dangerous

PBM6 by Ohara is an obsolete optical glass. It transmits from 0.33 to 0.90 µm with an nd of 1.636358 and a Vd of 35.376536. It has medium thermal expansion (CTE of 8.5×10⁻⁶/K), good 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: 0.330–0.900 µm
Optical Properties
Refractive Index (nd) 1.636358
Abbe Number (Vd) 35.376536
Dispersion Formula Schott
Wavelength Range 0.3 — 2.4 µm
$$n(\lambda) = \sqrt{2.604 - 0.00895033\,\lambda^2 + 0.0238118\,\lambda^{-2} + 0.000970806\,\lambda^{-4} - 3.07075 \times 10^{-5}\,\lambda^{-6} + 5.43972 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.5
TCE 100/300°C (10-6/K) 9.4
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[6.052 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.74
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 Compare
F7 CDGM 1.636365 35.386204
F6 Sumita 1.63636 35.4
F6 Schott 1.636359 35.341176
F6 Hoya 1.636356 35.340304
C37-35 Corning 1.636493 35.322642
SF7 Sumita 1.6398 34.6
E-FD7 Hoya 1.6398 34.57
FD7 Hoya 1.639803 34.568909
H-F51 CDGM 1.6398 34.46457
C26-36 Corning 1.625903 35.60701
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
S-TIM6 Ohara 1.636358 35.391923
PBM27 Ohara 1.639799 34.477127
S-TIM27 Ohara 1.639799 34.466422
S-TIM1 Ohara 1.625882 35.699614
PBM1 Ohara 1.625882 35.700668
PBM11 Ohara 1.620955 35.880852
TIM11 Ohara 1.620955 35.880852
PBM22 Ohara 1.647689 33.802937
S-TIM22 Ohara 1.647689 33.792803
PBM2 Ohara 1.620041 36.256658
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