PBH55 by Ohara

Obsolete Unknown Environmentally Dangerous

PBH55 by Ohara is an obsolete optical glass. It transmits from 0.36 to 2.40 µm with an nd of 1.84986 and a Vd of 24.054274. It has medium thermal expansion (CTE of 8.0×10⁻⁶/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: 0.360–2.400 µm
Optical Properties
Refractive Index (nd) 1.84986
Abbe Number (Vd) 24.054274
Dispersion Formula Sellmeier
Wavelength Range 0.3 — 2.4 µm
$$n(\lambda) = \sqrt{1 + \frac{1.81023\,\lambda^2}{\lambda^2 - 0.0139729} + \frac{0.447773\,\lambda^2}{\lambda^2 - 0.0582195} + \frac{1.12018\,\lambda^2}{\lambda^2 - 120.984}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.0
TCE 100/300°C (10-6/K) 9.2
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) 5.51
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
SFLDN3 Sumita 1.84666 23.9
SFN3 Sumita 1.84666 23.9
FDS90-SGP Hoya 1.84666 23.84
SF57HTultra Schott 1.84666 23.83
SF57HT Schott 1.84666 23.83
SF57 Schott 1.84666 23.83
ZF52 CDGM 1.846669 23.827549
FDS9 Hoya 1.846658 23.826345
K-SFLDn3W Sumita 1.8467 23.8
K-SFLDn3 Sumita 1.8467 23.8
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
PBH53W Ohara 1.846658 23.885544
PBH53 Ohara 1.846658 23.885544
S-NPH53 Ohara 1.84666 23.88395
TIH53 Ohara 1.846659 23.780116
S-TIH53 Ohara 1.84666 23.77794
S-TIH53W Ohara 1.84666 23.77794
L-TIH53 Ohara 1.84666 23.773536
S-NBH56 Ohara 1.854779 24.79898
PBH56 Ohara 1.84139 24.559059
S-NPH5 Ohara 1.858955 22.728736
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