PBH23W by Ohara

Obsolete Unknown Environmentally Dangerous

PBH23W by Ohara is an obsolete optical glass. It transmits from 0.36 to 0.90 µm with an nd of 1.784702 and a Vd of 26.216753. It has medium thermal expansion (CTE of 7.5×10⁻⁶/K), 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: 0.360–0.900 µm
Optical Properties
Refractive Index (nd) 1.784702
Abbe Number (Vd) 26.216753
Dispersion Formula Schott
Wavelength Range 0.3 — 2.4 µm
$$n(\lambda) = \sqrt{3.05543 - 0.0108674\,\lambda^2 + 0.0385229\,\lambda^{-2} + 0.0030174\,\lambda^{-4} - 0.000212947\,\lambda^{-6} + 2.48648 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.5
TCE 100/300°C (10-6/K) 8.7
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.457 \times 10^{-5} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.99
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance 3
Alkali Resistance —
Phosphate Resistance 3
Notes

Improved Transmittance

Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
SFS3 Sumita 1.7847 26.2
FDS30 Hoya 1.784701 26.102957
N-SF56 Schott 1.7847 26.1
SF56A Schott 1.7847 26.08
SFL56 Schott 1.7847 26.078312
ZF51 CDGM 1.784701 26.075871
FDS3 Hoya 1.7847 26.057653
SFLD11 Sumita 1.78472 25.9
K-SFLD11 Sumita 1.78472 25.9
D85-26 Corning 1.784994 25.902085
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
PBH23 Ohara 1.784702 26.216753
S-TIH23 Ohara 1.784696 26.291221
TIH23 Ohara 1.784696 26.29817
PBH11 Ohara 1.784718 25.712726
PBH11W Ohara 1.784718 25.712726
S-TIH11 Ohara 1.784723 25.683446
TIH11 Ohara 1.784723 25.677885
S-NBH58 Ohara 1.7888 28.42865
S-NPH7 Ohara 1.7783 23.911598
PBH6 Ohara 1.805177 25.435012
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