PBH25W by Ohara

Obsolete Unknown Environmentally Dangerous
Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.365–0.9 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.365–0.9 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.420–0.900 µm
Optical Properties
Refractive Index (nd) 1.761797
Abbe Number (Vd) 27.107726
Dispersion Formula Schott
Wavelength Range 0.365 — 0.9 µm
$$n(\lambda) = \sqrt{2.98303 - 0.0104359\,\lambda^2 + 0.0363465\,\lambda^{-2} + 0.00261941\,\lambda^{-4} - 0.000175132\,\lambda^{-6} + 2.13251 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.5
TCE 100/300°C (10-6/K) 8.5
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.2821 \times 10^{-5} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.79
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd
SF55 Schott 1.7618 26.950177
FDS5 Hoya 1.761804 26.914901
D62-27 Corning 1.761802 26.90455
FD140 Hoya 1.76182 26.61
H-ZF12 CDGM 1.76182 26.607986
ZF12 CDGM 1.761822 26.555686
FD14 Hoya 1.761823 26.552048
N-SF14 Schott 1.76182 26.53
SF14 Schott 1.76182 26.53
SF14 Sumita 1.76182 26.5
Similar Glasses (Ohara)
Glass Manufacturer nd Vd
PBH25 Ohara 1.761797 27.107724
PBH14W Ohara 1.761819 26.553651
PBH14 Ohara 1.761819 26.553651
TIH14 Ohara 1.761821 26.517966
S-TIH14 Ohara 1.761821 26.517885
S-TIH4 Ohara 1.755199 27.512089
PBH4 Ohara 1.755199 27.512146
PBH4W Ohara 1.755199 27.512146
TPH55 Ohara 1.755502 25.066156
S-TIH13 Ohara 1.740769 27.789359
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