TPH55 by Ohara

Obsolete Unknown Environmentally Dangerous

TPH55 by Ohara is an obsolete optical glass. It transmits from 0.37 to 0.90 µm with an nd of 1.755502 and a Vd of 25.066156. It has 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: 0.370–0.900 µm
Optical Properties
Refractive Index (nd) 1.755502
Abbe Number (Vd) 25.066156
Dispersion Formula Schott
Wavelength Range 0.3 — 2.4 µm
$$n(\lambda) = \sqrt{2.95698 - 0.0138565\,\lambda^2 + 0.0372657\,\lambda^{-2} + 0.00291402\,\lambda^{-4} - 0.000200798\,\lambda^{-6} + 2.94572 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 9.4
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.06
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 Compare
FF8 Hoya 1.75211 25.05
SF14 Sumita 1.76182 26.5
K-SFLD14 Sumita 1.76182 26.5
SF14 Schott 1.76182 26.53
N-SF14 Schott 1.76182 26.53
FD14 Hoya 1.761823 26.552048
ZF12 CDGM 1.761822 26.555686
H-ZF12 CDGM 1.76182 26.607986
FD140 Hoya 1.76182 26.61
D62-27 Corning 1.761802 26.90455
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
S-TIH14 Ohara 1.761821 26.517885
TIH14 Ohara 1.761821 26.517966
PBH14 Ohara 1.761819 26.553651
PBH14W Ohara 1.761819 26.553651
PBH25 Ohara 1.761797 27.107724
PBH25W Ohara 1.761797 27.107726
S-TIH4 Ohara 1.755199 27.512089
PBH4W Ohara 1.755199 27.512146
PBH4 Ohara 1.755199 27.512146
S-NPH7 Ohara 1.7783 23.911598
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