S-FPL52 by Ohara

Obsolete Unknown Environmentally Friendly

S-FPL52 by Ohara is an obsolete optical glass. It transmits from 0.29 to 2.40 µm with an nd of 1.455999 and a Vd of 90.288026. It has high thermal expansion (CTE of 13.3×10⁻⁶/K) and below average chemical resistance.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.29–2.4 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.29–2.4 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.290–2.400 µm
Optical Properties
Refractive Index (nd) 1.455999
Abbe Number (Vd) 90.288026
Dispersion Formula Sellmeier
Wavelength Range 0.29 — 2.4 µm
$$n(\lambda) = \sqrt{1 + \frac{1.06786\,\lambda^2}{\lambda^2 - 0.00699227} + \frac{0.0335858\,\lambda^2}{\lambda^2 - -0.0207609} + \frac{1.1022\,\lambda^2}{\lambda^2 - 226.497}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 13.3
TCE 100/300°C (10-6/K) 15.8
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) 3.53
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance 52
Alkali Resistance —
Phosphate Resistance 4
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
H-FK71 CDGM 1.4565 90.273821
FCD10 Hoya 1.4565 90.27
H-FK71A CDGM 1.456498 90.470884
FCD10A Hoya 1.4586 90.19
K-PFK90 Sumita 1.4588 90.0
K-PFK90(M) Sumita 1.45733 89.8
N-FK58 Schott 1.456 90.9
FK54 Schott 1.437 90.702365
SRF2 Generic IR 1.437925 91.593259
LIYF4-E Generic Birefringent 1.476472 88.935059
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
FPL52 Ohara 1.455999 90.31888
S-FPL55 Ohara 1.43875 94.661059
S-FPL53 Ohara 1.43875 94.946025
FPL53 Ohara 1.43875 94.960437
FPL51 Ohara 1.496999 81.61466
S-FPL51 Ohara 1.496999 81.545888
S-FPL51Y Ohara 1.497003 81.138165
S-FPM4 Ohara 1.52841 76.452824
S-FPM3 Ohara 1.53775 74.703119
S-FSL5Y Ohara 1.48749 70.354425
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