FSL5 by Ohara

Obsolete Unknown Environmentally Dangerous

FSL5 by Ohara is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.48749 and a Vd of 70.21026. It has dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.334–2.325 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.334–2.325 µm
Abbe Number Calculator
Transmission vs Wavelength

No transmission data available.

Transmission Calculator
Valid wavelength range: 0.334–2.325 µm
Optical Properties
Refractive Index (nd) 1.48749
Abbe Number (Vd) 70.21026
Dispersion Formula Schott
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{2.1898 - 0.00987154\,\lambda^2 + 0.00813796\,\lambda^{-2} + 0.000424317\,\lambda^{-4} - 4.3722 \times 10^{-5}\,\lambda^{-6} + 2.30058 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) —
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) —
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
FK5 Sumita 1.48749 70.4
K-FK5 Sumita 1.48749 70.4
FK5 Schott 1.48749 70.405771
N-FK5 Schott 1.48749 70.41
D-QK3L-25 CDGM 1.48687 70.417086
FC5 Hoya 1.48749 70.44
H-QK3LGTI CDGM 1.48749 70.440487
D-QK3L CDGM 1.48749 70.440487
H-QK3L CDGM 1.48749 70.440487
FK5HTi Schott 1.48748 70.47
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
S-FSL5 Ohara 1.48749 70.236252
S-FSL5Y Ohara 1.48749 70.354425
BSL21 Ohara 1.503779 66.814545
S-APL1 Ohara 1.517277 69.563209
APL1 Ohara 1.517277 69.563209
S-APL Ohara 1.517277 69.56319
SK-1310 Ohara 1.458663 67.854535
SK-1300 Ohara 1.458567 67.837244
FSL3 Ohara 1.464499 65.938855
BSL3 Ohara 1.498308 65.026785
Compare Glasses
    Compare Selected