S-APL by Ohara

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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: 0.370–0.900 µm
Optical Properties
Refractive Index (nd) 1.517277
Abbe Number (Vd) 69.56319
Dispersion Formula Schott
Wavelength Range 0.365 — 0.9 µm
$$n(\lambda) = \sqrt{2.27624 - 0.00968746\,\lambda^2 + 0.00923304\,\lambda^{-2} + 0.000389409\,\lambda^{-4} - 3.80187 \times 10^{-5}\,\lambda^{-6} + 2.06932 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 9.6
TCE 100/300°C (10-6/K) 11.5
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-4.5274 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 2.59
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
PCS1 Hoya 1.517284 69.67869
PK50 Schott 1.52054 69.712402
K-PMK30(M) Sumita 1.52002 70.2
D-PK3-25 CDGM 1.52368 70.274839
D-PK3 CDGM 1.525 70.370578
K-PMK30 Sumita 1.525 70.4
K-PG325 Sumita 1.5067 70.5
K-PG325(M) Sumita 1.50506 70.4
PK1 Schott 1.503781 66.921827
PC1 Hoya 1.503779 66.88712
Similar Glasses (Ohara)
Glass Manufacturer nd Vd
APL1 Ohara 1.517277 69.563209
S-APL1 Ohara 1.517277 69.563209
BSL21 Ohara 1.503779 66.814545
FSL5 Ohara 1.48749 70.21026
S-FSL5 Ohara 1.48749 70.236252
S-FSL5Y Ohara 1.48749 70.354425
BSL22 Ohara 1.518206 65.039654
S-FPM5 Ohara 1.552 70.697068
BSL3 Ohara 1.498308 65.026785
BSL7Y Ohara 1.51633 64.243778
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