S-TIM3 by Ohara

Special Unknown Environmentally Friendly

S-TIM3 by Ohara is a special optical glass. It transmits from 0.36 to 2.40 µm with an nd of 1.612929 and a Vd of 37.005342. It has medium thermal expansion (CTE of 7.7×10⁻⁶/K) and excellent chemical resistance.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.365015–2.32542 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.365015–2.32542 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.360–2.400 µm
Optical Properties
Refractive Index (nd) 1.612929
Abbe Number (Vd) 37.005342
Dispersion Formula Sellmeier
Wavelength Range 0.365015 — 2.32542 µm
$$n(\lambda) = \sqrt{1 + \frac{1.40691\,\lambda^2}{\lambda^2 - 0.0105634} + \frac{0.12837\,\lambda^2}{\lambda^2 - 0.0568483} + \frac{1.51826\,\lambda^2}{\lambda^2 - 152.108}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.7
TCE 100/300°C (10-6/K) —
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[5.47 \times 10^{-7} + 2(1.4 \times 10^{-8})\,\Delta T + 3(-3.91 \times 10^{-11})\,\Delta T^2 + \frac{7.23 \times 10^{-7} + 2(7.6 \times 10^{-10})\,\Delta T}{\lambda - 0.269}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 2.67
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance 1
Alkali Resistance —
Phosphate Resistance 1
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
H-F2 CDGM 1.61293 37.004441
F2 CDGM 1.612929 36.986002
F3 Schott 1.612931 37.038954
F3 Hoya 1.612929 36.964515
E-F3 Hoya 1.61293 36.96
F3 Sumita 1.61293 36.9
H-F3 CDGM 1.61659 36.651688
F4 Schott 1.616592 36.628072
F3 CDGM 1.616592 36.627394
F4 Hoya 1.616589 36.615561
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
PBM3 Ohara 1.612929 36.994096
PBM4 Ohara 1.616588 36.632973
PBM2Y Ohara 1.620041 36.269263
S-TIM2 Ohara 1.620041 36.263378
PBM2 Ohara 1.620041 36.256658
PBM9 Ohara 1.620451 38.119955
TIM11 Ohara 1.620955 35.880852
PBM11 Ohara 1.620955 35.880852
PBM5 Ohara 1.60342 38.012915
S-TIM5 Ohara 1.60342 38.027347
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