ULTRAN30 by Schott

Obsolete Unknown Environmentally Dangerous

ULTRAN30 by Schott is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.5483 and a Vd of 74.244488. It has high thermal expansion (CTE of 11.9×10⁻⁶/K) and 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
Transmission Calculator
Valid wavelength range: 0.334–2.325 µm
Optical Properties
Refractive Index (nd) 1.5483
Abbe Number (Vd) 74.244488
Dispersion Formula Sellmeier
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{0.730713\,\lambda^2}{\lambda^2 - 0.00314818} + \frac{0.636952\,\lambda^2}{\lambda^2 - 0.012991} + \frac{0.856177\,\lambda^2}{\lambda^2 - 143.605}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 11.9
TCE 100/300°C (10-6/K) 13.9
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-1.78 \times 10^{-5} + 2(-3.07 \times 10^{-9})\,\Delta T + 3(1.31 \times 10^{-11})\,\Delta T^2 + \frac{3.87 \times 10^{-7} + 2(4.58 \times 10^{-10})\,\Delta T}{\lambda - 0.159}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.02
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 —
Notes

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Glass Manufacturer nd Vd Compare
H-FK55 CDGM 1.5502 75.224681
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S-FPM3 Ohara 1.53775 74.703119
K-PSK500 Sumita 1.55215 72.0
K-PSK500(M) Sumita 1.55 71.9
FCD500 Hoya 1.55397 71.76
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Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
PK51A Schott 1.528554 76.975515
N-PK51 Schott 1.52855 76.98
N-PSK58 Schott 1.56907 71.205585
PK50 Schott 1.52054 69.712402
PSK50 Schott 1.557529 67.282893
N-PSK57 Schott 1.5924 68.398667
P-PK53 Schott 1.5269 66.22
FK5HTi Schott 1.48748 70.47
N-FK5 Schott 1.48749 70.41
FK5 Schott 1.48749 70.405771
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