C90-50 by Corning

Standard Unknown Environmentally Friendly

C90-50 by Corning is a standard optical glass. It transmits from 0.28 to 1.80 µm with an nd of 1.689009 and a Vd of 49.625392. It has medium thermal expansion (CTE of 7.2×10⁻⁶/K).

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: 0.280–1.800 µm
Optical Properties
Refractive Index (nd) 1.689009
Abbe Number (Vd) 49.625392
Dispersion Formula Schott
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{2.79279 - 0.0100483\,\lambda^2 + 0.0205042\,\lambda^{-2} + 0.000511249\,\lambda^{-4} - 1.38928 \times 10^{-5}\,\lambda^{-6} + 1.20182 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.2
TCE 100/300°C (10-6/K) 8.4
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.66
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
LAFN23 Schott 1.689004 49.711581
LAFL23 Hoya 1.689 49.475821
LAFL1 Hoya 1.686004 49.347081
LAFN1 Sumita 1.685 49.2
H-LAF1 CDGM 1.69362 49.193837
LAKN10 Sumita 1.692 50.6
LACL5 Hoya 1.693503 50.787122
LAL58 Ohara 1.693495 50.807634
S-LAL58 Ohara 1.693495 50.810652
LAM59 Ohara 1.697002 48.535864
Similar Glasses (Corning)
Glass Manufacturer nd Vd Compare
C67-48 Corning 1.666698 48.434395
C70-47 Corning 1.670005 47.112037
D17-48 Corning 1.717011 47.998493
D20-50 Corning 1.720003 50.312121
C58-51 Corning 1.658503 51.012014
C90-55 Corning 1.691008 54.793839
D13-54 Corning 1.713 53.843096
C97-55 Corning 1.697005 55.409848
C78-56 Corning 1.678004 55.519168
D34-51 Corning 1.733513 51.387663
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