C90-55 by Corning

Standard Unknown Environmentally Friendly
Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.29–1.8 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.29–1.8 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.290–1.800 µm
Optical Properties
Refractive Index (nd) 1.691008
Abbe Number (Vd) 54.793839
Dispersion Formula Schott
Wavelength Range 0.29 — 1.8 µm
$$n(\lambda) = \sqrt{2.80408 - 0.0113472\,\lambda^2 + 0.0204014\,\lambda^{-2} - 0.000130575\,\lambda^{-4} + 6.37029 \times 10^{-5}\,\lambda^{-6} - 2.90346 \times 10^{-6}\,\lambda^{-8}}$$
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) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[5.7 \times 10^{-7} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.67
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
LAK9 Sumita 1.691 54.8
K-LaK9 Sumita 1.691 54.8
H-LAK59A CDGM 1.691 54.815309
S-LAL9 Ohara 1.691002 54.822578
LAL9 Ohara 1.691002 54.84322
LAK9G15 Schott 1.69064 54.76
N-LAK9 Schott 1.691 54.71
LAK9 Schott 1.691002 54.708408
LAC9 Hoya 1.691 54.7
H-LAK2A CDGM 1.69211 54.539198
Similar Glasses (Corning)
Glass Manufacturer nd Vd
C97-55 Corning 1.697005 55.409848
C97-56 Corning 1.697 56.222926
C78-56 Corning 1.678004 55.519168
D13-54 Corning 1.713 53.843096
C57-57 Corning 1.657503 57.198059
C90-50 Corning 1.689009 49.625392
C51-56 Corning 1.651124 55.895803
C58-51 Corning 1.658503 51.012014
D20-50 Corning 1.720003 50.312121
C52-58 Corning 1.6516 58.511488
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