C99-30 by Corning

Standard Unknown Environmentally Friendly

C99-30 by Corning is a standard optical glass. It transmits from 0.35 to 1.80 µm with an nd of 1.699002 and a Vd of 30.107427. It has medium thermal expansion (CTE of 7.9×10⁻⁶/K).

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.35–1.8 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.35–1.8 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.350–1.800 µm
Optical Properties
Refractive Index (nd) 1.699002
Abbe Number (Vd) 30.107427
Dispersion Formula Schott
Wavelength Range 0.35 — 1.8 µm
$$n(\lambda) = \sqrt{2.78905 - 0.00964699\,\lambda^2 + 0.0302361\,\lambda^{-2} + 0.00179006\,\lambda^{-4} - 0.000112643\,\lambda^{-6} + 1.44954 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.9
TCE 100/300°C (10-6/K) 8.8
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) 4.16
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
PBM35 Ohara 1.698947 30.121211
S-TIM35 Ohara 1.698947 30.127865
SF15 Schott 1.69895 30.07
ZF11 CDGM 1.698949 30.065686
FD15 Hoya 1.698945 30.050548
H-ZF11 CDGM 1.69894 30.05045
E-FD15L Hoya 1.69895 30.05
E-FD15 Hoya 1.69895 30.05
N-SF15 Schott 1.69892 30.2
SF15 Sumita 1.69895 30.0
Similar Glasses (Corning)
Glass Manufacturer nd Vd Compare
C89-31 Corning 1.689004 31.210861
D17-29 Corning 1.717409 29.492751
C72-32 Corning 1.672698 32.31788
D28-28 Corning 1.728304 28.397796
C67-33 Corning 1.666997 33.114648
D40-28 Corning 1.740001 28.102623
D34-26 Corning 1.73402 26.500794
C97-36 Corning 1.695989 36.517325
C48-34 Corning 1.647992 33.943274
D56-27 Corning 1.755203 27.591377
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