C26-36 by Corning

Standard Unknown Environmentally Friendly

C26-36 by Corning is a standard optical glass. It transmits from 0.32 to 1.80 µm with an nd of 1.625903 and a Vd of 35.60701. It has medium thermal expansion (CTE of 8.7×10⁻⁶/K).

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.32–1.8 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.32–1.8 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.320–1.800 µm
Optical Properties
Refractive Index (nd) 1.625903
Abbe Number (Vd) 35.60701
Dispersion Formula Schott
Wavelength Range 0.32 — 1.8 µm
$$n(\lambda) = \sqrt{2.57015 - 0.0079909\,\lambda^2 + 0.0245888\,\lambda^{-2} + 0.000452644\,\lambda^{-4} + 4.37142 \times 10^{-5}\,\lambda^{-6} + 1.20155 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.7
TCE 100/300°C (10-6/K) 9.7
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) 3.65
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
F1 Sumita 1.62588 35.6
F7 Hoya 1.625363 35.583498
F7 Schott 1.625361 35.561194
H-F13 CDGM 1.62588 35.698971
S-TIM1 Ohara 1.625882 35.699614
F1 Schott 1.625882 35.700495
PBM1 Ohara 1.625882 35.700668
F13 CDGM 1.625884 35.713679
H-F6 CDGM 1.62495 35.585173
F6 CDGM 1.624954 35.577816
Similar Glasses (Corning)
Glass Manufacturer nd Vd Compare
C20-36 Corning 1.62001 36.30126
C37-35 Corning 1.636493 35.322642
C48-34 Corning 1.647992 33.943274
C04-38 Corning 1.603499 38.110538
C51-39 Corning 1.650206 39.193419
C55-40 Corning 1.6555 40.115717
C67-33 Corning 1.666997 33.114648
C38-42 Corning 1.637752 42.433862
C72-32 Corning 1.672698 32.31788
B81-41 Corning 1.581396 40.816116
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