B89-61 by Corning

Standard Unknown Environmentally Friendly

B89-61 by Corning is a standard optical glass. It transmits from 0.29 to 1.80 µm with an nd of 1.588998 and a Vd of 61.218914. It has low thermal expansion (CTE of 5.3×10⁻⁶/K).

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) 1.588998
Abbe Number (Vd) 61.218914
Dispersion Formula Schott
Wavelength Range 0.29 — 1.8 µm
$$n(\lambda) = \sqrt{2.48627 - 0.00979076\,\lambda^2 + 0.0143473\,\lambda^{-2} - 2.97219 \times 10^{-5}\,\lambda^{-4} + 3.43246 \times 10^{-5}\,\lambda^{-6} - 1.67327 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 5.3
TCE 100/300°C (10-6/K) 6.3
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) 3.3
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
BAL35Y Ohara 1.58913 61.233033
K-SK5 Sumita 1.58913 61.2
SK5 Sumita 1.58913 61.2
K-SKLD5 Sumita 1.58913 61.2
M-BACD5N Hoya 1.58913 61.25
MP-BACD5N Hoya 1.58913 61.25
MC-BACD5N Hoya 1.58913 61.25
BACD5 Hoya 1.58913 61.25
H-ZK3A CDGM 1.58913 61.2531
H-ZK3 CDGM 1.58913 61.253571
Similar Glasses (Corning)
Glass Manufacturer nd Vd Compare
C04-64 Corning 1.603507 63.401916
B64-61 Corning 1.564005 60.964853
C09-59 Corning 1.608756 59.036803
C13-58 Corning 1.612693 58.570371
B72-57 Corning 1.572498 57.494511
C20-60 Corning 1.620406 60.332956
C07-57 Corning 1.607504 56.610495
C23-58 Corning 1.623004 58.102071
C13-56 Corning 1.613498 56.417725
B69-56 Corning 1.568797 56.044859
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