BAL22 by Ohara

Obsolete Unknown Environmentally Dangerous

BAL22 by Ohara is an obsolete optical glass. It transmits from 0.37 to 0.70 µm with an nd of 1.568729 and a Vd of 63.162358. It has medium thermal expansion (CTE of 6.6×10⁻⁶/K) and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.365–0.9 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.365–0.9 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.370–0.700 µm
Optical Properties
Refractive Index (nd) 1.568729
Abbe Number (Vd) 63.162358
Dispersion Formula Schott
Wavelength Range 0.365 — 0.9 µm
$$n(\lambda) = \sqrt{2.42882 - 0.0116008\,\lambda^2 + 0.0110857\,\lambda^{-2} + 0.00063122\,\lambda^{-4} - 6.39512 \times 10^{-5}\,\lambda^{-6} + 3.44001 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.6
TCE 100/300°C (10-6/K) 7.9
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[3.1613 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.06
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
PCD2 Hoya 1.56873 63.105028
PSK2 Sumita 1.56873 63.1
PSK2 Schott 1.56873 63.083014
H-ZK1 CDGM 1.56888 62.95699
P-SK11 Sumita 1.5658 61.0
K-PSK11 Sumita 1.5658 61.0
H-BAK4 CDGM 1.55248 63.36549
PCD3 Hoya 1.55232 63.424095
PSK3 Schott 1.552322 63.456253
N-PSK3 Schott 1.55232 63.46
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
S-BAL22 Ohara 1.568729 63.10486
L-PHL2 Ohara 1.5588 62.558541
BAL50 Ohara 1.559625 61.172671
S-BAL50 Ohara 1.559625 61.172671
L-PHL1 Ohara 1.56455 60.818065
BAL41 Ohara 1.563839 60.695914
S-BAL41 Ohara 1.563839 60.666575
BAL35Y Ohara 1.58913 61.233033
BAL35 Ohara 1.58913 61.182174
L-BAL35 Ohara 1.58913 61.152601
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