BSL7 by Ohara

Obsolete Unknown Environmentally Dangerous

BSL7 by Ohara is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.51633 and a Vd of 64.150145. It has medium thermal expansion (CTE of 7.4×10⁻⁶/K) and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.334–2.325 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.334–2.325 µm
Abbe Number Calculator
Transmission vs Wavelength

No transmission data available.

Transmission Calculator
Valid wavelength range: 0.334–2.325 µm
Optical Properties
Refractive Index (nd) 1.51633
Abbe Number (Vd) 64.150145
Dispersion Formula Schott
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{2.26977 - 0.00963952\,\lambda^2 + 0.0110255\,\lambda^{-2} + 7.94651 \times 10^{-5}\,\lambda^{-4} + 1.0121 \times 10^{-5}\,\lambda^{-6} - 4.40967 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.4
TCE 100/300°C (10-6/K) —
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) —
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
BK7HT Schott 1.51633 64.14348
K-BK7 Sumita 1.51633 64.1
BK7 Sumita 1.51633 64.1
BK7 Schott 1.5168 64.167336
N-BK7HTSultra Schott 1.5168 64.17
N-BK7HT Schott 1.5168 64.17
N-BK7HTi Schott 1.5168 64.17
N-BK7 Schott 1.5168 64.17
H-K9LAGT CDGM 1.5168 64.198695
H-K9LA CDGM 1.5168 64.198695
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
S-BSL7 Ohara 1.51633 64.142022
L-BSL7 Ohara 1.51633 64.065129
BSL7Y Ohara 1.51633 64.243778
S-BSL7R Ohara 1.51633 63.881689
BSL22 Ohara 1.518206 65.039654
BSL1 Ohara 1.510091 63.635037
BSL3 Ohara 1.498308 65.026785
BSL21 Ohara 1.503779 66.814545
NSL7 Ohara 1.511121 60.485793
S-NSL5 Ohara 1.522494 59.835417
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