K-BOC20 by Sumita
Obsolete
Very Rare
Environmentally Friendly
Refractive Index vs Wavelength
Refractive Index Calculator
dn/dλ vs Wavelength
dn/dλ Calculator
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Optical Properties
| Refractive Index (nd) | 2.0054 |
|---|---|
| Abbe Number (Vd) | 27.7 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36 — 1.55 µm |
$$n(\lambda) = \sqrt{3.84109 - 0.015801\,\lambda^2 + 0.0559834\,\lambda^{-2} + 0.00309051\,\lambda^{-4} - 0.00016656\,\lambda^{-6} + 2.77948 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 7.6 |
|---|---|
| TCE 100/300°C (10-6/K) | 8.5 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-3.96 \times 10^{-7} + 2(1.14 \times 10^{-8})\,\Delta T + 3(-3.48 \times 10^{-10})\,\Delta T^2 + \frac{1 \times 10^{-6} + 2(9.73 \times 10^{-10})\,\Delta T}{\lambda - 0.275}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.95 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 1 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| S-LAH79 | Ohara | 2.0033 | 28.27328 | |
| H-ZLAF92A | CDGM | 2.0033 | 28.275906 | |
| H-ZLAF92 | CDGM | 2.0033 | 28.316305 | |
| CAMOO4-E | Generic Birefringent | 2.002336 | 26.628162 | |
| TAFD55 | Hoya | 2.001 | 29.13 | |
| TAFD55-W | Hoya | 2.001 | 29.13 | |
| REALVIEW_2.0 | Schott | 2.001017 | 29.14 | |
| S-LAH99W | Ohara | 2.001 | 29.139473 | |
| S-LAH99 | Ohara | 2.001 | 29.139473 | |
| H-ZLAF91 | CDGM | 2.001 | 29.151347 |
Similar Glasses (Sumita)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| K-BOC30 | Sumita | 2.0068 | 26.2 | |
| K-PSFn202(M) | Sumita | 2.01365 | 21.4 | |
| K-PSFn202 | Sumita | 2.0196 | 21.5 | |
| K-PSFn202P | Sumita | 2.0216 | 21.4 | |
| K-PSFn203(M) | Sumita | 2.01105 | 20.8 | |
| K-PSFn203 | Sumita | 2.017 | 20.8 | |
| K-PSFn2 | Sumita | 2.0017 | 20.6 | |
| K-PSFn2(M) | Sumita | 1.9967 | 20.6 | |
| K-PSFn5 | Sumita | 1.9211 | 22.4 | |
| K-PSFn5(M) | Sumita | 1.91643 | 22.4 |