H-K90GTI by CDGM
Standard
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) | 1.51948 |
|---|---|
| Abbe Number (Vd) | 63.291634 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.302 — 2.325 µm |
$$n(\lambda) = \sqrt{1 + \frac{1.15679\,\lambda^2}{\lambda^2 - 0.00700648} + \frac{0.960975\,\lambda^2}{\lambda^2 - 100.982} + \frac{0.121869\,\lambda^2}{\lambda^2 - 0.0249554}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 7.8 |
|---|---|
| TCE 100/300°C (10-6/K) | 9.4 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-7.71 \times 10^{-7} + 2(1.65 \times 10^{-8})\,\Delta T + 3(-4.14 \times 10^{-11})\,\Delta T^2 + \frac{4.54 \times 10^{-7} + 2(4.64 \times 10^{-10})\,\Delta T}{\lambda - 0.177}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 2.52 |
|---|---|
| Relative Cost | 50.5 |
Mechanical Properties
| Young's Modulus (GPa) | 80.22 |
|---|---|
| Poisson's Ratio | 0.214 |
| Knoop Hardness (kgf/mm²) | 544.0 |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | — |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Notes
i line glass
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| BK7G18 | Schott | 1.51975 | 63.58 | |
| P-BK40 | Sumita | 1.5176 | 63.5 | |
| K-PBK40 | Sumita | 1.5176 | 63.5 | |
| BK8 | Schott | 1.520152 | 63.685744 | |
| K-PBK40(M) | Sumita | 1.51497 | 63.3 | |
| S-BSL7R | Ohara | 1.51633 | 63.881689 | |
| P-BK7 | Schott | 1.5164 | 64.06 | |
| L-BSL7 | Ohara | 1.51633 | 64.065129 | |
| K-BK7 | Sumita | 1.51633 | 64.1 | |
| BK7 | Sumita | 1.51633 | 64.1 |
Similar Glasses (CDGM)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| D-K59 | CDGM | 1.5176 | 63.499991 | |
| D-K59-25 | CDGM | 1.51698 | 63.4085 | |
| D-K9GT-25 | CDGM | 1.51577 | 63.989637 | |
| D-K9-25 | CDGM | 1.51577 | 63.989637 | |
| D-K9GT | CDGM | 1.51633 | 64.058952 | |
| D-K9 | CDGM | 1.51633 | 64.058952 | |
| H-K9LA | CDGM | 1.5168 | 64.198695 | |
| H-K9LAGT | CDGM | 1.5168 | 64.198695 | |
| H-K9L* | CDGM | 1.5168 | 64.198732 | |
| H-K9LGT | CDGM | 1.5168 | 64.198732 |