D-PK3 by CDGM
Standard
Rare
Precision Molding
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) | 1.525 |
|---|---|
| Abbe Number (Vd) | 70.370578 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.302 — 2.325 µm |
$$n(\lambda) = \sqrt{1 + \frac{0.631689\,\lambda^2}{\lambda^2 - 0.0127792} + \frac{0.666896\,\lambda^2}{\lambda^2 - 0.00313928} + \frac{0.874645\,\lambda^2}{\lambda^2 - 90.1741}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 8.1 |
|---|---|
| TCE 100/300°C (10-6/K) | 9.8 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-3.49 \times 10^{-6} + 2(1.52 \times 10^{-8})\,\Delta T + 3(-7.04 \times 10^{-11})\,\Delta T^2 + \frac{4.13 \times 10^{-7} + 2(3.57 \times 10^{-10})\,\Delta T}{\lambda - 0.131}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 2.65 |
|---|---|
| Relative Cost | 25.5 |
Mechanical Properties
| Young's Modulus (GPa) | 70.71 |
|---|---|
| Poisson's Ratio | 0.235 |
| Knoop Hardness (kgf/mm²) | 447.0 |
Chemical Resistance
| Climatic Resistance | 2 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | — |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Notes
anneal rate:4℃/h
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| K-PMK30 | Sumita | 1.525 | 70.4 | |
| K-PMK30(M) | Sumita | 1.52002 | 70.2 | |
| PK50 | Schott | 1.52054 | 69.712402 | |
| PCS1 | Hoya | 1.517284 | 69.67869 | |
| APL1 | Ohara | 1.517277 | 69.563209 | |
| S-APL1 | Ohara | 1.517277 | 69.563209 | |
| S-APL | Ohara | 1.517277 | 69.56319 | |
| K-PG325 | Sumita | 1.5067 | 70.5 | |
| QUARTZ | Generic Birefringent | 1.544296 | 70.132045 | |
| K-PG325(M) | Sumita | 1.50506 | 70.4 |
Similar Glasses (CDGM)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| D-PK3-25 | CDGM | 1.52368 | 70.274839 | |
| H-QK3LGTI | CDGM | 1.48749 | 70.440487 | |
| H-QK3L | CDGM | 1.48749 | 70.440487 | |
| D-QK3L | CDGM | 1.48749 | 70.440487 | |
| D-QK3L-25 | CDGM | 1.48687 | 70.417086 | |
| H-K2 | CDGM | 1.50047 | 66.020774 | |
| H-QK30GTI | CDGM | 1.48217 | 70.299764 | |
| H-FK55 | CDGM | 1.5502 | 75.224681 | |
| D-ZPK7-25 | CDGM | 1.56854 | 71.235367 | |
| H-ZPK7 | CDGM | 1.56907 | 71.304254 |