D-FK61A by CDGM
Preferred
Very Common
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) | 1.497 |
|---|---|
| Abbe Number (Vd) | 81.605419 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.302 — 2.325 µm |
$$n(\lambda) = \sqrt{1 + \frac{0.714812\,\lambda^2}{\lambda^2 - 0.0108371} + \frac{0.502985\,\lambda^2}{\lambda^2 - 0.00132156} + \frac{0.83612\,\lambda^2}{\lambda^2 - 153.361}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 12.6 |
|---|---|
| TCE 100/300°C (10-6/K) | 15.5 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-1.94 \times 10^{-5} + 2(2.54 \times 10^{-9})\,\Delta T + 3(-2.83 \times 10^{-11})\,\Delta T^2 + \frac{3.05 \times 10^{-7} + 2(-9.31 \times 10^{-11})\,\Delta T}{\lambda - 0.242}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.68 |
|---|---|
| Relative Cost | 14.0 |
Mechanical Properties
| Young's Modulus (GPa) | 73.67 |
|---|---|
| Poisson's Ratio | 0.297 |
| Knoop Hardness (kgf/mm²) | 360.0 |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | — |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Notes
anneal rate:4℃/h
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| N-PK52A | Schott | 1.497 | 81.61 | |
| FCD1 | Hoya | 1.497 | 81.61 | |
| FPL51 | Ohara | 1.496999 | 81.61466 | |
| N-PK52 | Schott | 1.497005 | 81.633263 | |
| M-FCD1 | Hoya | 1.4971 | 81.56 | |
| FCD1B | Hoya | 1.4971 | 81.56 | |
| S-FPL51 | Ohara | 1.496999 | 81.545888 | |
| MC-FCD1-M20 | Hoya | 1.4969 | 81.51 | |
| MP-FCD1-M20 | Hoya | 1.4969 | 81.51 | |
| K-PFK80 | Sumita | 1.497 | 81.5 |
Similar Glasses (CDGM)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| H-FK61B | CDGM | 1.497 | 81.605419 | |
| D-FK61 | CDGM | 1.497 | 81.611615 | |
| H-FK61 | CDGM | 1.497 | 81.612838 | |
| H-FK61GTI | CDGM | 1.497 | 81.612838 | |
| D-FK61A-25 | CDGM | 1.49665 | 81.549116 | |
| D-FK61-25 | CDGM | 1.49653 | 81.531772 | |
| H-FK55 | CDGM | 1.5502 | 75.224681 | |
| H-FK71 | CDGM | 1.4565 | 90.273821 | |
| H-FK71A | CDGM | 1.456498 | 90.470884 | |
| D-QK3L | CDGM | 1.48749 | 70.440487 |