ZF52 by CDGM
Obsolete
Rare
Environmentally Dangerous
ZF52 by CDGM is an obsolete optical glass with a rare melt frequency. It transmits from 0.36 to 2.40 µm with an nd of 1.846669 and a Vd of 23.827549. It has medium thermal expansion (CTE of 8.6×10⁻⁶/K), excellent chemical resistance, moderate relative cost, and dangerous environmental properties.
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) | 1.846669 |
|---|---|
| Abbe Number (Vd) | 23.827549 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.365 — 1.014 µm |
$$n(\lambda) = \sqrt{3.24264 - 0.00779546\,\lambda^2 + 0.0533809\,\lambda^{-2} + 0.00151154\,\lambda^{-4} + 7.22195 \times 10^{-5}\,\lambda^{-6} + 1.66027 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 8.6 |
|---|---|
| TCE 100/300°C (10-6/K) | 9.9 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[5.94 \times 10^{-6} + 2(2.59 \times 10^{-8})\,\Delta T + 3(-2.29 \times 10^{-10})\,\Delta T^2 + \frac{1.88 \times 10^{-6} + 2(1.39 \times 10^{-9})\,\Delta T}{\lambda - 0.284}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Mechanical Properties
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | — |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| FDS9 | Hoya | 1.846658 | 23.826345 | |
| SF57HTultra | Schott | 1.84666 | 23.83 | |
| SF57HT | Schott | 1.84666 | 23.83 | |
| SF57 | Schott | 1.84666 | 23.83 | |
| FDS90-SGP | Hoya | 1.84666 | 23.84 | |
| K-SFLDn3 | Sumita | 1.8467 | 23.8 | |
| K-SFLDn3W | Sumita | 1.8467 | 23.8 | |
| TIH53 | Ohara | 1.846659 | 23.780116 | |
| N-SF57 | Schott | 1.84666 | 23.78 | |
| N-SF57HT | Schott | 1.84666 | 23.78 |
Similar Glasses (CDGM)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| H-ZF52A | CDGM | 1.84667 | 23.791236 | |
| H-ZF52 | CDGM | 1.84666 | 23.784497 | |
| H-ZF52GT | CDGM | 1.84666 | 23.784497 | |
| H-ZF52TT | CDGM | 1.84666 | 23.784497 | |
| H-ZF71GT | CDGM | 1.8081 | 22.698087 | |
| H-ZF71 | CDGM | 1.8081 | 22.698087 | |
| ZF7 | CDGM | 1.806277 | 25.380144 | |
| H-ZF7LAGT | CDGM | 1.80518 | 25.456256 | |
| H-ZF7LA | CDGM | 1.80518 | 25.456256 | |
| ZF7L | CDGM | 1.80519 | 25.471232 |