FD15 by Hoya
Obsolete
Unknown
Environmentally Dangerous
FD15 by Hoya is an obsolete optical glass. It transmits from 0.36 to 1.55 µm with an nd of 1.698945 and a Vd of 30.050548. It has medium thermal expansion (CTE of 8.2×10⁻⁶/K), excellent chemical resistance, 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
Thermal Properties
| TCE -30/70°C (10-6/K) | 8.2 |
|---|---|
| TCE 100/300°C (10-6/K) | 85.0 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[6.08372 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | 0 |
| Acid Resistance | 1 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| H-ZF11 | CDGM | 1.69894 | 30.05045 | |
| ZF11 | CDGM | 1.698949 | 30.065686 | |
| SF15 | Schott | 1.69895 | 30.07 | |
| SF15 | Sumita | 1.69895 | 30.0 | |
| C99-30 | Corning | 1.699002 | 30.107427 | |
| PBM35 | Ohara | 1.698947 | 30.121211 | |
| S-TIM35 | Ohara | 1.698947 | 30.127865 | |
| N-SF15 | Schott | 1.69892 | 30.2 | |
| L-TIM28P | Ohara | 1.694529 | 30.655992 | |
| S-TIH20 | Ohara | 1.70585 | 30.244176 |