C3 by Hoya
Obsolete
Unknown
Environmentally Dangerous
C3 by Hoya is an obsolete optical glass. It transmits from 0.30 to 0.70 µm with an nd of 1.518234 and a Vd of 58.96082. It has medium thermal expansion (CTE of 9.2×10⁻⁶/K), good 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
| Refractive Index (nd) | 1.518234 |
|---|---|
| Abbe Number (Vd) | 58.96082 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.25 — 1.55 µm |
$$n(\lambda) = \sqrt{2.27432 - 0.00956343\,\lambda^2 + 0.0103635\,\lambda^{-2} + 0.000603516\,\lambda^{-4} - 5.14678 \times 10^{-5}\,\lambda^{-6} + 2.65072 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 9.2 |
|---|---|
| TCE 100/300°C (10-6/K) | — |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-1.39118 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Chemical Resistance
| Climatic Resistance | 3 |
|---|---|
| Stain Resistance | 1 |
| Acid Resistance | 1 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| NSL3 | Ohara | 1.518229 | 58.966406 | |
| H-K10 | CDGM | 1.51818 | 58.949331 | |
| K3 | Schott | 1.51823 | 58.976559 | |
| K3 | Sumita | 1.51823 | 59.0 | |
| S-NSL3 | Ohara | 1.518229 | 58.902057 | |
| H-K51 | CDGM | 1.52307 | 58.639792 | |
| B270 | Schott | 1.52308 | 58.571369 | |
| N-K5 | Schott | 1.52249 | 59.48 | |
| H-K50 | CDGM | 1.52249 | 59.480754 | |
| K5 | Schott | 1.522489 | 59.482671 |
Similar Glasses (Hoya)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| E-C3 | Hoya | 1.51823 | 58.96 | |
| C12 | Hoya | 1.523073 | 58.640203 | |
| C5 | Hoya | 1.522488 | 59.447258 | |
| BACL3 | Hoya | 1.518351 | 60.396486 | |
| C40 | Hoya | 1.523 | 60.4016 | |
| BACL1 | Hoya | 1.526417 | 60.113677 | |
| C7 | Hoya | 1.511122 | 60.485929 | |
| C2 | Hoya | 1.51602 | 56.771193 | |
| ZNC1 | Hoya | 1.533149 | 58.063515 | |
| ZNC7 | Hoya | 1.508471 | 61.266087 |