| Comparison of Theoretical calculation and simulation focusing positions of off-axis meta-lens with Different NA (Unit: um) | ||||
| Parameters | Off-axis angle α | Working wavelength λ (um) | Spectroscopic resolution (um) | Efficiency in focus |
|
| 13˚ | 1.55 | 0.4716 | 59.14% |
| 13˚ | 2.0216 | 29.32% | ||
|
| 20˚ | 1.55 | 0.3063 | 57.36% |
|
| 20˚ | 1.8563 | 34.86% | |
|
| 27˚ | 1.55 | 0.2263 | 55.42% |