Table 2. Lens prescription of the achromatic objective.
| Notes | Radius (mm) | Thickness (mm) | Glass | 4th Order Aspheric Term | 6th Order Aspheric Term | 8th Order Aspheric Term |
|---|---|---|---|---|---|---|
| Object | 1.50000 | 0.046 | Seawater | |||
| Lens 1 | −0.29789 | 1.000 | E48R | |||
| −0.62850 | 0.025 | |||||
| Lens 2 | 1.13232 | 1.070 | PMMA | −0.095743 | 0.579417 | −1.044467 |
| −0.59716 | 0.050 | NOA61 | ||||
| Lens 3 | −0.54874 | 1.000 | Polystyrene | |||
| −2.26094 | 0.000 | −0.093718 | 0.831976 | −3.102985 | ||
| Stop | Infinity | 0.050 | ||||
| Lens 4 | 1.35360 | 1.080 | PMMA | −0.048849 | −0.026626 | |
| −0.78475 | 0.050 | NOA61 | ||||
| Lens 5 | −0.79370 | 2.012 | Polystyrene | |||
| −1.00743 | 0.025 | 0.392702 | −0.165720 | 0.183568 | ||
| Lens 6 | −2.31762 | 1.000 | E48R | |||
| 1.16361 | 0.286 | −0.860845 | ||||
| Image | Infinity |