Table 4. Afocal relay and fundus imaging lens optical tolerances.
| Group | Surface |
Radius
(%) |
Thickness (µm) | Wedge TIR* (µm) |
Irregularity
(waves) |
Material
(Index, Abbe #) |
|---|---|---|---|---|---|---|
| Afocal relay | 1-3 | 0.2/0.2/0.2 | 200/200 | 25/25 | 1.5/1.5/1.0 | 0.001, 0.8% |
| 4-6 | 0.2/0.2/0.2 | 200/200 | 25/26 | 2.0/2.0/.20 | 0.001, 0.8% | |
| 7-9 | 0.2/0.2/0.2 | 200/200 | 26/26 | 2.0/2.0/.20 | 0.001, 0.8% | |
| 10-12 | 0.2/0.2/0.2 | 200/200 | 26/26 | 2.0/2.0/.20 | 0.001, 0.8% | |
| Fundus imaging lens | 1-2 | 0.05/0.24 | 30 | 5 | 0.6/0.6 | 0.0005, 0.5% |
| 3-5 | 0.15/0.17/0.25 | 20/20 | 3/3 | 0.9/0.5/0.5 | 0.0005, 0.5% | |
| 6-9 | 0.24/0.13/0.18 | 22/25 | 3/4 | 0.4/0.5/0.5 | 0.0005, 0.5% | |
| 10-11 | 0.25/0.25 | 25 | 4 | 0.8/0.4 | 0.0005, 0.5% | |
* TIR is wedge as measured by total indicated runout.