Table 6. Fixation objective lens specifications.
| Specification | Value |
|---|---|
| F/# | 4.5 |
| Full field of view | 12.2° (32.2° @ eye) |
| Focal length | 17.9 mm |
| Spectral bandwidth | 455, 525, & 625 nm (equal relative weights) |
| Working distance | > 25 mm |
| Working distance to prism | > 3.5 mm (see Fig. 7) |
| Telecentricity | < 1° |
| Performance at all field angles & wavelengths | < λ/14 RMS wavefront @ 0 D < λ/10 RMS wavefront as-built @ 0 D < λ/14 RMS wavefront from −20 to +10 D |
| Ocular aberration correction | The residual aberrations from the afocal relay should be corrected. |
| Light Source | Texas Instruments DLP LightCrafter Display 3010 EVM |
| DMD | 0.3 720p 6.9 x 3.9 mm (5.4 μm micro-mirror pitch) |