SBAA217 July 2016 OPT8241 , OPT8320 , OPT9221
An example lens specification which works well for a 3D ToF system is shown in Table 1.
| Specification | Value | ||
|---|---|---|---|
| Sensor Format | Horizontal | 80 | pixels |
| Vertical | 60 | pixels | |
| Sensor Pixel size | Horizontal | 30 | um |
| Vertical | 30 | um | |
| Light Wavelength | 850 nm | ||
| Effect Focal Length (EFL) | 1.62 mm | ||
| F.No | 1.2 | ||
| Transmission efficiency | >85% @ 850 nm | ||
| >80% @ 835 nm to 870 nm | |||
| >70% @ 800 nm to 900 nm | |||
| Lens Total Length | <10.0 mm | ||
| View Angle | Horizontal (deg) | 75° | |
| Vertical (deg) | 57.4° | ||
| Diagonal (deg) | 90° | ||
| Resolution (MTF) | On Axis | > 70% contrast at 17 lp/mm | |
| Full Field | > 50% contrast at 17 lp/mm | ||
| TV distortion (Trad.) | < 10% | ||
| Relative Illumination (Ref.) | 70% | ||
| Chief Ray Angle | < 10% | ||
| Maximum Image Circle (MIC) | 3.6 mm | ||
| Back Focal Length | 1.0 mm | ||
| Barrel Thread Size | M12 × 0.5 | ||
Detailed information on each of these topics is freely available on the internet. This document deals only with the specifications important to the topic.