Table 3.
Optical properties of squid visual system.
| Species | Focal length (μm) | Aperture (μm) | Receptor diameter (μm) | Receptor length (μm) | Absorption coefficient | Absolute sensitivity |
|---|---|---|---|---|---|---|
| I. notoides | 740 | 580 | 4 | 200 | 0.0067 | 4.78 |
| S. lessoniana | 3,800 | 3,100 | 4 | 250 | 0.0067 | 5.34 |
| A. falco | 2,090 | 1,480 | 4 | 240 | 0.0067 | 3.96 |
| P. margaritifera | 3,510 | 2,930 | 4 | 210 | 0.0067 | 5.19 |
| S. spirula | 5,190 | 4,330 | 4 | 170 | 0.0067 | 4.67 |
| L. reinhardti | 5,770 | 4,560 | 4 | 150 | 0.0067 | 3.91 |
| B. abyssicola | 1,836 | 1,530 | 4 | 600 | 0.0067 | 6.73 |
| Humana (cone) | 16,700 | 2,000 | 2 | 30 | 0.035 | 0.02 |
| (Rod) | 8,000 | 20 | 30 | 0.035 | 36.81 |
a
The optical properties of human from Land (1981).