| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| handbook of optical design | 0.91 | 0.3 | 6354 | 87 | 26 |
| handbook | 0.62 | 1 | 1843 | 7 | 8 |
| of | 0.46 | 0.8 | 7924 | 94 | 2 |
| optical | 1.86 | 0.7 | 1537 | 4 | 7 |
| design | 0.64 | 1 | 4065 | 76 | 6 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| handbook of optical design | 1.65 | 0.9 | 5582 | 63 |
