| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Equi-angular lens | Physics | A prismatic lens obtained by the rotation of an equi-angular profile about the optical axis of the lens. In such a lens, the bulls eye and rings usually present a continuous convex surface towards the source. Source: European Union. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
