Statements (9)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
Lens
|
| gptkbp:application |
astronomical telescopes
|
| gptkbp:feature |
reduced optical aberrations
aspheric surface |
| https://www.w3.org/2000/01/rdf-schema#label |
Chrétien lens
|
| gptkbp:inventedBy |
gptkb:Henri_Chrétien
|
| gptkbp:usedIn |
gptkb:Ritchey–Chrétien_telescope
|
| gptkbp:bfsParent |
gptkb:Hypergonar_lens
|
| gptkbp:bfsLayer |
7
|