First order Fresnel lens (original)
GPTKB entity
Statements (18)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
Lens
|
| gptkbp:category |
astronomer
maritime navigation equipment |
| gptkbp:diameter |
approximately 2.59 meters
|
| gptkbp:height |
920 mm
approximately 2.74 meters |
| https://www.w3.org/2000/01/rdf-schema#label |
First order Fresnel lens (original)
|
| gptkbp:introducedIn |
1823
|
| gptkbp:inventedBy |
gptkb:Augustin-Jean_Fresnel
|
| gptkbp:location |
gptkb:Pigeon_Point_Lighthouse
gptkb:Cape_Hatteras_Lighthouse |
| gptkbp:material |
gptkb:glass
|
| gptkbp:order |
first
|
| gptkbp:purpose |
to focus light for navigation
|
| gptkbp:usedIn |
lighthouses
|
| gptkbp:bfsParent |
gptkb:Montauk_Lighthouse
gptkb:Montauk_Point_Lighthouse |
| gptkbp:bfsLayer |
6
|