Concept
Unspecified telescope
| URI | http://vocab.nerc.ac.uk/collection/L22/current/TOOL1477/ | ||
|---|---|---|---|
| Within Vocab | SeaVoX Device Catalogue | ||
| Alternative Labels | Unspecified telescope | ||
| Definition | An optical device that renders distant objects more distinct by enlarging their images on a single retina of the observer. Consisting of various types such as spotting scopes, fieldscopes and monoculars, they are used for observation of distant objects on the Earth's surface. Reflected visible light is converged via an objective lens to magnify the view, which is initially inverted. An erect (non-inverted) image is achieved either by an erecting lens (long instrument) or a prism (compact instrument). Very small instruments may be of the Galilean type, which yields an erect image using a positive objective lens and a negative eyepiece lens. Terrestrial telescopes typically use objective lenses 50 to 100 mm in diameter with 20x or 30x eyepiece magnification but, this can vary. | ||
| Date | 2020-06-04T16:56:25 | ||
| Identifier | SDN:L22::TOOL1477 | ||
| Note | accepted | ||
| Has Current Version | 1 | ||
| version | 1 | ||
| inScheme | http://vocab.nerc.ac.uk/scheme/SDNDEV/current/ | ||
| Broader | L05:393 |
binoculars and terrestrial scopes | Mapping: 1603491 |
L19:SDNKG17 |
sensor_model | Mapping: 1697131 | |
| Related | B75:UNSPEC |
Unspecified | Mapping: 1603493 |
L35:MAN0001 |
unspecified | Mapping: 1603495 | |
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