focal length
A measure of how strongly an optical system converges or diverges light, the inverse…A measure of how strongly an optical system converges or diverges light, the inverse of optical power. In the simple case of a single convex lens, it is the distance along the optical axis from the principal plane of the lens to the lens's focal point (where, for instance, the film would be placed in a camera). For more complex or multi-element optical systems, focal length need not correspond to any obvious measurable physical distance.
Meaning
1 sensesA measure of how strongly an optical system converges or diverges light, the inverse of optical power. In the simple case of a single convex lens, it is the distance along the optical axis from the principal plane of the lens to the lens's focal point (where, for instance, the film would be placed in a camera). For more complex or multi-element optical systems, focal length need not correspond to any obvious measurable physical distance.
Brennweite
фо́кусное расстоя́ниеfókusnoje rasstojánije
- the distance from a lens to its focus
Translations
5 languagesBy meaning 1
By meaning 1
Forms
plural: focal lengths| Singular | focal length |
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regular
Synonyms
1 synonyms- the distance from a lens to its focus:focal distance
See also
neighbours in the dictionaryDictionary text adapted from Wiktionary (Wiktionary contributors, CC BY-SA 4.0) and Open English WordNet / Princeton WordNet (CC BY 4.0, WordNet License); shared under CC BY-SA 4.0. Example sentences and recordings are credited where they appear.