Definition of roof prism in English:

roof prism

Line breaks: roof prism

noun

1A reflecting prism in which the reflecting surface is in two parts that are angled like the two sides of a pitched roof. Compare with Porro prism.
More example sentences
  • Modern roof prism designs are capable of performance just as good as a comparable porro prism design, due to current technology such as phase coating and improved reflective backing materials on the prisms.
1.1 (roof prisms) (also roof-prism binoculars) A pair of binoculars using two roof prisms, resulting in an instrument with parallel sides and objective lenses that are the same distance apart as the eyepieces.
More example sentences
  • Zeiss pioneered many products and technologies we take for granted, such as roof-prism binoculars and anti-reflective lens coatings.
  • Focusing is similar to a traditional roof prism binocular with the right ocular adjustable and a center focus knob.

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Word of the day middlescent
Pronunciation: ˌmidlˈesənt
adjective
middle-aged, but still maintaining youthful interests and activities