| 释义 |
Definition of Porro prism in English: Porro prismnoun ˈpɒrəʊ 1A reflecting prism in which the light is reflected on two 45° surfaces and returned parallel to the incoming beam. Compare with roof prism Example sentencesExamples - Bushnell's latest couples a waterproof 8x36 porro prism center-focus binocular with a laser rangefinder.
- While not as sexy as a roof prism, the porro prism is a dependable unit made for the outdoors.
- In binoculars, it has added porro prisms to its line.
- 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.
- Two porro prism binocular models are new, the 8x42 mm and the 10x42 mm.
- 1.1 A pair of binoculars using two Porro prisms at right angles, resulting in a conventional instrument with objective lenses that are further apart than the eyepieces.
Origin Named after the Italian scientist Ignazio Porro (1801–75). |