porro prism meaning in Hindi

Examples

1. It is a variant of the more common double Porro prism configuration.
2. Roof-prisms designs create an instrument that is narrower and more compact than Porro prisms.
3. Porro prism binoculars do not split beams and therefore they do not require any phase coatings.
4. Porro prisms binoculars occasionally need their prism sets to be re-aligned to bring them into collimation.
5. Porro prisms are most often used in pairs, forming a "'double Porro prism " '.
6. Porro prisms are most often used in pairs, forming a "'double Porro prism " '.
7. Galilean designs were widely used up to the end of the 19th century when they gave way to porro prism types.
8. An image travelling through a Porro prism is rotated by 180?and exits in the opposite direction offset from its entrance point.
9. Therefore, to reduce the cost of production for a porro prism, the edge of the roof is usually left out.
10. While a single porro prism can be constructed to work as well as a roof prism, it is seldom used as such.