pentaprism

/pen-tuh-priz-uhm/US // ˈpɛn təˌprɪz əm //UK // (ˈpɛntəˌprɪzəm) //

五棱镜,五角星主义,五角大楼,五角星

Definitions

n.名词 noun

1
- : a prism that has five faces, a pair of which are at 90° to each other; a ray entering one of the pair emerges from the other at an angle of 90° to its original direction: used especially in single-lens reflex cameras to reverse images laterally and reflect them to the viewfinder.