What is another word for erecting prism?
Pronunciation: [ɪɹˈɛktɪŋ pɹˈɪzəm] (IPA) 
An erecting prism is an optical device that aligns an image right-side up. Synonyms for it include erect-image prism, right-angle prism, direct-vision prism, and porro prism. This device is essential in binoculars, telescopes, and other optical instruments. It works by reflecting light at a 90-degree angle, and its shape consists of two angled prisms that merge to form a rectangular block. An erecting prism typically has a multicoated glass, which prevents the loss of light and enhances the image clarity. It is an essential tool for amateur and professional astronomers, birdwatchers, and photographers who wish to capture stunning images.
