ASMO Science Olympiad 2017 — Level 3 (Years 7, 8 & 9) Question 15
ASMO Science · ASMO Science Olympiad 2017 — Level 3 (Years 7, 8 & 9)
In Porro prism binoculars, Porro prisms are most often used in pairs forming a double Porro prism. A second prism is rotated 90 with respect to the first prism, such that the beam will traverse both prisms.What could be the possible reason behind using the double Porro prism in binoculars?
Double prism alters the direction of the inverted image
Since the image is reflected twice, the image gets inverted.
Two reflections provide a clear image of the object.
The net effect of the prism system is the image rotated by 360