Amici prisms, also called “right angle roof prisms,” revert and invert the image as well as bend the line of sight through a 90°angle. Ideal for use in spotting scopes, and any optical instrument where it is desirable to take an inverted image from an objective, turn it right side up, and bend it through a 90° angle in order to maintain the correct visual orientation.
These prisms are fabricated from N-BK7, UV fused silica, etc
They can be AR coated on the incidence face.