A type of Prism designed by G.B.Amici.
Consist of a roof edge produced upon the long reflecting face (the hypotenuse) of a right-angle prism.
Invert the deflect beam through 90 degree. The right angle deflection and image erection.
Used as an erecting system in elbow and panoramic telescopes, terrestrial telescopes , viewing systems and rangefinders .
Manufacturing Tolerances
Attribute |
Commercial standard |
Precision Standard |
Material |
BK7, fine annealed |
BK7, fine annealed |
Beam Deflection |
90°±5' |
90°±3', 90°±2',90°±1' |
Dimensional |
±0.25 mm |
±0.15 mm |
Center Thickness (t) |
± 0.25 mm |
± 0.15 mm |
Cosmetics (Scratch-dig) |
80-50,60-40 |
20-10,10-5 |
Roof Angle |
±3',±1' |
±30',±5',±3' |
Edges |
Fine ground and beveled |
Fine ground and beveled |
Clear Aperture |
90% Reflecting |
90% Reflecting |
Coating |
See attached coating chapter |
See attached coating chapter |
 |
 All dimensions are in mm unless otherwise specified.
Different material, sizes, tolerance and coating are available upon request. |
