Right-Angle vs Porro vs Dove Prisms: How to Choose the Correct Optical Glass Prism
Right-Angle vs Porro vs Dove Prisms: How to Choose the Correct Optical Glass Prism Introduction If you are specifying optics for a laser system, a rangefinder, or a machine-vision camera, the prism choice often comes down to three geometries: right-angle, Porro, and Dove. Each one bends light differently, and each one solves a different problem. Pick the wrong one and you will fight image orientation, beam deviation, or alignment tolerances for the life of the project. This article compares the three prism types on the parameters that actually matter in production: deviation angle, image orientation, clear aperture, material options, and mounting complexity. We will also look at how they fit into real optical assemblies, from laser research to defense hardware. By the end, you should know which prism belongs on your drawing. Key Takeaways Right-angle prisms deviate a beam by 90° and are the simplest choice for folding optical paths in compact assemblies. Porro prisms use two re...