Did You know?
Named after its inventor, Heinrich Wilhelm Dove, the Dove prism is a type of reflective prism used to invert an image. Dove prisms are shaped from a truncated right-angle prism. When a beam of light passes through the prism, it undergoes total internal reflection. While images passing through the prism will rotate 180 degrees, the image will be inverted, however, not laterally transposed. Additionally, Dove prisms have a unique property - as they are rotated along their longitudinal axis, the resulting transmitted image rotates at twice the rate of the prism. Because of this characteristic, Dove prisms are commonly used in beam rotators, which find applications in fields like interferometry, astronomy, and pattern recognition.