Knight Optical (UK) Ltd Right Angle Prism UV fused silica 6.25x6.25mm Uncoated PTF0600

Right angle prisms are simply triangular blocks of glass with two 45° and one 90° angles. These precision UV grade fused silica right angle prisms have high surface quality and tight tolerance angles. The normal use for a right-angle prism is to turn light through 90° by internal reflection from the hypotenuse. These right angle prisms are stocked as uncoated and protected on the hypotenuse to meet general applications. The simplest is a totally uncoated right angle prism; uncoated right-angle prisms will rely on total internal reflection and so is limited in the angular range it will reflect. If the hypotenuse can be coated with a standard reflecting coating, generally aluminium, which is then protected by a paint layer it will work over a wide range of incidence angles. These are commonly known as protected right angle prisms. These UV grade fused silica right angle prisms are used for wavelengths down to 175nm. Right angle prisms are generally used to bend light, reflect light and for image displacement.