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Optical Prisms
Beamsplitter cubes is formed by coating on the hypotenuse of right angle prism, then cementing a same right angle prism, which can avoid astigmatism of the flat beam splitter.
Powell lenses are optical marking prisms that allow laser beams to pass through and be optimally drawn into a straight line with uniform optical density, good stability.
Corner cube prism, also known as a retroreflector, regardless of the angle of incidence, the reflected light is always parallel to the incident light.
Porro prism is composed of incoming and outgoing surfaces and two mutually perpendicular right angle reflecting surfaces.
Dove prism is an image rotator, the image is inverted 180° after the light passes through this prism.
Right angle prisms are usually used to bend the optical path or deflect the image formed by the optical system by 90°.