An angle lens is a type of optical device that can be used to change or manipulate light rays in order to create specific visual effects. It consists of two pieces of glass, one flat and one curved, which are cut at different angles so as to refract the incoming light in such a way that it creates an image on a screen or other surface.
Angle lenses can be used for various purposes including magnification, reduction, distortion, reflection, and dispersion of light rays. They work by bending the light rays at different angles depending on the shape and curvature of the two pieces of glass, which in turn alters the direction, size or intensity of the image being projected.
In summary, an angle lens is a versatile tool that can be used to manipulate light in order to create desired visual effects, making it useful for various applications such as photography, cinematography, and projection systems.