Astigmatism (Shan Guang) is a very common optical phenomenon, which refers to the fact that after light rays are transmitted from one or more light sources to an object, they are reflected and transmitted through the surface of the object to form a number of new rays, which are each emitted in all directions and leave the object. Astigmatism is important in all aspects of our daily lives, such as in the fields of lighting, visual arts, optical instruments, etc. This article will explain the basic principles and types of astigmatism, as well as its applications in different fields.
Rationale
The basic principle of astigmatism is the dispersion of light. When light enters an object, it encounters surface features such as microscopic support and Slovenia Telemarketing Data comb structure on the object's surface. These surface features cause the direction of the light rays to change, resulting in the formation of multiple new rays. The direction of these new rays is related to the location of the emitting point, and usually presents beams in all directions. This phenomenon is called astigmatism.
type
The type of astigmatism mainly depends on the optical properties of the object. In general, the astigmatism properties of objects can be divided into two categories: local astigmatism and global astigmatism.
Partial astigmatism: In partial astigmatism, the dispersion of light mainly occurs in a localized area of the surface of an object. This type of astigmatism usually occurs when there are large changes in the surface of the object, such as concave, height, and bending. For example, a beam of light is cast on a smooth stretch of water, often forming a column of light, which is a typical example of localized astigmatism.
Global astigmatism: In global astigmatism, the dispersion of light rays occurs mainly on the object as a whole. This type of astigmatism usually occurs when the optical properties of the surface of an object are close to the same, such as a glossy transparent object. For example, on a sunlit beach, the surface of the sand grains emits a variety of glows, which is a typical example of global astigmatism.
Apps
Lighting
Astigmatism is used in a wide range of lighting applications. By controlling the direction and effect of astigmatism, designers can create a variety of different light environments to provide appropriate lighting for different scenes. For example, in a movie scene, different light sources such as sunlight and artificial lights can be simulated by controlling astigmatism; In interior design, by adjusting the position and orientation of the lighting fixtures, a variety of different light effects can be created, such as soft shadows, wide field of view, etc.
Visual Arts
In the field of visual arts, astigmatism also plays an important role. Artists can express their emotions and thoughts through the control of light.