What does the divergence of light mean?

The divergence of light refers to the measurement of the degree of focus of light after it exits from a light source. If the light is diffused, it shows that the focusing effect is weak and the light scattering degree is high. But if the light is concentrated, it means that the focusing effect is good and the light divergence is small. Most of the light we come into contact with in our daily life is adjusted by lens or optical equipment to reach the appropriate divergence and meet the daily use needs.

In the field of photography, the divergence of light is used to control the depth of field and the position of focus. If you want a soft background, you can shoot with a large aperture and low divergence. If you want to get a clear view, you need to use a small aperture and high divergence to keep the subject and environment in clear focus. Different degrees of light divergence will produce different shooting effects, and photographers need to flexibly use various parameters according to the shooting theme and the needs of framing.

In the fields of industry and science, the divergence of light also plays an important role. For example, in the field of laser cutting and medical treatment, it is necessary to use high-precision laser to operate, so it is necessary to adjust the divergence of laser to ensure that it can focus on a specific area. At the same time, in the field of optical research, it is also necessary to accurately control the divergence of light to study the interaction between light and matter. In a word, the divergence of light is of great significance to many fields, and accurate measurement and control can ensure the quality of research and production in various fields.