Lighting Knowledge: What are the different types of light transmission?

(1) Rule transmission
When light shines on transparent materials, the transmitted light undergoes directional transmission with strong directionality according to the laws of geometric optics, which is called regular transmission.
(2) Diffuse transmission
When light passes through a rough surface transmissive material (such as frosted glass), the transmitted light disperses and there is no regular transmission at the macroscopic level, which is called diffuse transmission.
If light shines on a transparent material with good diffusivity (such as milky white glass, etc.), the transmitted light will spread out in all directions and be evenly distributed throughout the entire hemisphere space. At this point, the brightness will be the same in all directions, which is called isotropic diffuse transmission (formerly known as uniform diffuse transmission).
(3) Mixed transmission
The situation where light shines on a transmissive material and its transmission performance is between regular transmission and diffuse transmission (or diffuse transmission) is called mixed transmission.
When light reaches the surface of a glass curtain wall, both reflection and transmission physical reactions occur simultaneously.