Diffuse reflection is a phenomenon in which light projected on a rough surface reflects in all directions. When a parallel incident light ray hits a rough surface, the surface will reflect the light in all directions. Although the incident rays are parallel to each other, the normal direction of each point is inconsistent, causing the reflected light to reflect irregularly in different directions. This reflection is called "diffuse reflection" or "diffuse".
The surface of many objects, such as plants, walls, clothes, etc., seems to be smooth, but if you look closely with a magnifying glass, you will see that the surface is uneven, so the originally parallel sunlight is reflected by these surfaces. Diffuse into different directions
When a beam of parallel light touches the surface of a smooth object, the light rays are regularly reflected, and the reflected light rays are also parallel to each other. This regular reflection is called one-way reflection or specular reflection of light. However, the smoothness of the object is relative, and the surface of the general object is rough and uneven. Although the incident rays are parallel rays, the reflected rays are scattered in various directions. This phenomenon is diffuse reflection of light.
The reason why the human eye can see the whole picture of an object mainly depends on the imaging of diffuse reflected light in the eye. If the surface of the object is all one-way reflection, not only can not see the appearance of the object, but also cause glare interference in a certain direction.
RCM430 Flash Mirror Photo Booth applies the principle of diffuse reflection when we designed the reflector, so it can help to expand the range of strobe source to bring better shooting effect.