What Is Diffuse Reflection?

Diffuse reflection is a phenomenon in which light projected on a rough surface is reflected in all directions. When a beam of parallel incident light hits a rough surface, the surface reflects the light in all directions, so although the incident rays are parallel to each other, the reflected light rays are randomly reflected in different directions due to the inconsistent normal directions of the points. This reflection is called "diffuse reflection" or "diffuse". This reflected light is called diffuse light. Many objects, such as plants, walls, clothes, etc., may appear rough on the surface, but if you look closely with a magnifying glass, you will see that the surface is uneven, so after the parallel sunlight is reflected by these surfaces, Diffuse in different directions.

Diffuse reflection refers to the phenomenon that light is irregularly reflected in all directions by a rough surface. Many objects, such as plants, walls, clothes, etc., may appear smooth on the rough surface, but if you look closely with a magnifying glass, you will see that the surface is uneven, so it was originally parallel

Diffuse reflected light refers to the light from the light source that enters the sample and returns to the surface of the sample after multiple reflections, refractions, scattering, and absorption. Diffuse reflected light is the light after analysis of interactions with molecules inside the sample, and carries rich sample structure and tissue information. Compared with diffuse transmitted light, although the transmitted light is also loaded with the structure and tissue information of the sample, the intensity of the transmitted light is affected by the thickness of the sample and the irregularity of the light path during transmission. Therefore, diffuse re-flectance Measurements are more direct and reliable in extracting sample composition and structure information.

Integrating sphere is one of the common accessories in diffuse reflection measurement. After the incident light enters the sample, part of the diffuse reflection light returns to the inside of the integrating sphere, and reaches the detector after multiple diffuse reflections in the integrating sphere. Because the signal light is emitted from the scattering layer and then integrated by the integrating sphere, it can overcome the influence of random factors in diffuse reflection measurement and improve data stability and repeatability.

Diffuse reflection also

Diffuse reflection experiment

This is an inquiry experiment. It is an important beginning for students' physical learning. It is necessary to guide students to learn how to carry out inquiry experiments and to allow students to experience the fun of physical inquiry. Compared with the eighth grade physics textbooks, the curriculum standards have reduced teaching. Requested by the original "

People measure the amount of light flux based on the principle of diffuse reflection. Various screens used to receive the real image formed by the optical system should be made of diffuse reflective surfaces with high diffuse reflectance. In the laboratory, the diffuse reflection surface of frosted glass is commonly used as an extended light source. In the cinema, people can see the screen on the screen from different seats, because the light forms a diffuse reflection on the screen. Cinema screens and projection screens are the most common examples of diffuse reflection in life.

People rely on the phenomenon of diffuse reflection to see objects from different directions. In environmental optics, the matte finish is often regarded as a uniform diffuse reflection surface, and the reverberation chamber for sound absorption material testing has sufficient diffusion to keep its wall surface to meet the diffuse reflection conditions.

The integrating sphere is a hollow sphere with a highly reflective inner surface. A high-efficiency device used to collect light scattering or emission from a sample inside or outside the sphere and near a window. A small window on the ball allows light to enter and get closer to the detector. The basic feature of the integrating sphere is one of the most common instruments in optics. The application of light energy is increasing in all aspects. For example, fiber optics, laser technology, photochemistry, and medical technology integrating spheres have been widely used in these fields, and are improving and replacing those optical systems with complicated structures and expensive prices. Because the inner surface of the integrating sphere has ultra-high reflection and scattering characteristics, it has a unique ability to receive and emit light. The irregular reflection of light on the uniformly distributed sphere wall enables the energy to be accurately measured. Because of the characteristics of the integrating sphere, changing its window position and geometric structure can obtain various applications. ^[1]