The propagation characteristics of light waves in transparent minerals are as follows: When a light wave of a specific frequency propagates in a homogeneous body, its propagation speed does not change due to the difference in the direction of vibration of the light wave in the crystal, and the refractive index value is only one. Only a single refraction phenomenon occurs when light waves are incident into the homogeneous body, and the vibration characteristics and vibration direction of the incident light wave are not substantially changed. That is to say, after the natural light is incident on the homogeneous body, it is still substantially natural light; after the polarized light is incident on the homogeneous body, it is still polarized, and its vibration direction does not change substantially. When a light wave of a specific frequency propagates in a heterogeneous body, its propagation speed changes as the direction of vibration of the light wave in the crystal changes. Therefore, the refractive index value of the heterogeneous body also changes with the direction of vibration of the light wave in the crystal, that is, there are many refractive index values ​​of the heterogeneous body. When a light wave is incident on a heterogeneous body, birefringence occurs in addition to a special direction, and two polarized lights having different vibration directions, different propagation speeds, and different refractive index values ​​are formed. The difference between the refractive index values ​​of the two polarized lights is called birefringence. When the incident light wave is natural light, the heterogeneous body can change the vibration characteristics of the incident light wave. When the incident light wave is polarized, the vibration direction of the incident light wave can also be changed. When the light wave is incident along the special direction of the heterogeneous body (such as along the z-axis direction of the intermediate crystal group crystal), birefringence does not occur, and the vibration characteristics and vibration direction of the incident light wave are not substantially changed. This particular direction in the heterogeneous body is called the optical axis. The intermediate crystal crystal has only one optical axis direction, which is called a monoaxial crystal; in the lower crystal crystal, there are two optical axis directions, which are called biaxial crystals. Some of the optical properties of transparent mineral flakes under polarized light microscopes are closely related to the direction of vibration of the light waves in the crystal and the corresponding refractive index values. In order to reflect the relationship between the direction of vibration of the light wave and the corresponding refractive index value when the light wave propagates in the crystal, we use the concept of the light body in physics. XUANLIN CNC for high quality, affordable industrial metal cutting Fiber Lasers, with our vast industrial laser cutting knowledge and affordable range of cutting Laser Machine, XUANLIN CNC is the perfect Cnc Machinery partner for all your needs. Our Range Of Fiber Laser Cutting Machine is fully tested and assembled to rigorous standards at our huge 32,000 square feet facility in JINAN CITY in the middle of Shandong Province. Each of our models of fibre laser are suitable for a wide range of industry applications and products. Fiber Cnc Laser Cutting Machine,Fiber Laser Cutting Machine,Fiber Laser Metal Cutting Machine,Fiber Laser Machine JINAN XUANLIN MACHINERY CO., LTD. , https://www.cncfiberlasers.com
Propagation of light in homogeneous and heterogeneous bodies
According to its optical properties, substances can be divided into two categories: homogeneous and heterogeneous. The optical properties of equiaxed minerals and amorphous materials are the same in all directions, called photo-homogeneous bodies, referred to as homogeneous bodies. The optical properties of minerals of intermediate and low-order crystals vary with direction and are called optical heterogeneous bodies, referred to as heterogeneous bodies. The vast majority of minerals are heterogeneous and are the focus of our research. Because minerals are transparent and opaque under the illumination of light, the transparent minerals are mainly to observe the characteristics of light propagation in minerals. The research in this area is relatively mature.