Precautions for cutting with fiber laser The polarizer is an additional lens

by:Crylight     2021-05-15

Some important things to consider when using fiber laser cutting. The first is eye protection. The wavelength of the light emitted by the fiber laser system is harmful to the eyes, so eye protection measures must be taken. Since this technology has only been available for less than 5 years, it is strongly recommended to conduct comprehensive training on proper system operation and safety. Many operators do not have cutting experience using fiber laser cutting, so the lack of experience should be compensated by good initial training in operating the fiber cutting system.

   Another thing to pay attention to is the material to be cut. Although fiber laser cutting is good at cutting most materials, it cannot be used to cut acrylic or polycarbonate materials, and can only cut wood or fiber materials in limited applications. At the same time, the thickness of the material to be cut is an important factor in determining when to use fiber laser cutting. Thicker materials require more power to cut. In these cases, laser cutting may not be a good choice for lens design.

   At this time, you can just use the function of installing the fiber laser next to the plasma cutting head. Before switching to plasma cutting quickly and easily, operators can use fiber lasers to cut thinner materials that require tight tolerances. You can even use 2 different cutting methods to cut the same part. For example, an operator can choose to use plasma to cut the outside of a part, and then use a fiber laser to cut the internal shape.

  Finally, it is best to consider the parts required for the comprehensive laser cutting setup and how to purchase each part. A system equipped with laser power supply, gas operating table, laser cutting head, height controller, numerical control (CNC) and cutting control program will realize the valuable benefits of an integrated solution. With integrated solutions, the process of purchasing and integrating fiber laser systems becomes less complicated. The laser lens considers to filter out the cutting parameters that have been determined in advance, and optimizes the system dedicated to cutting, so as to start cutting immediately after turning on the power.

   Polarizer is an additional lens attached to the camera lens that can eliminate or partially eliminate polarized light. Polarizers are generally made of polyvinyl alcohol film processed by iodine dip dyeing and glued between two sheets of flat optical glass. It allows linearly polarized light in the same direction of polarization to pass through about 80% of the light intensity, while linearly polarized light that vibrates perpendicular to its polarization direction can only pass less than 1%.

  The color of the polarizer mirror is close to black, and the outer edge of the lens can be rotated. It consists of a lens body and a rear seat frame that is connected to it and can be rotated. The main body of the lens is made up of extremely fine crystal glass. When rotating, this grating will block polarized light that is not parallel to it. Therefore, the polarizer can control and select the amount of reflected light parallel to it recorded on the film (the reflected light of the high-power laser mirror group is polarized light).

   Polarizer is also a widely used additional lens. Its function is to effectively reduce or eliminate the reflection of non-metallic surfaces. The polarizer can be used in both black and white and color photography, because it can reduce the brightness of the light, so its appearance is gray.

   Polarizers are often used in the following occasions: eliminate or reduce the surface reflection of smooth objects; darken the sky tone; two stacked to replace the gray filter; and improve the color Image saturation, contrast enhancement, etc. For example, when shooting a water surface or a scene inside a glass showcase, a polarizer can be used to eliminate the reflection on the surface, and the outer edge of the lens can be rotated during use until the reflection on the surface of the scene is invisible. There is also a big contrast between bright and dark on the seaside or outdoors where the sun is shining. You can use it to reduce the over-brightness part, so that the light and dark parts of the picture can get a proper balance.

   Although the polarizer is the most valuable filter in digital photography, it is not a panacea. When the polarizer removes large-area reflections, it also changes the light ratio of each part of the picture, so the color tone of the picture taken with the polarizer will have some changes. For some scenes, whether to use a polarizer depends on the specific needs of the individual. When the reflective highlights account for a large proportion of the screen, the use of a polarizer will affect the color tone of other parts of the screen; if the shooting scene has a small proportion of the reflective highlights, there will be basically no change in the color tone of other parts of the screen In the case, increase the local color saturation.

   Under certain lighting conditions, the content of polarized light is very small. At this time, using a polarizer will not have the expected effect. At the same time, due to the increase of optical lenses in the optical path, it will The picture quality of the picture has a negative effect. At the same time, since the polarizer has a rotating part and has a large thickness, it is easy to form a vignetting phenomenon, which requires attention during use.

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