Optical protective film is a film with optical properties, its main role is to protect the surface of the optical device from pollution, scratches and corrosion and other adverse effects. In today's field of scientific and technological development, optical protective film is widely used in various fields, the following are some main application areas:

1. Optical lens Optical protective film can be applied to a variety of optical lenses, including camera lenses, eyeglass lenses, etc. By covering the surface of the lens with a protective film, it can effectively protect the lens from scratches, dirt and other substances, and extend the service life of the optical device. 2. Optical filter Optical protective film can also be applied to optical filters to adjust the transmission, reflection and absorption performance of optical devices. By coating different protective films on the surface of the filter, the specific wavelength of light can be filtered and divided to meet different optical needs. 3. Optical mirror In lasers, optical instruments and other optical mirrors, usually need to apply optical protective film to enhance its durability and stability. These protective films can effectively reduce reflection loss and scattering, and improve the transmission efficiency and performance of optical devices. 4. Display In a variety of liquid crystal display, LED display, OLED display and other optical display devices, optical protective film also plays an important role. It can protect the surface of the display from dirt, scratches and fingerprints, while improving the display and the feel of the experience. 5. Laser devices In laser devices, the application of optical protective film can protect the surface of the device, and can also adjust and control the laser beam. By covering a protective film at an appropriate position, the loss of the laser device can be effectively reduced and the quality of the beam can be improved. To sum up, optical protective film has a wide range of application prospects in the field of optical devices, with the continuous development and progress of science and technology, I believe that its application in the future will continue to expand and deepen, providing more possibilities and opportunities for the development and progress of optical technology.