A focusing lens is a focal lens that focuses light beams and can produce high energy density. Their uses are different due to their different materials and shapes. The main materials are fused silica, Zinc sulfide, Zinc selenide, Calcium fluoride and other materials. Their uses are different due to different shape characteristics. Today, let's take a brief look at different focusing lenses and their working principles?
The optical fiber focusing mirror, whose base material is fused silica, is coated with Anti-reflective coating on both sides. The focusing mirror focuses the beam to produce a focus of high energy density for processing the working materials, and is widely used in laser fields such as laser cutting, laser welding, laser cladding, and laser quenching.
Spherical focusing mirror is used for the focusing mirror in the fiber laser optical system. The base material is fused quartz, and both sides are coated with Anti-reflective coating. In order to reduce spherical aberration as much as possible, it is usually better to use a two-piece combined spherical lens.
Aspherical focusing mirror is used for the focusing mirror in the fiber laser optical system. The base material is fused quartz material, and Anti-reflective coating is coated on both sides. Based on the aspheric application, spherical aberration will not be introduced in the transmission wavefront and the extreme diffraction performance can be achieved. Single piece aspheric lens can completely replace the traditional multi piece spherical combination lens.
The plano convex focusing mirror is used in CO lasers and laser optical systems. As its name implies, it is a plane and a convex focusing mirror on the other side. The base material is laser grade CVD Zinc selenide material, with Anti-reflective coating coated on both sides. From substrate to processing and coating, we strictly control the quality of lenses to ensure that we provide customers with the highest quality lenses. In order to achieve the most satisfactory focusing performance, the convex surface of the planoconvex focusing mirror should face the vertical incident beam and the plane should face the workpiece. These lenses are widely used in all fields of production or use of industrial and medical laser systems. They are also used in laser cutting, laser welding, laser cladding, laser quenching, etc.
The crescent focusing mirror is a concave convex focusing mirror, the base material is laser grade CVD Zinc selenide material, and Anti-reflective coating is coated on both sides. The crescent focusing mirror can effectively reduce spherical aberration and generate smaller light spots than the flat convex focusing mirror. The convex surface of the crescent focusing mirror should face the perpendicular incident beam, and the concave surface should face the workpiece. These lenses are widely applicable to all customers who produce or use industrial and medical laser systems.
Cylindrical lenses are circular or rectangular lenses with a cylindrical surface. Unlike spherical lenses, they focus the light beam into a focal line rather than a focal point. The two sides of the lens are coated with Anti-reflective coating. In some spectral bands, multi-layer coating can also be used to increase its transmission performance. The cylindrical lens can be made of Zinc selenide, germanium, silicon and other infrared materials as the base material. Its application fields include laser scanning systems, laser diode systems, spectrophotometers, projectors and optical data storage systems.
Parabolic focusing mirror is used in the laser system as a reflective focusing mirror. Its base material is usually oxygen free copper, which is usually used in high-power laser systems due to its high thermal conductivity.