Non spherical lens focusing mirror
Spherical lenses have a constant curvature from the center to the edge of the lens, while the curvature of non spherical lenses constantly changes from the center to the edge. The curvature of a spherical lens is constant, meaning that the front and rear surfaces of the lens are part of the sphere. Each surface can be convex, concave, or flat. In order to ensure optical performance in photographic lenses, it is necessary to consider many factors; Aberration” Perform calibration. If only spherical lenses are used for correction, there will need to be many lens combinations that meet the technical requirements of the lenses. For special high-order lenses, only spherical lenses can achieve satisfactory aberration correction for users.
In almost all cases, the optical axis of the lens passes through the physical center of the lens. The curvature radius of a non spherical lens varies with the central axis, and a good curvature radius can maintain good aberration correction. The most obvious advantage of using non spherical lenses instead of spherical lenses is that it can correct the spherical errors caused by the placement of spherical lenses in collimation and focusing systems. Non spherical lenses can eliminate spherical aberration to the greatest extent possible.
In practical applications, compared to the case of spherical lenses, only one non spherical lens can achieve or exceed the effect of several spherical lens combinations, thereby meeting technical requirements that cannot be met by only spherical lenses, and greatly reducing the number of lenses.
The main processes for non spherical lenses include precision glass forming, precision polishing, mixing, and injection molding.
At present, molding is one of the common methods in the process of forming non spherical lenses. Molding is the process of heating glass material to high temperatures, turning it into plastic, forming it from an aspherical mold, and gradually cooling it to room temperature. Heating glass and molding it through an aspherical mold can result in the following issues:
1. When glass is heated, the heating is uneven, and the plasticity of the heated glass is uneven. The formed non spherical lens will undergo certain deformation;
2. When molding glass materials, due to the uneven filling of glass materials in the mold, the thickness distribution of non spherical lenses is uneven.
The above issues will lead to a decrease in the performance and quality of the formed non spherical lens.
Ruicheng Optoelectronics has a complete optical cold processing production line, which can produce customized optical prisms and lenses of various conventional and unconventional sizes. We can meet various high-precision production requirements of customers and provide a complete optical vacuum coating process, realizing integrated production customization services for optical glass. We also offer filter products in other categories and specifications.
In almost all cases, the optical axis of the lens passes through the physical center of the lens. The curvature radius of a non spherical lens varies with the central axis, and a good curvature radius can maintain good aberration correction. The most obvious advantage of using non spherical lenses instead of spherical lenses is that it can correct the spherical errors caused by the placement of spherical lenses in collimation and focusing systems. Non spherical lenses can eliminate spherical aberration to the greatest extent possible.
In practical applications, compared to the case of spherical lenses, only one non spherical lens can achieve or exceed the effect of several spherical lens combinations, thereby meeting technical requirements that cannot be met by only spherical lenses, and greatly reducing the number of lenses.
The main processes for non spherical lenses include precision glass forming, precision polishing, mixing, and injection molding.
At present, molding is one of the common methods in the process of forming non spherical lenses. Molding is the process of heating glass material to high temperatures, turning it into plastic, forming it from an aspherical mold, and gradually cooling it to room temperature. Heating glass and molding it through an aspherical mold can result in the following issues:
1. When glass is heated, the heating is uneven, and the plasticity of the heated glass is uneven. The formed non spherical lens will undergo certain deformation;
2. When molding glass materials, due to the uneven filling of glass materials in the mold, the thickness distribution of non spherical lenses is uneven.
The above issues will lead to a decrease in the performance and quality of the formed non spherical lens.
Ruicheng Optoelectronics has a complete optical cold processing production line, which can produce customized optical prisms and lenses of various conventional and unconventional sizes. We can meet various high-precision production requirements of customers and provide a complete optical vacuum coating process, realizing integrated production customization services for optical glass. We also offer filter products in other categories and specifications.