The role of aspherical lens technology in millions of HD

Because the use of a piece of aspherical lens can replace a group of spherical lenses, so that the optical structure of the camera lens is relatively simplified, so that it is easy to obtain a larger optical aperture in the optical path and mechanical structure. Moreover, the aspherical lens enables the light of the edge portion and the light of the central portion to be focused on the same plane through the lens, so that the entire surface of the lens can be clearly and effectively used, so that the entire lens can be properly focused, and the effective communication is relatively effective. Optical caliber becomes larger. For example, the LMVZ38A-IR (1/3"f/3~8mmF/1.0) series lens produced by KOWA Co., Ltd. The reason why the lens reaches F/1.0 is the use of aspherical lenses.

The important feature of aspherical lenses is that they can improve the refractive index of light on the edge of the lens and make the imaging of the lens edge better. The spherical lenses, especially the high-magnification spherical lenses, are more prone to spherical aberration and image distortion, especially the barrel distortion caused by the refraction of the light at the edge of the spherical lens. When the aspheric lens is used in a high-magnification zoom lens, due to the aspheric lens The edge incident light is corrected in the opposite direction of the spherical lens distortion, thereby effectively eliminating the barrel distortion.