With the continuous development of technology, optical lenses are constantly growing in various industries and their applications are also very extensive. There are two types of optical lenses: spherical lenses and aspherical lenses. Today, let's take a look at the specific knowledge points of aspherical lenses.
Optical aspherical lenses have significant applications in industries, national defense, and commerce. When designing optical systems with aspheric surfaces, the selection of aspheric equations is crucial as it determines the optimal optimization results of the system. So we share with you the basic knowledge of optical aspheric lenses.
The definition of optical aspherical lenses is broadly defined as other surfaces that do not include spherical or planar lenses. From an application perspective, aspherical lenses can be divided into axisymmetric aspherical lenses, aspherical lenses with two symmetrical surfaces, and free form surface lenses without symmetry.
Classification of optical aspheric lenses
Usually, aspheric lenses are divided into quadratic aspheric lenses and higher-order aspheric lenses. Secondary aspherical lenses are the most widely used in optical systems and have a unique position compared to other types of aspherical lenses. Secondary aspherical lenses can be further divided into: aspherical lenses with a pair of apertures and aspherical lenses without apertures. There is a pair of imageless nearly aspheric lenses widely used in various Optical instrument, which are the most common aspheric lenses. Non imageless aspherical lenses are widely used in optical systems that form distorted images. High order aspheric lenses can be divided into surfaces with monotonic meridional curves and non monotonic surfaces.