Spherical lens manufacturers analyze the difference between spherical and aspherical surfaces?
The main difference between a spherical mirror and an aspherical surface is this radian problem. The radian of the spherical mirror produced by the spherical lens manufacturer will be larger than that of the aspherical mirror, and the spherical mirror will be bent to the naked eye.
The so-called spherical and aspherical surfaces are mainly for lenses (all kinds of lenses, microscopes, etc.) and lenses of glasses (including contact lenses). For the geometric shape of spherical lens manufacturers, they are spherical lenses and aspherical lenses. The difference in geometric shape between the two determines that they are different in the refraction direction of parallel incident light, which affects the imaging effect.
The manufacturer of spherical lens presents the lens as a spherical arc, and its cross section is also arc-shaped. When light of different wavelengths is incident at different positions on the lens with parallel optical axis, it cannot be focused into a single point on the film plane (the plane perpendicular to the center of the lens and the lens focal line, and passing through the focal point), resulting in aberration, which affects the quality of the image, such as clarity degradation and deformation. Generally, ordinary lenses are composed of spherical lenses. To solve this imaging problem, spherical lens manufacturers will add lenses in the mirror body as aberration correction, but this may cause adverse effects As a result, the image quality will be further weakened, because the additional lenses will increase the chance of light reflection in the mirror body, causing glare.
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