A lens designed to minimize, even eliminate spherical abberation and other distortions in a lens.
Image From: Aspheric Lens
An aspherical lens is neither a sphere nor a cylinder, it is not uniformly thick either. Split along it's parallel axis, each side is not the same (hence aspherical).
Image From: Aspheric lens - Wikipedia, the free encyclopedia
An aspherical lens has 2 main uses. One, to bend light so that all incoming light across the entire surface area intersect at one spot (called the focus plane)
Image From: Aspheric Lens
The other use is to project light evenly across a single plane parallel to the lens.
Image From: Aspheric Lens
An aspherical lens is neither a sphere nor a cylinder, it is not uniformly thick either. Split along it's parallel axis, each side is not the same (hence aspherical).
Image From: Aspheric lens - Wikipedia, the free encyclopedia
An aspherical lens has 2 main uses. One, to bend light so that all incoming light across the entire surface area intersect at one spot (called the focus plane)
Image From: Aspheric Lens
The other use is to project light evenly across a single plane parallel to the lens.