Aspherical optics

Parabolic mirrors have an exact focus and form sharp images. Specialy configured aspherical lenses perform in a similar way.

The zoom lens has one aspherical surface. A thin resin layer is shaped with a metal mold. (Thin layers are less affected by changes in temperature than resin lenses. The one aspherical surface maintains image quality with fewer lens components.

Note: camera lenses are made with many thin spherical components because the image quality is greatly improved over the image produced by one thick lens.

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