Factory Supply Optical Convex Lens transparent Silicone Optical Aspherical Lens for Stage Light

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Small aspheric glass lenses can be made by molding, which allows cheap mass production. Due to their low cost and good performance, molded aspheres are commonly used in inexpensive consumer cameras, camera phones, and CD players.They are also commonly used for laser diode collimation, and for coupling light into and out of optical fibers.
Larger aspheres are made by grinding and polishing. Lenses produced by these techniques are used in telescopes, projection TVs, missile guidance systems, and scientific research instruments. They can be made by point-contact contouring to roughly the right form which is then polished to its final shape. In other designs, such as the Schmidt systems, the aspheric corrector plate can be made by using a vacuum to distort an optically parallel plate into a curve which is then polished "flat" on one side. Aspheric surfaces can also be made by polishing with a small tool with a compliant surface that conforms to the optic, although precise control of the surface form and quality is difficult, and the results may change as the tool wears.

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Spherical Vs Aspherical Lenses

Aspherical spectacle lenses use varying curves across their surface to reduce bulk and make them flatter in their profile. Spherical lenses use a singular curve in their profile, making them simpler but bulkier, especially in the center of the lens.

Aspheric Advantage

Perhaps the most powerful truism about asphericity is that vision through aspheric lenses is closer to natural vision. Aspheric design allows flatter base curves to be used without compromising optical performance. The basic difference between a spherical and an aspheric lens is that a spherical lens has one curvature and is shaped like a basketball. An aspheric lens curves gradually, like the football below. The aspheric lens reduces magnification to make the appearance more natural and the decreased center thickness uses less material, resulting in less weight.


Aspherical lens  (6)
Achromatic lenses  (8)

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