Saturday, May 28, 2011

What is an aspheric lens?

The term "Aspherical lens" refers to a lens; the form of the usual, spherical curvature is different.

Such a design allows reducing a larger number of parameters, the aberrations of the conventional spherical lenses. The unpleasant effect of spherical aberration, a common focus error, can be fully corrected by such construction. Such lenses are used, among other things, for light integration with lights and projectors, as they allow a higher light output. There are also aspherical lenses: The characteristic shape allows for more far-sighted glasses significantly thinner and thus visually pleasing spectacles.

Equally, however, aspherical lenses are used in e-16005 aligncenter" title="SAMSUNG-GALAXY-S-4G" src="http://www.buy-smartphone.co.cc/wp-content/uploads/2011/03/samsung-galaxy-s4g-300x300.jpg" alt="Samsung Galaxy S 4G" />


camera lenses are used, especially at wide-angle models and lenses with high light intensity. If one would use a conventional spherical lens, the risk of aberrations would rise significantly: the camera would have to correct this in the next step in software, thus reducing the intake end always in one way or another way. Aspheric lenses reduce this camera side correction effort, while allowing a very compact, lightweight lens design.

The production of an aspheric lens made by complicated processes such as magnetorheological polishing, molding, grinding, or the so-called "Ion Beam Figuring (surface treatment by ion beam). Overall, the cost is significantly higher than for the spherical counterpart, so that the price of the corresponding devices differs significantly.

Title Post: What is an aspheric lens?
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Author: the Wicaksonos Family

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