Qu'est-ce qu'une lentille asphérique?
Une lentille asphérique est une lentille dont les profils de surface ne sont pas des portions de sphère ou de cylindre. En photographie, un ensemble lentille qui comprend un élément asphérique est souvent appelé lentille asphérique.
The asphere’s more complex surface profile can reduce or eliminate spherical aberration and also reduce other optical aberrations such as astigmatism, compared to a simple lens. A single aspheric lens can often replace a much more complex multi-lens system. The resulting device is smaller and lighter, and sometimes cheaper than the multi-lens design.Aspheric elements are used in the design of multi-element wide-angle and fast normal lenses to reduce aberrations.
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