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3 Cards in this Set
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- Back
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What are aspheric lenses? |
Lenses which employ a surface created by the revolution of a non-spherical curve which may be a conic section. |
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Why is the use of these surfaces beneficial? |
The conicoidal surface is astigmatic and can be used to neutralise aberrational astigmatism allowing thinner, flatter best form lenses to be produced. |
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Name 4 conic sections. |
1. Circle. 2. Ellipse. 3. Parabola. 4. Hyperbola. |
