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What do you mean by Spherical aberration in lenses?

by aman in Science at 2017-04-17 16:00:07 got 1 Comments 21 Views
How it can be minimised?

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aman comment on "What do you mean by Spherical aberration in lenses?"

The inability of a lens of large aperture to bring all the rays in a white beam to focus at a single point is called a Spherical aberration.
spherical aberration can be minimised by the following methods-
1. by using the stops.
2. by placing the lens so that the total deviation is shared equally by the two surfaces of the lens.
3. by using two Plano convex lenses.