Spherical lens and cylindrical lens

Here is a brief explanation of the difference between spherical lens and cylindrical lens ：

Spherical lens

For example, a convex spherical lens usually converges a parallel incident beam to a point .

Cylindrical lens

For example, a convex cylindrical lens usually converges parallel beams onto a line , in other words , Compared with spherical lens , If the section of cylindrical lens is XOY Face to face talk , Usually it only happens in X perhaps Y One of the directions converges the beam .

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