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is circular shape the only shape that can converge light?


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Posted

We know that convex lens converge light at a point,  
Is there any other shapes that could also converge light?

What if a convex len has only one side circular while the other end is flattened, when the incident light enters the circular side, what will be the transmitted light?

Posted

A flat lens will bend light, if the index of refraction varies with position. GRadient INdex, or GRIN lenses

 

  On 2/23/2023 at 11:56 AM, Genady said:

No. See Fresnel lens.

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That still relies on curved surfaces

  On 2/23/2023 at 8:35 AM, kenny1999 said:

What if a convex len has only one side circular while the other end is flattened, when the incident light enters the circular side, what will be the transmitted light?

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These are called plano-convex (as opposed to bi-convex, curved on both sides) and are quite common.

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