kenny1999 Posted February 23, 2023 Share Posted February 23, 2023 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? Link to comment Share on other sites More sharing options...
StringJunky Posted February 23, 2023 Share Posted February 23, 2023 Same as glasses for long-sight. They are called plano-convex lenses: https://www.firebirdoptics.com/blog/intro-to-the-plano-convex-lens#:~:text=A plano-convex lens is,the lens being bowed outward. 1 Link to comment Share on other sites More sharing options...
John Cuthber Posted February 23, 2023 Share Posted February 23, 2023 A circle (or sphere) is not, in general, the right shape to focus parallel light to a point. https://en.wikipedia.org/wiki/Spherical_aberration Link to comment Share on other sites More sharing options...
Genady Posted February 23, 2023 Share Posted February 23, 2023 No. See Fresnel lens. Link to comment Share on other sites More sharing options...
swansont Posted February 23, 2023 Share Posted February 23, 2023 A flat lens will bend light, if the index of refraction varies with position. GRadient INdex, or GRIN lenses 3 hours ago, Genady said: No. See Fresnel lens. That still relies on curved surfaces 6 hours ago, 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? These are called plano-convex (as opposed to bi-convex, curved on both sides) and are quite common. Link to comment Share on other sites More sharing options...
Genady Posted February 23, 2023 Share Posted February 23, 2023 27 minutes ago, swansont said: That still relies on curved surfaces I know. Link to comment Share on other sites More sharing options...
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