Need Aspherical Lens Equation (+20d, 55mm)

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A user seeks an equation for a +20 diopter aspherical lens with a diameter of 55mm, noting a lack of background in physics or optics. The importance of the lens material's index of refraction is highlighted, as it affects the lens shape. A response suggests using Wikipedia as a resource, indicating it contains relevant information. The discussion emphasizes the need for specific material properties to derive the correct equation. Understanding these factors is crucial for accurate lens design.
Raza121
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Hello.
I am not related to physics or any optics related field.
I am in need of equation for +20d aspherical lens of diameter 55mm.
Can anybody help me?
 
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The shape is definitely going to depend on the index of refraction of the material it is made out of.
 
Raza121 said:
Hello.
I am not related to physics or any optics related field.
I am in need of equation for +20d aspherical lens of diameter 55mm.
Can anybody help me?
Welcome to the PF.

When I go a Google search on the title of your thread, the first non-advertisement link is this one for wikipedia. It looks to have what you need (as long as you know the index of refraction of your material, as already pointed out)... :smile:
 

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