AnsweredAssumed Answered

Aspheric lens - using formula in surface

Question asked by Carter West on Jun 17, 2013
Latest reply on Jun 19, 2013 by Carter West

Hi all,

 

I need to make two models of reading glass lens.  One is 1.75 diopter the other 2.5.  Client wants to use aspherical lens surface curvature due to limitataions of thickness.

 

-help-

 

He has provided the formula but I can't seem to get it to work.  I don't work often enough in the surface world and I know this is a factor in not seeing my errors.

 

=R-(R^2-r^2)^0.5+Br^4

 

Even if you can help without the formula and create 1.75 ashperical, then that would be great and using that example I can do the rest of the work.

 

Many thanks in adance

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