Hello, I am trying to find the formula to determine what tools to use for plus lens depending on the index of refraction. I know the thin lens formula but I do not know how to compensate for thickness.
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Tool Curve Formula for thick lenses
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Thank You
I used the following formula to determine D1 used in your formula.
Basecurve marked on box = 4.51 poly
.586/.530 X 4.51 = 4.98(I then used this number for D1 stated in your forumula along with the other parameters needed). My guess is that the values marked on the box is not the real front curve am I correct?
Thanks for your help
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Originally posted by LarryLane View PostI used the following formula to determine D1 used in your formula.
Basecurve marked on box = 4.51 poly
.586/.530 X 4.51 = 4.98(I then used this number for D1 stated in your forumula along with the other parameters needed). My guess is that the values marked on the box is not the real front curve am I correct?
Thanks for your help
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