Accurately calculate the edge thickness of a thin -20.00D lens made with a plano front surface and a t= 1.0mm, n= 1.74 the lens is edged 42mm round,if the edge thickness is reduced by 50% using a plano tool find the diameter of the lens aperture produced?
Am i right in saying you use sags to calculate the edge thickness, I just dont have anything to calc final aperture size?
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