LENS DESIGN

SECONDARY CURVE WIDTH DETERMINATION


In the case of a bicurve lens, the SCW is 
equal to the overall lens diameter (OAD) 
minus the optical zone diameter (OZD) 
divided by 2.

            OAD-OZD
SCW=  ------------
                  2

Therefore, if the OAD and OZD are given 
for a bicurve lens the SCW can be 
calculated.