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  Thick Lens Equation Rev 2.0      
 
Determine the focal length of a thick lens  
Material index  
Radius 1 mm (positive is convex on R1)  
Radius 2 mm (negative is convex on R2)  
Center thickness mm  
Focal Length mm 1/f = (n-1)*(1/R1-1/R2+(n-1)*CT/(n*R1R2)) in air  
 
    Handy optics calculations  
    from LightMachinery Inc.