zemax設(shè)計(jì)菲涅耳透鏡時(shí)，  fresnel1參數(shù)中+Depth/-Freq、Radius、conic分別指什么？

Allow me to repost  here for depth/frequency setting [_kis  
The main fresnel lens types are: (%p@G5GU  
O^/z7,  
    * Constant groove depth. C8dC_9  
    * Contant groove pitch types. ;W"=s79  
>#pZ`oPEAv  
So if your depth is fixed you will define +ve value in the cell and to specify the "height" or "depth" of each groove feature. If the frequency of the groove is fixed then you use -ve value. Say putting down - 5 this implies that there are 5 grooves with a unit length. j_]#Ew\q  
\PU7,*2  
For radius, this is the curvature of the base surface. If you define one such lens and chaneg the radius and you shall see what it means. A graphic tells lounder than words. E}-Y!,v^  
D1G9^7:^E  
For conic: check conic section using Wikipedia and you should see what conic constant means. 'P'f`;'_DC  
s}w?Dvo