2012-07-17

Specification of our achromatic lens as follow:
*Material:BK7,ZF2,ZF7(or according to your request)
*Dia.:3~200mm(+0/-0.05)
*Center thickness :1mm~20mm
tolerance:+/-0.1
*Surface quality: 60-40 Scrath/Dig
*Surface figure:0.5-0.2
*Centration < 3arc min
*Chamfer:0.1-0.25*45 degrees
*Design wavelength:486.1mm,587.6mm,656.3mm
(the parameter is dimension of normal lens,so specification will be changed according to different dimension and material)