new grating item

Holographic gratings:Specifications:Ruled area: 70% Ruled gratings:Specifications:Ruled area: 70%Concave gratings:Specifications:Ruled area: 70%

cemented optical lens

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~20mmtolerance:+/-0.1*Surface qualit ...