Committed to the Future, Fulfilling the Promise of Excellence

Double Concave Lenses

Lens Specifications

Material BK7、B270、Quartz, Borosilicate glass, Optical glass, Customer-designated materials
Diameter 2mm~1000mm 
Radius specified by customer
Chamfer specified by customer
Coating specified by customer
  Low grade General grade High grade
Diameter tolerance +/-0.2 0 0
Surface quality 120-80 60-40、80-50 10-5、20-10、40-20
Parallelism 3’ 1’ 10’’
Surface accuracy 1/2λ 1/10λ
Radius tolerance(ΔR) R/300 R/500 R/1000
Central Thickness(Tc) +/-0.1 +/-0.05mm +/-0.01
Edge Thickness(Te) +/-0.1 +/-0.05mm +/-0.01
Clear Aperture 0.85 0.9 1
Centration 5’ 3’ 30’’