|
|
Specifications
|
|
Diameter
|
φ25.4－φ254mm
|
|
E.F.L.
|
At the request of customers
|
|
Wavelength(λ)
|
At the request of customers
|
|
Material
|
BK7 (K9) or as requested
|
|
Clear Aperture
|
>90%
|
|
Bevel
|
(0.25-1.0)mm× 45°(depends on the diameter)
|
|
Diameter Tolerance
|
+0.0/-0.15mm or as requested
|
|
Focal Length Tolerance
|
±2%
|
|
Centering Tolerance
|
3’ or as requested
|
|
Surface Figure
|
λ/4 or as requested
|
|
|
|
|
C.T. Tolerance
|
±0.15mm or as requested
|
|
E.T. Tolerance
|
Reference
|
|
Coating
|
At the request of customers
|
We specialize in production of medium to large-size series of custom lenses with exacting tolerances, high grade surface finish and difficult coatings. Please send us your specification or drawing and we will be happy to return a quotation ASAP. Our average response time is within 24 hours.
|
