The based function of the lenses is that when parallel beams are converged or lights from point sources are converted to parallel beams,.The lenses are polished carefully .We can supply these lens that uncoated and coated with broadband multilayer AR coatings for visible . The focal length of a single lens is designed at the wavelength 546.1nm.We can supply the lens which diameter from3mmto500mm.Other sizes and coatings are available upon request.
Item
Specifications
Material
Fused Silica; N-BK7（H-K9L) or others
Diameter tolerance
+0.0/-0.2mm
Thickness tolerance
±0.2mm
Centration
<3min
Focus length tolerance
±2%
Surface quality
60/40
Clear aperture
85%
Bevel(face width×45°)
0.2~0.4mmor specified by
customer
Coating
Specified by customer