Half ball lens spec

Half ball Lens

 Half-ball lenses are hemispheres.Half-ball lens have uniform light dispersion and are commonly used in high power LED and UV LED, focusing and coupling light. It has many advantages over silicon lens and plastic lens.

Nova supply half-ball lenses are made from N-BK7, H-K9L, Fused Silica, Sapphire, and more. We can also deliver custom Half-Ball lenses and alternative materials in a range of diameters.

 

Technical parameters of half ball lens

Material

H-K9L/N-BK7,JGS1/UVFS   ,Sapphire

Diameter range

1mm-25mm

Diameter tolerance

+/-0.1mm 

Thickness tolerance

±0.1mm

Focal   length tolerance

±1

Surface   accuracy

λ/10~λ/2@632.8 nm 

Surface quality

5/1020/1040/2060/40

Clear aperture

>90%

Coating

AR   or customized