Home / Custom / Optical Components / Optical Spherical Lens / Ball Lens 
Ball lens is the simplest type of optical lens. The basic principle of ball lens imaging is refraction. When light travels from one medium (such as air) into another medium of different density (such as glass), its direction of propagation changes. The focal length (f) of a ball lens depends on its diameter (D) and the refractive index (n) of the material it is made of. Its approximate formula is: f ≈ D / (4(n-1))
Their optical characteristics are the same from any direction, with no directionality, making installation convenient.
They can achieve a high numerical aperture (NA) at a very short working distance, thus converging a large amount of light.
Compared to complex lens groups, a solid sphere is less prone to misalignment or damage due to mechanical stress.
| Substrate Material | H-K9L(CDGM), Sapphire, Ruby, JGS1, JGS2, Silicon, High Borosilicate etc. |
|---|---|
| Dimension | 0.5mm~80mm |
| Diamerter Tolerance | In general ±0.1mm, Best ±0.005mm |
| Sphericty | 0.01 mm (10 µm), 0.005mm (5 µm), 0.001mm (1 µm) |
| Center Tolerance | ±0.03mm~0.05mm |
| Surface Quality | 60/40, 40/20, 20/10, 10/5 |
en
English
繁体中文
Japanese
Korean
Russian
German
