BK7 ball lenses are great optical components for improving signal coupling between fibers, emitters, and detectors. They are used in endoscopy, bar code scanning, ball performs for aspheric lenses and sensor applications. Ball lenses are manufactured from a single substrate of glass and can focus or collimate light, depending upon the geometry of the input source.
There are 5 key parameters needed to understand and use ball lenses: 1), diameter of input source. 2), Diameter of ball lens. 3), Effective focal length of ball lens. 4), Back focal length of ball lens and index of refraction of ball lens. EFL is very simple to calculate since there are only two variable involved, diameter of ball lens and index of refraction.
Our Custom Made Capabilities:
| Diameter range | 1mm to 20mm |
| Tolerance | +/-0.002mm |
| Sphericity | +/-0.002mm |
| Surface quality | 40-20 or better |
| Material | N-BK7 or H-K9L |
Here are the lists of the ball lenses we have in stock,
|
Diameter |
3mm +/-0.002 |
|
Lens shape |
sphere |
|
Substrate |
N-BK7 |
|
Sphericity |
0.002mm |
|
Scratch and dig |
40-20 |
|
|
|
Diameter |
2mm +/-0.003 |
|
Lens shape |
sphere |
|
Substrate |
N-BK7 |
|
Sphericity |
0.003mm |
|
Scratch and dig |
40-20 |
|
Index of refraction |
1.51 |
|
Coating |
NO |
|
|
|
Diameter |
2.5mm +/-0.001 |
|
Lens shape |
sphere |
|
Substrate |
N-BK7 |
|
Sphericity |
0.001mm |
|
Surface quality |
40-20 |
|
Index of refraction |
1.51 |
|
Coating |
NO |
|
|
