Optical ball lens and half ball lens: Why use a ball lens and a half ball lens?
Ball lens is great optical components for improving signal coupling between fibers, emitters, and detectors. They are also used in endoscopy, bar code scanning, ball pre-forms 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.
Half ball lense is also common and can be interchanged with full ball lenses if the physical constraints of an application require a more compact design.