VARIABLE ZOOM

Brand Owner Address Description
VARIOZOOM Phonak Holding AG Laubisrütistrasse 28 CH-8712 Stäfa Switzerland VARIABLE ZOOM;hearing aids and appartus for the deaf, including parts thereof;
 

Where the owner name is not linked, that owner no longer owns the brand

    
Technical Examples
  1. A zoom lens is disclosed having a zoom ratio larger than four with a field of view at the short focal length position larger than 85 degrees and with a minimal number of moving groups. The zoom lens utilizes a compound zoom structure comprising an NP or NPP zoom kernel followed by a P or PP zoom relay, with only two or three moving groups that can be used for both zooming, focusing and athermalization. An overall compact package size is achieved by the use of prisms to fold the optical path in strategic locations. An optional variable power liquid cell can provide close focusing with little or no focus breathing.