US 11,698,550 B2
Composite lens system with changeable focal length
Andrew Acreman, Oxford (GB); Nathan James Smith, Oxford (GB); and David James Montgomery, Bampton (GB)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Filed by SHARP KABUSHIKI KAISHA, Sakai (JP)
Filed on May 25, 2021, as Appl. No. 17/329,774.
Prior Publication US 2022/0382100 A1, Dec. 1, 2022
Int. Cl. G02F 1/1335 (2006.01); G02F 1/13363 (2006.01)
CPC G02F 1/133526 (2013.01) [G02F 1/133541 (2021.01); G02F 1/133638 (2021.01)] 22 Claims
OG exemplary drawing
 
1. A composite lens system comprising: one or more first optical elements configured to provide a first focal length selected from a first continuous range of focal lengths; and one or more second optical elements configured to provide a discrete focal length selected from a plurality of discrete focal lengths, wherein the one or more first optical elements and the one or more second optical elements are configured in series such that the composite lens system provides an output focal length based on a combination of the selected first focal length and the selected discrete focal length, and the plurality of discrete focal lengths are evenly spaced apart.