Apple patents periscope lens design with two prisms, LG and Corning working on liquid lenses 
According to a forecast by analyst Ming-Chi Kuo, Apple will not add a periscope lens to iPhones until 2023. But the company is definitely working on the matter and has at least two patents on periscopes.
One was dug up by Patently Apple earlier today and shows a periscope system with two prisms and a stack of lenses between the two. That stack will provide autofocus and may also be configured to do Optical Image Stabilization.
This is interesting because the typical periscopes we’ve seen in smartphones have only one lens and it is also used for OIS purposes, not the lenses that follow…
Tech News For Today 