Fig. 11From: Multifocal displays: review and prospectMultifocal displays structures enabled by switchable lenses. Multifocal displays can be enabled by switchable lenses that have discrete focal lengths, including (a) addressable PBLs made of LCs and (b) multifocal freeform lenses with a patterned shutter. It is doable to cascade multiple switchable lenses to achieve a dense focal stackBack to article page