3 1 ▁foot - lam bert ▁for ▁ 2 D ), ▁a ▁substantial ▁improvement ▁on ▁current ▁generation ▁ 3 D ▁systems ▁which ▁deliver ▁in ▁the ▁range ▁of ▁ 3 ▁to ▁ 4 ▁foot - lam bert ▁for ▁ 3 D . ▁The ▁result ▁is ▁improved ▁bright ness , ▁color ▁and ▁contrast ▁compared ▁to ▁traditional ▁x en on ▁project ors . ▁The ▁first ▁the aters ▁tempor arily ▁used ▁off - the - sh elf ▁dual ▁Christ ie ▁ 4 K ▁las er ▁project ors ▁until ▁the ▁Dol by ▁V ision - cap able ▁ones ▁were ▁sh ipped ▁out ▁in ▁spring ▁ 2 0 1 5 . ▁ ▁Dol by ▁ 3 D ▁uses ▁spectrum ▁separation , ▁where ▁the ▁two ▁project ors ▁function ▁in ▁stack ed ▁operation ▁with ▁each ▁project or ▁em itting ▁a ▁slightly ▁different ▁w avel ength ▁of ▁red , ▁green , ▁and ▁blue ▁primary . ▁There ▁is ▁no ▁polar ization ▁present ▁on ▁the ▁project or , ▁and ▁the ▁ 3 D ▁spect acles ▁have ▁not ch ▁filters ▁that ▁block ▁the ▁prim aries ▁used ▁by ▁the ▁project or ▁project ing ▁the ▁image ▁intended ▁for ▁the ▁other ▁eye . ▁ ▁Dol by ▁V ision ▁is ▁able ▁to ▁display ▁the ▁following ▁combinations ▁of ▁resolution ▁and ▁frame ▁rate : ▁▁ 2 K ▁– ▁ 2 D ▁at ▁ 1 2 0   f ps , ▁ 6 0   f ps , ▁ 4 8   f ps ▁and ▁ 2 4   f ps ▁▁ 2 K ▁– ▁ 3 D ▁at ▁ 1 2