▁optical ▁imag ing ▁of ▁mole cular ▁gat ings ) ▁– ▁the ▁world ' s ▁first ▁concept ▁of ▁h olog raph y ▁and ▁the ▁second ▁of ▁the ▁achiev ements ▁cher ished ▁the ▁most ▁by ▁himself . ▁This ▁th esis ▁refers ▁to ▁Wolf ke ' s ▁stay ▁in ▁Kar ls ru he ▁in ▁ 1 9 1 2 , ▁where ▁he ▁was ▁an ▁assistant ▁to ▁Professor ▁Otto ▁Le h mann ▁– ▁a ▁phys ic ist ▁known ▁as ▁the ▁father ▁of ▁Li qu id ▁cry st als . ▁In ▁his ▁labor atory ▁Wolf ke ▁noticed ▁that ▁it ▁was ▁possible ▁to ▁first ▁record ▁the ▁image ▁on ▁a ▁phot ographic ▁plate ▁by ▁ill umin ating ▁the ▁X - ray ▁cry stal ▁and ▁then ▁read ▁it ▁with ▁the ▁use ▁of ▁additional ▁optical ▁unit ▁and ▁visible ▁light . ▁Dennis ▁G abor , ▁during ▁his ▁Nobel ▁lecture ▁said : ▁“ I ▁did ▁not ▁know ▁at ▁that ▁time , ▁and ▁neither ▁did ▁B rag g , ▁that ▁Mie cz ys ław ▁Wolf ke ▁had ▁proposed ▁this ▁method ▁in ▁ 1 9 2 0 , ▁but ▁without ▁real izing ▁it ▁experiment ally ”. ▁ ▁In ▁ 1 9 2 2 , ▁after ▁returning ▁to ▁Poland , ▁Mie cz ys ław ▁Wolf ke ▁took ▁up ▁the ▁problem ▁of ▁low ▁temper atures . ▁In ▁ 1 9 2 4 ▁Jó zef ▁W ier usz - K ow al ski ▁– ▁phys ic ist , ▁professor ▁at ▁the ▁Wars aw ▁University ▁of ▁Technology ▁and ▁from ▁ 1 9 2 1 ▁– ▁Polish ▁amb assador ▁in ▁the