Extended depth of field for single biomolecule optical imaging-force spectroscopy Chang, Minhyeok ; Oh, Jungsic ; Kim, Yeonghoon ; Hohng, Sungchul ; Lee, Jong-Bong Abstract Publication: Optics Express Pub Date: December 2017 DOI: 10.1364/OE.25.032189 Bibcode: 2017OExpr..2532189C