title: Image-based registration for synthetic aperture holography.
abstract: High pixel count apertures for digital holography may be synthesized by scanning smaller aperture detector arrays. Characterization and compensation for registration errors in the detector array position and pitch and for phase instability between the reference and object field is a major challenge in scanned systems. We use a secondary sensor to monitor phase and image-based registration parameter estimators to demonstrate near diffraction-limited resolution from a 63.4 mm aperture synthesized by scanning a 5.28 mm subaperture over 144 transverse positions. We demonstrate 60 μm resolution at 2 m range.
authors.affiliation: Duke University Fitzpatrick Center for Photonics and Communications Systems, Durham, North Carolina 27708, USA.
authors.forename: Sehoon
authors.initials: S
authors.lastname: Lim
authors.forename: Kerkil
authors.initials: K
authors.lastname: Choi
authors.forename: Joonku
authors.initials: J
authors.lastname: Hahn
authors.forename: Daniel L
authors.initials: DL
authors.lastname: Marks
authors.forename: David J
authors.initials: DJ
authors.lastname: Brady