Chinese Optics Letters, Volume. 18, Issue 6, 060901(2020)

Use of focus stacking and SfM techniques in the process of registration of a small object hologram

Sławomir Paśko1, Marek Sutkowski2、*, and Ramunas Bakanas3
Author Affiliations
  • 1Institute of Micromechanics and Photonics, Warsaw University of Technology, 02-525 Warsaw, Poland
  • 2Institute of Microelectronics and Optoelectronics, Warsaw University of Technology, 00-665 Warsaw, Poland
  • 3Geola Digital uab., Vilnius 03227, Lietuva
  • show less
    Figures & Tables(8)
    (a) Scheme of the recording set-up. A series of images with limited DoF [examples in (b) and (c)] were used to create (d) a full DoF image with use of FS software. It was repeated for different perspectives (by x and y rotations).
    Sample final input image (with increased DoF) used for 3D data reconstruction by SfM.
    Virtual set-up for generation of multiple views preparation for digital holographic printer. The image is shown in the xz plane.
    Optical printer scheme for one color. Three identical schemes are coupled together for the three primary colors, or red–green–blue (RGB) laser beams are combined into one ‘white light’ beam and put through one apochromatic objective.
    Hogel formation for a single-parallax digital holographic print: 1, the SLM; 2, the principal focus (behind Hogel); 3, the FOV of individual SLM pixels from Hogel; 4, the Hogel recording position just downstream of the focus; RB, the reference beam.
    Final result of reconstruction of point clouds of the measured microscopic object—an insect.
    Sample views of printed single-parallax digital hologram made of cloud of points. Final dimensions are 360 mm×190 mm.
    Flowchart of activities. ImRec, registration of series of input images; FocStack, focus stacking process; SfM, shape reconstruction (75 min); ImGen, calculation needed by the Geola Digital Holoprinter (180 min); HolRec, printing of the final hologram.
    Tools

    Get Citation

    Copy Citation Text

    Sławomir Paśko, Marek Sutkowski, Ramunas Bakanas. Use of focus stacking and SfM techniques in the process of registration of a small object hologram[J]. Chinese Optics Letters, 2020, 18(6): 060901

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category: Holography

    Received: Nov. 28, 2019

    Accepted: Mar. 6, 2020

    Published Online: May. 9, 2020

    The Author Email: Marek Sutkowski (sut@imio.pw.edu.pl)

    DOI:10.3788/COL202018.060901

    Topics