title: Phase shifting technique for extended inline holographic microscopy with a pinhole array.
abstract: Digital inline holographic microscopy using a pinhole for sample illumination allows lensless imaging. To overcome restrictions of the sample size and density in the setup additional reference waves are generated by extending the single pinhole to a regular 2D pinhole array illumination. A technique is presented that uses phase shifting between the pinhole waves. Multiple foci with stable phase differences and a phase error (rms) of 0.027 rad generate pinhole waves which illuminate an undiluted, dense blood smear sample. Amplitude and phase images of the blood sample were successfully reconstructed.
authors.affiliation: Institute of Photonic Technology, Albert-Einstein-Str 9, 07747 Jena, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Graulig
authors.forename: Mario
authors.initials: M
authors.lastname: Kanka
authors.forename: Rainer
authors.initials: R
authors.lastname: Riesenberg
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D006696:Holography / Q000295:instrumentation*; D007089:Image Enhancement / Q000295:instrumentation*; D007909:Lenses; D008029:Lighting / Q000295:instrumentation*; D008858:Microscopy, Phase-Contrast / Q000295:instrumentation*; D009862:Online Systems