Digital Incoherent Compressive Holography Using a Geometric Phase Metalens

Abstract

We propose a compressive self-interference incoherent digital holography (SIDH) with a geometric phase metalens for section-wise holographic object reconstruction. We specify the details of the SIDH with a geometric phase metalens design that covers the visible wavelength band, analyze a spatial distortion problem in the SIDH and address a process of a compressive holographic section-wise reconstruction with analytic spatial calibration. The metalens allows us to realize a compressive SIDH system in the visible wavelength band using an image sensor with relatively low bandwidth. The operation of the proposed compressive SIDH is verified through numerical simulations.

Technology Selection for Inline Topography Measurement with Rover-Borne Laser Spectrometers

“…Self-interference of the object field duplicates achieves this, akin to shearing interferometry. Spatial light modulators may apply phase-shifted field-curvature differences between the object field copies before detection [88]. Such common-path self-referencing interferometers are robust and even implementable with passive optics arranged as an axial-shearing interferometer [89,90], geometric phase optics [88] or, under the name "conoscopy", with birefringent crystals [89].…”