Single-Shot Three-Wavelength Digital Holography Using Spatial Frequency-Division Multiplexing and Spatial Bandwidth Enhancement

Abstract

We present single-shot three-wavelength digital holography using spatial frequency-division multiplexing, spatial bandwidth enhancement, and three reference arms to generate spatial carrier frequencies. Recordable spatial frequency bandwidth is extended by utilizing signal theory. Intentional aliasing makes use of the recordable space-bandwidth product of a monochromatic image sensor. Three reference arms generates different spatial carrier frequencies for respective wavelengths. We demonstrate its feasibility by three-wavelength and lens-less recording of a metallic object with a single-shot exposure.