Spectral multiplexing method for digital snapshot spectral imaging

• Published in: Applied optics. Optical technology and biomedical optics Vol. 48; no. 8; p. 1520
• Main Authors: Golub, Michael A, Nathan, Menachem, Averbuch, Amir, Lavi, Eitan, Zheludev, Valery A, Schclar, Alon
• Format: Journal Article
• Language: English
• Published: United States 10.03.2009
• ISSN: 2155-3165
• DOI: 10.1364/ao.48.001520

We propose a spectral imaging method for piecewise "macropixel" objects, which allows a regular digital camera to be converted into a digital snapshot spectral imager by equipping the camera with only a disperser and a demultiplexing algorithm. The method exploits a "multiplexed spectrum" intensity pattern, i.e., the superposition of spectra from adjacent different image points, formed on the image sensor of the digital camera. The spatial image resolution is restricted to a macropixel level in order to acquire both spectral and spatial data (i.e., an entire spectral cube) in a single snapshot. Results of laboratory experiments with a special macropixel object image, composed of small, spatially uniform squares, provide to our knowledge a first verification of the proposed spectral imaging method.