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. Author manuscript; available in PMC: 2015 Nov 2.
Published in final edited form as: Nat Commun. 2014 Nov 20;5:5581. doi: 10.1038/ncomms6581

Figure 1.

Figure 1

Schematic of method: A self-luminous object with an extended spatial distribution produces light with a broad spectrum. Different spatial portions (pixels) of this object are incident on the entrance of an optical fiber from different directions. A spread-spectrum encoder (SSE) imparts a unique spectral code to each light direction in a power efficient manner. The resulting total spectrum at the output of the fiber is detected by a spectrograph, and image reconstruction is performed by numerical decoding. An example of a SSE is shown in the inset, consisting of two low finesse Fabry-Perot etalons of different free-spectral ranges, tilted perpendicular to each other to encode light directions in 2D.