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A Three-channel miniaturized optical system for multi-resolution imaging

Publication date 2013
B-Phot Authors Heidi Ottevaere
DOI 10.1117/12.2023112
G. Belay, H. Ottevaere, Y. Meuret, and H. Thienpont, “A Three-channel miniaturized optical system for multi-resolution imaging,” in Proc. SPIE, Conference on current developments in lens design and optical engineering XIV, 2013, vol. 8841, p. 88410N.
Abstract Inspired by the natural compound eyes of insects, multichannel imaging systems embrace many channels that scramble their entire Field-Of-View (FOV). Our aim in this work was to attain multi-resolution capability into a multi-channel imaging system by manipulating the available channels to possess different imaging properties (focal length, angular resolution). We have designed a three-channel imaging system where the first and third channels have highest and lowest angular resolution of 0.0096 degrees and 0.078 degrees and narrowest and widest FOVs of 7 degrees and 80 degrees, respectively. The design of the channels has been done for a single wavelength of 587.6 nm using CODE V. The three channels each consist of 4 aspherical lens surfaces and an absorbing baffle that avoids crosstalk among the neighbouring channels. The aspherical lens surfaces have been fabricated in PMMA by ultra-precision diamond tooling and the baffles by metal additive manufacturing. The profiles of the fabricated lens surfaces have been measured with an accurate multi-sensor coordinate measuring machine and compared with the corresponding profiles of the designed lens surfaces. The fabricated lens profiles are then incorporated into CODE V to realistically model the three channels and also compare their performances with those of the nominal design. We can conclude that the performances of the two latter models are in a good agreement.
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