24 February 2010 Improved chromatic performance of endomicroscope optics for broadband imaging
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Proceedings Volume 7558, Endoscopic Microscopy V; 75580P (2010) https://doi.org/10.1117/12.842049
Event: SPIE BiOS, 2010, San Francisco, California, United States
Abstract
The long-term purpose of this project is to build inexpensive endomicroscope systems from optical plastics that operate over a wide spectral range. We report on a design of a plastic achromatic doublet using PMMA and optical grade polystyrene, as well as a design of an achromatized endomicroscope system using the same materials. The fabrication of such optical elements and systems is feasible using methods such as diamond turning or diamond milling. Finally, a multispectral Shack-Hartmann test bed has been created that can measure the chromatic focal shift of a lens over a broad spectral band (from 400 nm to 1,000 nm) and detect shifts in focal length down to 90 nanometers. The multispectral Shack-Hartmann test bed has been used to characterize the chromatic focal shift of a glass singlet lens and a glass achromat triplet lens. The lenses were tested from 500 nm to 700 nm in 5 nm and 10 nm steps, respectively. In both cases, we found close agreement between test results obtained from a ZEMAX model of the test bed and those obtained by experiment.
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Gabriel C. Birch, Gabriel C. Birch, Michael R. Descour, Michael R. Descour, Brian P. McCall, Brian P. McCall, Tomasz S. Tkaczyk, Tomasz S. Tkaczyk, } "Improved chromatic performance of endomicroscope optics for broadband imaging", Proc. SPIE 7558, Endoscopic Microscopy V, 75580P (24 February 2010); doi: 10.1117/12.842049; https://doi.org/10.1117/12.842049
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