Improved chromatic performance of endomicroscope optics for broadband imaging

Gabriel C. Birch; Michael R. Descour; Brian P. McCall; Tomasz S. Tkaczyk

doi:10.1117/12.842049

24 February 2010 Improved chromatic performance of endomicroscope optics for broadband imaging

Gabriel C. Birch, Michael R. Descour, Brian P. McCall, Tomasz S. Tkaczyk

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.

Citation Download Citation

Gabriel C. Birch, Michael R. Descour, Brian P. McCall, and Tomasz S. Tkaczyk "Improved chromatic performance of endomicroscope optics for broadband imaging", Proc. SPIE 7558, Endoscopic Microscopy V, 75580P (24 February 2010); https://doi.org/10.1117/12.842049

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