Hyperspectral Shack-Hartmann test

• Published in: Applied optics. Optical technology and biomedical optics Vol. 49; no. 28; p. 5399
• Main Authors: Birch, Gabriel C, Descour, Michael R, Tkaczyk, Tomasz S
• Format: Journal Article
• Language: English
• Published: United States 01-10-2010
• Subjects: Aberrometry - instrumentation; Diagnostic Techniques, Ophthalmological - instrumentation; Endoscopes; Equipment Design; Humans; Lenses; Miniaturization; Optics and Photonics; Polymethyl Methacrylate; Polystyrenes
• ISSN: 2155-3165
• DOI: 10.1364/AO.49.005399

A hyperspectral Shack-Hartmann test bed has been developed to characterize the performance of miniature optics across a wide spectral range, a necessary first step in developing broadband achromatized all-polymer endomicroscopes. The Shack-Hartmann test bed was used to measure the chromatic focal shift (CFS) of a glass singlet lens and a glass achromatic lens, i.e., lenses representing the extrema of CFS magnitude in polymer elements to be found in endomicroscope systems. The lenses were tested from 500 to 700 nm in 5 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 test lens and those obtained by experiment (maximum error of 12 μm for the singlet lens and 5 μm for the achromatic triplet lens). Future applications of the hyperspectral Shack-Hartmann test include measurements of aberrations as a function of wavelength, characterization of manufactured plastic endomicroscope elements and systems, and reverse optimization.