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    • Rance Fortenberry, Ph.D.

    Director of Technology, Alluxa

    Rance Fortenberry, Ph.D., is director of technology at Alluxa (Santa Rosa, CA).

    FIGURE 1. A dual-band IR filter used to monitor climate change exhibits negligible absorption in the water band and low passband ripple.
    Optics

    Photonics Products: Optical Filters - Multiband coated filters redefine performance standards for scientific applications

    Amber Czajkowski
    June 13, 2016
    Advances in thin-film technology have given rise to a new class of multiband coatings.
    FIGURE 1. (a) Filter squareness is a direct function of cavity count. (b) shows repeatability of high-cavity-count-filters, with four consecutive runs of fully blocked, high-cavity-count emission filters run in two different chambers; and (c) shows blocking levels of Alluxa's high-cavity-count filters, where the noise floor on blocking measurements generally is between 60 and 80 dB.
    Optics & Design

    Fluorescence Imaging: Optical filtering basics for life sciences

    Amber Czajkowski
    Dec. 14, 2015
    Optical filters can have a dramatic effect on outcomes in life sciences. These principles demonstrate how next-generation thin film enhances excitation and emission in fluorescence...