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.

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

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

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...