1. Date of download: 11/12/2016 Copyright © ASME. All rights reserved. From: Fluorescence and Fiber-Optics Based Real-Time Thickness Sensor for Dynamic Liquid Films J. Heat Transfer. 2009;132(3):031603-031603-12. doi:10.1115/1.4000045 Operating principle of a fluorescence sensor Figure Legend:

2. Date of download: 11/12/2016 Copyright © ASME. All rights reserved. From: Fluorescence and Fiber-Optics Based Real-Time Thickness Sensor for Dynamic Liquid Films J. Heat Transfer. 2009;132(3):031603-031603-12. doi:10.1115/1.4000045 Symmetrical arrangement of R probes around an I probe Figure Legend:

3. Date of download: 11/12/2016 Copyright © ASME. All rights reserved. From: Fluorescence and Fiber-Optics Based Real-Time Thickness Sensor for Dynamic Liquid Films J. Heat Transfer. 2009;132(3):031603-031603-12. doi:10.1115/1.4000045 Greater detail on the neighborhood of illuminating (I) and receiving (R) fiber tips Figure Legend:

4. Date of download: 11/12/2016 Copyright © ASME. All rights reserved. From: Fluorescence and Fiber-Optics Based Real-Time Thickness Sensor for Dynamic Liquid Films J. Heat Transfer. 2009;132(3):031603-031603-12. doi:10.1115/1.4000045 Absorbance spectrum of a bi-acetyl doped FC-72 solution (C=0.121%) Figure Legend:

5. Date of download: 11/12/2016 Copyright © ASME. All rights reserved. From: Fluorescence and Fiber-Optics Based Real-Time Thickness Sensor for Dynamic Liquid Films J. Heat Transfer. 2009;132(3):031603-031603-12. doi:10.1115/1.4000045 Fluorescent intensity versus wavelength curves of a bi-acetyl doped FC-72 solution for an excitation light of λ=425 nm and concentration of 0.054% (scaling factor is proportional to the absorbance) Figure Legend:

6. Date of download: 11/12/2016 Copyright © ASME. All rights reserved. From: Fluorescence and Fiber-Optics Based Real-Time Thickness Sensor for Dynamic Liquid Films J. Heat Transfer. 2009;132(3):031603-031603-12. doi:10.1115/1.4000045 Schematic of the experimental setting for the developed sensor Figure Legend:

7. Date of download: 11/12/2016 Copyright © ASME. All rights reserved. From: Fluorescence and Fiber-Optics Based Real-Time Thickness Sensor for Dynamic Liquid Films J. Heat Transfer. 2009;132(3):031603-031603-12. doi:10.1115/1.4000045 Variation in transmitted light through receiving fiber of incident red laser light at angles from 0 deg to 90 deg from the receiving fiber tip as measured with a photomultiplier tube Figure Legend:

8. Date of download: 11/12/2016 Copyright © ASME. All rights reserved. From: Fluorescence and Fiber-Optics Based Real-Time Thickness Sensor for Dynamic Liquid Films J. Heat Transfer. 2009;132(3):031603-031603-12. doi:10.1115/1.4000045 Scaled schematic of preliminary concept probe. Note that the zones within the primary illumination cone from which fluorescent light is able to enter one or more receiving fibers directly within their acceptance cones (dark regions where the primary illumination cone and receiving fiber acceptance cone(s) intersect). Figure Legend:

9. Date of download: 11/12/2016 Copyright © ASME. All rights reserved. From: Fluorescence and Fiber-Optics Based Real-Time Thickness Sensor for Dynamic Liquid Films J. Heat Transfer. 2009;132(3):031603-031603-12. doi:10.1115/1.4000045 Appearance of a nonmonotonic D−Sf ∣ L-V curve if NP is not sufficiently small with respect to D. This test was done under conditions of a higher LD excitation current. The filtering is described in Ref.. Figure Legend:

10. Date of download: 11/12/2016 Copyright © ASME. All rights reserved. From: Fluorescence and Fiber-Optics Based Real-Time Thickness Sensor for Dynamic Liquid Films J. Heat Transfer. 2009;132(3):031603-031603-12. doi:10.1115/1.4000045 Dynamic liquid film measurement test that yields time-varying thicknesses, where the static thickness (not shown) is designated as d0: (a) with dynamic response d(t1)=d1 d0 Figure Legend: