Abstract
Qualitative and quantitative measurements of complex flows demand for fast single-shot fluorescence lifetime imaging (FLI) technology with high precision. A method, single-shot time-gated fluorescence lifetime imaging using three-frame images (TFI-TGFLI), is presented. To our knowledge, it is the first work to combine a three-gate rapid lifetime determination (RLD) scheme and a four-channel framing camera to achieve this goal. Different from previously proposed two-gate RLD schemes, TFI-TGFLI can provide a wider lifetime range 0.6 ~ 13ns with reasonable precision. The performances of the proposed approach have been examined by both Monte-Carlo simulations and toluene seeded gas mixing jet diagnosis experiments. The measured average lifetimes of the whole excited areas agree well with the results obtained by the streak camera, and they are 7.6ns (N2 = 7L/min; O2 < 0.1L/min) and 2.6ns (N2 = 19L/min; O2 = 1L/min) with the standard deviations of 1.7ns and 0.8ns among the lifetime image pixels, respectively. The concentration distributions of the quenchers and fluorescent species were further analyzed, and they are consistent with the experimental settings.
Highlights
Planar laser-induced fluorescence (PLIF) sensing technologies are widely used in many scientific fields, such as airflow, combustion, and plasma diagnostics [1] due to its ability to measure the concentration, temperature, pressure and velocity [2, 3]
For TFI-TGFLI, as the number of images acquired in a single-shot increases, the signal intensity of each image decreases, making the Fτ and FA curves of Gating Scheme 1 larger than optimized RLD (ORLD)
We proposed a new rapid lifetime determination scheme on a multi-channel framing camera to achieve single-shot fluorescence lifetime imaging based on three images, and we coined it as TFI-TGFLI
Summary
Planar laser-induced fluorescence (PLIF) sensing technologies are widely used in many scientific fields, such as airflow, combustion, and plasma diagnostics [1] due to its ability to measure the concentration, temperature, pressure and velocity [2, 3]. In 2012, Ehn et al achieved single-shot FLI of a toluene seeded gas mixture jet [21] using the same experimental setup as their earlier work [19], and they presented an evaluation algorithm, DIME (Dual Imaging and Modeling Evaluation), based on an ORLD scheme to evaluate image data. They estimated the lifetimes around 800ps with a standard deviation around 120ps (from 100 repeated measurements). The directions of the laser propagation and the gas jet are in +z axis and +x axis, respectively
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
