Opto-Electronic Engineering, Volume. 49, Issue 4, 210318(2022)
Parameters optimization of FLEET optical system
Fig. 2. Scaling calibration. (a) Original scale; (b) After threshold segmentation; (c) After tilt correction
Fig. 3. Air fluorescent filament images excited by femtosecond laser with different focal length and laser energy. (a)~(c) With 300 mm focus length and 1 mJ, 2 mJ and 3 mJ laser energy respectively; (d)~(f) With 1000 mm focus length and 1 mJ, 2 mJ and 3 mJ laser energy respectively
Fig. 4. Process for definition of effective area of fluorescent filament. (a) Projection directions; (b) One dimension curve of projection along x direction, Iy; (c) Projections of signal and background along y direction, Is and In ; (d) Isx curve before and after filtering in space frequency domain; (e) After space frequency filtering of Isx and Inx; (f) Effective area of fluorescent filament
Fig. 5. Geometric feature extraction of fluorescent filament. (a) Result of binarization; (b) Center line extraction
Fig. 6. Fluorescent filament SNR and length vs laser power and focal length. (a) SNR curve; (b) Filament length curve
Fig. 7. The normalized peak density of air fluorescent filament for different time delay under different pressures
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Jianxin Wang, Shuang Chen, Li Chen, Wenbin Yang, Rong Qiu, Fuzhong Bai, Tonghong Li. Parameters optimization of FLEET optical system[J]. Opto-Electronic Engineering, 2022, 49(4): 210318
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Received: Sep. 30, 2021
Accepted: --
Published Online: May. 24, 2022
The Author Email: Wang Jianxin (;;), Chen Li (;;), Bai Fuzhong (;;)