• Acta Optica Sinica
  • Vol. 43, Issue 12, 1201003 (2023)
Junxin Zhang1、2、3, Haiping Mei1、3、*, Yichong Ren1、3, and Ruizhong Rao1、3
Author Affiliations
  • 1Key Laboratory of Atmospheric Optics, Chinese Academy of Sciences, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, China
  • 2Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230026, Anhui, China
  • 3Advanced Laser Technology Laboratory of Anhui Province, Hefei 230037, Anhui, China
  • show less
    DOI: 10.3788/AOS221854 Cite this Article Set citation alerts
    Junxin Zhang, Haiping Mei, Yichong Ren, Ruizhong Rao. Fold-Path Atmospheric Coherence Length Measurement by Laser-Active Illumination Imaging[J]. Acta Optica Sinica, 2023, 43(12): 1201003 Copy Citation Text show less
    Schematic of the r0 measurement comparison experiment
    Fig. 1. Schematic of the r0 measurement comparison experiment
    Schematic of the active illumination laser beam imaging experiment
    Fig. 2. Schematic of the active illumination laser beam imaging experiment
    r0 measurement results of fold-path DIMM and traditional DIMM on October 27, 2021
    Fig. 3. r0 measurement results of fold-path DIMM and traditional DIMM on October 27, 2021
    Ratio of fold-path DIMM and traditional DIMM measurement results on October 27, 2021
    Fig. 4. Ratio of fold-path DIMM and traditional DIMM measurement results on October 27, 2021
    Comparison of Cn2 inversion by centroid drift and DIMM under the circumstances of unfocused beam. (a) Distribution of measurement results; (b) correlation analysis between two measurements
    Fig. 5. Comparison of Cn2 inversion by centroid drift and DIMM under the circumstances of unfocused beam. (a) Distribution of measurement results; (b) correlation analysis between two measurements
    Comparison of Cn2 inversion by centroid drift and DIMM under the circumstances of focused beam. (a) Distribution of measurement results; (b) correlation analysis between two measurements
    Fig. 6. Comparison of Cn2 inversion by centroid drift and DIMM under the circumstances of focused beam. (a) Distribution of measurement results; (b) correlation analysis between two measurements
    InstrumentParameter
    DIMM

    Focal length:2.845 m

    Subaperture diameter:0.12 m

    Subaperture separation:0.24 m

    Pixel size:4.54 µm

    Digit:14 bit

    Exposure time:200 µs

    Meade

    Model:ACF14F8

    Aperture:355 mm

    Focal length:2.845 m

    Allied Vison GT 1920 CCD

    Exposure range:10 µs-26.8 s

    Pixel size:4.54 µm

    Sample frequency up to 40.7 frame/s

    Resolution:1936 pixel×1456 pixel

    Table 1. Parameters of fold-path DIMM experiment
    InstrumentParameter
    DIMM

    Focal length:3.55 m

    Subaperture diameter:0.12 m

    Subaperture separation:0.24 m

    Pixel size:3.75 µm

    Digit:14 bit

    Exposure time:200 µs

    BOSMA

    Model:MK24020

    Aperture:200 mm

    Focal length:1200 mm

    ASI 290MM CCD

    Exposure range:32 µs-2000 s

    Pixel size:2.9 µm

    Sample frequency:330 Hz/560 Hz

    Resolution:1936 pixel×1096 pixel

    Table 2. Parameters of the active illumination laser beam imaging experiment
    Junxin Zhang, Haiping Mei, Yichong Ren, Ruizhong Rao. Fold-Path Atmospheric Coherence Length Measurement by Laser-Active Illumination Imaging[J]. Acta Optica Sinica, 2023, 43(12): 1201003
    Download Citation