Acta Optica Sinica, Volume. 36, Issue 10, 1026014(2016)

Problems of Optical Imaging in Oceanic Turbulence

Pu Huan* and Ji Xiaoling
Author Affiliations
  • [in Chinese]
  • show less

    Difference of the modulation transfer function for long-exposure imaging between the oceanic turbulence and the atmospheric turbulence is compared. Applicability of the modulation transfer function for short-exposure imaging (SEMTF) in the oceanic turbulence is discussed. Moreover, effects of the oceanic turbulence parameters on the system resolution are studied in detail. Results show that the quality of imaging is better in the dominating temperature-induced turbulence than that in the dominating salinity-induced turbulence, i.e., the image contains more high-frequency components of the original image. The SEMTF study based on the Fried short-exposure theory is defective in the high-frequency region, but the applicability of SEMTF can be enhanced as the ratio of lens diameter to the spatial coherence radius and the path length increase. In addition, the resolution of imaging decreases, i.e., the quality of imaging is degraded, as the ratio of temperature and salinity of the seawater power spectrum increases, the dissipation rate of the seawater temperature variance increases, and the dissipation rate of the seawater unit mass turbulence kinetic energy decreases.

    Tools

    Get Citation

    Copy Citation Text

    Pu Huan, Ji Xiaoling. Problems of Optical Imaging in Oceanic Turbulence[J]. Acta Optica Sinica, 2016, 36(10): 1026014

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Special Issue:

    Received: Jun. 1, 2016

    Accepted: --

    Published Online: Oct. 12, 2016

    The Author Email: Huan Pu (puhuan_sicnu@163.com)

    DOI:10.3788/aos201636.1026014

    Topics