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Autofocusing based on power-spectra analysis
Applied Optics, 1994An autofocusing mechanism based on the concept of autocorrelation is described. The method may be performed optically with ring detectors in the Fourier domain or electronically with a special computing chip or software.
S, Jutamulia +3 more
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Compressed ISAR autofocusing: Experimental results
2012 IEEE Radar Conference, 2012This paper is reporting some experimental results of compressed inverse synthetic aperture radar (ISAR) imaging. The autofocusing procedure accepting sparse echoes is developed, which consists of range alignment and phase correction as in conventional ISAR processing.
null Daiyin Zhu +4 more
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Adaptive Optics for Autofocusing Eyeglasses
Imaging and Applied Optics 2017 (3D, AIO, COSI, IS, MATH, pcAOP), 2017Over 1 billion people worldwide including more than 100 million people in the United States of America alone suffer from an age-related eye condition known as presbyopia. Presbyopia is caused by a loss of focal accommodation of the crystalline lens inside the eye as the lens stiffens with age.
Nazmul Hasan +5 more
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Robust autofocusing propagation in turbulence
Chinese Physics BTurbulence in complex environments such as the atmosphere and biological media has always been a great challenge to the application of beam propagation in optical communication, optical trapping and manipulation. To overcome this challenge, this study comprehensively investigates the robust propagation of traditional Gaussian and autofocusing beams in ...
Na-Na 娜娜 Liu 刘 +7 more
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Arbitrary shaped abruptly autofocusing beams
Optics & Laser Technology, 2023Yunfeng Jiang, Wenlei Yu, Kehao Zeng
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A low complexity autofocusing technique
1995In this paper we propose an Inverse Synthetic Aperture Radar (ISAR) autofocusing technique based on very simple operations like Fast Fourier Transform (FFT) and minimisation of the Euclidean distance between one-dimensional functions. The technique represents a good compromise between the image focusing capability and the computational complexity and ...
BERIZZI, FABRIZIO, DIANI, MARCO
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