Detection of Small Displacements Using of Optical Diffractive Correlator

Gnatovskiy, O.; Bugaychuk, S.; Gnatovskyy, V.O.; Sidorenko, A.; Negriyko, A.M.

doi:10.1364/fio.2020.jth4a.7

Cited by 1 publication

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“…Another alternative is to use a diffractive correlator, that also includes, additional to the elements in the classical incoherent light correlator, some periodic diffractive elements, such as diffractive gratings, capable of splitting the incident light into several secondary beams. This method can find applications in several correlation schemes, with good results in determining the correlation product of the intensity spectra [ 54 , 55 ].…”

Section: Classification and Overview Of The Principles Of Optical Cor...mentioning

confidence: 99%

“…A few different architectures of optical correlators in incoherent light have been proposed lately. Gnatovskiy et al [ 55 ] employed a diffractive optical correlator in incoherent light for the detection of small displacements of objects. To accurately determine these displacements, they developed a method, based on the mutual spatial shift, in the transverse direction, between two diffraction gratings contained in the correlator setup.…”

Section: Recent Applications and Implementations Of Optical Correlatorsmentioning

confidence: 99%

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Optical Correlators for Cryptosystems and Image Recognition: A Review

Drăgulinescu

2023

Sensors

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Optical correlators are efficient optical systems that have gained a wide range of applications both in image recognition and encryption, due to their special properties that benefit from the optoelectronic setup instead of an all-electronic one. This paper presents, to the best of our knowledge, the most extensive review of optical correlators to date. The main types are overviewed, together with their most frequent applications in the newest contributions, ranging from security uses in cryptosystems, to medical and space applications, femtosecond pulse detection and various other image recognition proposals. The paper also includes a comparison between various optical correlators developed recently, highlighting their advantages and weaknesses, to gain a better perspective towards finding the best solutions in any specific domain where these devices might prove highly efficient and useful.

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Section: Classification and Overview Of The Principles Of Optical Cor...mentioning

confidence: 99%

Section: Recent Applications and Implementations Of Optical Correlatorsmentioning

confidence: 99%