Wavefront sensor based on the Talbot effect with the precorrected holographic grating

Podanchuk, Dmytro V.; Kurashov, Vitalij N.; Goloborodko, Andrey A.; Danko, Volodymyr P.; Kotov, Myhailo M.; Goloborodko, N.S.

doi:10.1364/ao.51.00c125

Cited by 21 publications

(4 citation statements)

References 5 publications

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“…The image is distorted when grating is illuminated by non-plane wavefront [26] and degree of the image distortion describes the measured wavefront. It should be noted, that the restoration procedure for Talbot sensor is identical to Shack-Hartman one [23]. However, during optical wave propagation in the measuring channel random amplitude variations arises that lead to the local image distortions and can affect on the measuring errors of optical wavefront reconstruction [8].…”

Section: Introductionmentioning

confidence: 99%

Aberration measurements by a Talbot wavefront sensor in the presence of intensity variations

Kotov¹,

Danko²,

Goloborodko³

2023

J. Opt. Soc. Am. B

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Paper deals with the theoretical investigations of measurement accuracy of optical aberrations by Talbot wavefront sensor in the presence of random amplitude variations. Theoretical prediction of intensity distribution for gratings of any type based on their spatial spectrum is obtained, and it is shown that grating is fully restored in Talbot plane even for the high fraction of random amplitude. The possibilities of self-imaging phenomenon is investigated based on the simulation results. Simulation results show that pit displacement error increases when the correlation length decreases or when grating spatial spectrum increases. It is found that for defocus aberration intensity variations decrease measured defocus value and increment of aberrations of same order (oblique and vertical astigmatisms).

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Section: Introductionmentioning

confidence: 99%

Aberration measurements by a Talbot wavefront sensor in the presence of intensity variations

Kotov¹,

Danko²,

Goloborodko³

2023

J. Opt. Soc. Am. B

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“…On the contrary, if the grating period grows, the sensor sensitivity also increases, but the measurement range decreases. This problem can be solved by applying holographic microlens arrays in the Shack-Hartmann sensor [11] and holographic gratings in the Talbot one [12]. However, this is rather a laborious procedure.…”

Section: Introductionmentioning

confidence: 99%

Talbot Sensor with Diffraction Grating Adaptation to Wavefront Aberrations

et al. 2015

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The results obtained at simulating the functioning of an adaptive sensor based on the Talbot effect are reported. The input grating period was varied depending on the examined wavefront shape and provided the constant observation plane corresponding to the Talbot plane for a plane wave. Using the spherical and astigmatic wavefronts as an example, it is shown that this method can make the sensor measurement range several times wider, by retaining the original angular sensitivity. K e y w o r d s: wavefront, Talbot effect, wavefront sensor.

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“…The shifts of the properly chosen parts of the image provide the data about the wavefront slopes. The wavefront reconstruction procedure is similar to that which is used with the Shack-Hartmann sensor [13,14].…”

Section: Introductionmentioning

confidence: 99%

Bottlenecks of the wavefront sensor based on the Talbot effect

et al. 2014

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Physical constraints and peculiarities of the wavefront sensing technique, based on the Talbot effect, are discussed. The limitation on the curvature of the measurable wavefront is derived. The requirements to the Fourier spectrum of the periodic mask are formulated. Two kinds of masks are studied for their performance in the wavefront sensor. It is shown that the boundary part of the mask aperture does not contribute to the initial data for wavefront restoration. It is verified by experiment and computer simulation that the performance of the Talbot sensor, which meets established conditions, is similar to that of the Shack-Hartmann sensor.

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Wavefront sensor based on the Talbot effect with the precorrected holographic grating

Cited by 21 publications

References 5 publications

Aberration measurements by a Talbot wavefront sensor in the presence of intensity variations

Aberration measurements by a Talbot wavefront sensor in the presence of intensity variations

Talbot Sensor with Diffraction Grating Adaptation to Wavefront Aberrations

Bottlenecks of the wavefront sensor based on the Talbot effect

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