Polychromatic dynamic holographic one-way image correction using liquid crystal SLMs

Berenberg, Vladimir A.; Leshchev, Alexey; Soms, Leonid N.; Vasil'ev, Michael V.; Venediktov, Vladimir Yu.; Onokhov, A. P.; Beresnev, L. A.

doi:10.1016/s0030-4018(99)00243-6

Cited by 7 publications

(4 citation statements)

References 17 publications

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“…In reality, due to the inevitable light loss in the modulator elements, the diffraction efficiency is even lower. This is a drawback of the direct method for holographic corrector recording, which was used in [4][5][6][7]. This drawback can be overcome by sophisticating the corrector recording schemes [8,9], as a result of which dynamic holographic gratings with an asymmetric fringe profile can be recorded.…”

Section: Introduction Thin Dynamic Holograms With An Asymmetric Frinmentioning

confidence: 99%

10.1007/s11449-008-2024-7

2010

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Section: Introduction Thin Dynamic Holograms With An Asymmetric Frinmentioning

confidence: 99%

10.1007/s11449-008-2024-7

2010

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“…Distorted wave fronts have been characterized with interferometry, 1 holography, 2 phase diversity, 3,4 modal analysis, 5 and wave-front sensors. 6 -8 A distorted wave front can be corrected 9,10 with adaptive optics, 11,12 liquid-crystal phase modulators, [13][14][15] or digital deconvolution from wave-front sensing. 16 We describe here a method of digital wave-front sensing and deconvolution based on the recently described astigmatic coherence sensor ͑ACS͒.…”

Section: Introductionmentioning

confidence: 99%

Digital refraction distortion correction with an astigmatic coherence sensor

2002

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We demonstrate the sensing and correction of an isoplanatic refractive distortion (not lens aberrations), using the complete measurement of the partially coherent field in an aperture that the previously described astigmatic coherence sensor provides. Isoplanatic distortions, and in general distortions that do not cause energy loss, maintain the orthogonality of the coherent modes. We use the fact that a common distortion will occur to all coherent modes to separate the distortion from the source behind it, rather than requiring a reference source at a different wavelength. Digital deconvolution was performed on the full four-dimensional partially coherent field for simultaneously computing the distortion and the source intensity distribution.

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“…Especially spectacular results were demonstrated (see, for example, [3][4][5]) with the use of dynamic holographic correctors, recorded in optically addressed liquid crystal spatial light modulators (OA LC SLM) [6]. Special feature of such devices is that in this case dynamic holograms are practically thin, and thus free from spectral and angular limitations, usual for thick holograms.…”

Section: Introductionmentioning

confidence: 99%

“…to the following relationship: I(t,x,y) Erf + EJ2 irr[1 + pcos[(t,x,y)_ + Prd(X,Y)_rf(X,Y)lO}}(3) Here A = /(sin + sinO); I = 'rd If 2fiif/Irr . Taking into account the initial conditions:(O, x, y) = 0, 1(0, x, y) = 'rr @)[1 + p(O) cos -rd(x, y) + ''rf (x, y)}+ }}(4) the relationships(1)and(3)completely solve the problem of evaluation of spatial distribution of light intensity I(t,x,y) on the photosensitive layer of OA SLM and thus of the spatial profile of the dynamic grating y1(t,x,y).…”

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confidence: 99%

<title>Analogous, completely optical scheme of record of blazed dynamic holograms</title>

et al. 2002

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In recent experiments of M.Gruneisen et al., the possibility was shown to record the so-called "blazed" dynamic holograms in optically addressed liquid crystal spatial light modulator (OA LC SLMs). In such holograms the phase retardation distribution across the holographic fringe has a saw-like shape (asymmetrical triangle). Such holograms can provide a very high (in a limit -nearly 100%) diffraction efficiency. In previous experiments such "blazed" holograms were recorded with the use of digital computer methods. We propose a novel, analogous and completely optical approach to the record of such holograms. One can record a saw-like profile of phase retardation in an OA SLM, placed into the nonlinear interferometer. In such interferometer the probe wave reads out the phase retardation in SLM, interferes with reference wave, and the phase retardation in the said SLM is controlled by their interference pattern. The results of the direct numerical simulation of the system show that by this method can be formed the saw-like grating, providing nearly 100% diffraction efficiency. Presented is the analysis of the system dynamics and stability.

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Polychromatic dynamic holographic one-way image correction using liquid crystal SLMs

Cited by 7 publications

References 17 publications

10.1007/s11449-008-2024-7

10.1007/s11449-008-2024-7

Digital refraction distortion correction with an astigmatic coherence sensor

<title>Analogous, completely optical scheme of record of blazed dynamic holograms</title>

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