Evaluation and correction of aberrations in an optical correlator by phase-shifting interferometry

Iemmi, Claudio; Moreno, A.; Nicolás, Josep; Campos, Juan

doi:10.1364/ol.28.001117

Cited by 10 publications

(9 citation statements)

References 7 publications

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“…Zoom system has been widely applied to a variety important areas, such as medical and health, information technology, research education and national defense construction [1][2][3][4][5][6]. The conventional design is to use multiple solid lenses with fixed focal lengths.…”

Section: Introductionmentioning

confidence: 99%

P-27: An Optical Zoom Method Based On Spatial Light Modulator

Wei

Wang

et al. 2016

SID Symposium Digest of Technical Papers

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In this paper, an optical zoom method based on a spatial light modulator (SLM) is proposed. The SLM instead of the traditional solid lens is used in the method. By loading digital lenses with different focal lengths on the SLM, we can achieve the function of optical zoom. If we use two SLMs together and change the focal lengths of the digital lenses loaded on the two SLMs, we can change the magnification of the image and keep the image plane stationary. The experiments verify the feasibility of the proposed method.

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Section: Introductionmentioning

confidence: 99%

P-27: An Optical Zoom Method Based On Spatial Light Modulator

Wei

Wang

et al. 2016

SID Symposium Digest of Technical Papers

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“…Widespread application has been found for optical zoom systems in optical instruments and systems, including target detection, video surveillance, electronic equipment, and tracking [1][2][3][4][5][6]. In order to adjust the magnification of the zoom system, the most common design is to regulate the position between the components of the multiple optical elements mechanically.…”

Section: Introductionmentioning

confidence: 99%

Active optical zoom system

Wang

Shen

et al. 2014

Appl. Opt.

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In this work, we propose an active optical zoom system. The zoom module of the system is formed by a liquid lens and a spatial light modulator (SLM). By controlling the focal lengths of the liquid lens and the encoded digital lens on the SLM panel, we can change the magnification of an image without mechanical moving parts and keep the output plane stationary. The magnification can change from 1/3 to 3/2 as the focal length of the encoded lens on the SLM changes from infinity to 24 cm. The proposed active zoom system is simple and flexible, and has widespread application in optical communications, imaging systems, and displays.

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“…On the other hand, the introduction of liquid crystals permits the implementation of the interferometric methods by phase shifting [4]. In previous works [5,6] we proposed a PDI that uses liquid crystal displays. In the first case [5], the PDI was used to measure in situ aberrations in an optical correlator.…”

Section: Introductionmentioning

confidence: 99%

“…In previous works [5,6] we proposed a PDI that uses liquid crystal displays. In the first case [5], the PDI was used to measure in situ aberrations in an optical correlator. While in the second [6], the interferometer was used in digital holography applications.…”

Section: Introductionmentioning

confidence: 99%

Point diffraction interferometer with a liquid crystal monopixel

Ramírez¹,

Otón²,

Iemmi³

et al. 2013

Opt. Express

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In this work a novel point diffraction interferometer based on a variable liquid crystal wave plate (LCWP) has been implemented. The LCWP consists of a 3x3 cm(2) monopixel cell with parallel alignment. The monopixel cell was manufactured such that the electrode covers the entire surface except in a centered circular area of 50 μm of diameter. This circle acts as a point perturbation which diffracts the incident wave front giving rise to a spherical reference wave. By applying a voltage to the LCWP we can change the phase of the wave front that passes through the monopixel, except at the center. Phase shifting techniques are used in order to calculate the amplitude and phase distribution of the object wave front. The system allows a digital hologram to be obtained, and by using the Fresnel diffraction integral it is possible to digitally reconstruct the different planes that constitute the three dimensional object.

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Evaluation and correction of aberrations in an optical correlator by phase-shifting interferometry

Cited by 10 publications

References 7 publications

P-27: An Optical Zoom Method Based On Spatial Light Modulator

P-27: An Optical Zoom Method Based On Spatial Light Modulator

Active optical zoom system

Point diffraction interferometer with a liquid crystal monopixel

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