Annular liquid crystal spatial light modulator for beam shaping and extended depth of focus

Solodar, Asi; Klapp, Iftach; Abdulhalim, Ibrahim

doi:10.1016/j.optcom.2014.02.066

Cited by 13 publications

(4 citation statements)

References 26 publications

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“…The temporally altered diffraction light beams used to irradiate a motionless object [8]. Hence the LC SLM, which is a real time electro-optic tool, proficient of moderating the optical characteristics of an optical wave front in space and time [9] . It represents an adaptive tool in optics combined in various optical systems and it provides a regulatory improvement of the production of these systems [10].…”

Section: Msc: 30c45 30c50mentioning

confidence: 99%

optical patterns controlled by computerized spatial light modulator

Naser¹

2020

QJPS

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In this work, a contemporary optical system is designed using a technology of spatial light modulator (SLM). This system is depending on the ability of altering light beam into different optical patterns according to a signal feedback injected computationally to the SLM. The effects of control parameters on the SLM operation are studied such us brightness (B) which determines the constant DC voltage applied to SLM pixels, and contrast (C) determines the maximum AC voltage amount that can be applied to the SLM. The influences of the transmission linearity of image intensity are controlled by the gamma adjustment which can be used to align non linearity of image intensity. The grey scale is used to control and imagine which signals corresponding to grey levels and image location. The resolution and orientation of the obtained images are altered by the screen format to make optical experiments more satisfied, hence different ratios of amplitude and phase modulation can be understood.

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Section: Msc: 30c45 30c50mentioning

confidence: 99%

optical patterns controlled by computerized spatial light modulator

Naser¹

2020

QJPS

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“…11 We have used the EASLM for tunable focusing, extended depth of focus, and overextended depth of focus using time multiplexing of several phase masks. [12][13][14] Continued on next page In summary, we have harnessed LC devices for non-display applications, in particular for optical imaging, which we have identified as a field ripe to be transformed by tailored, cost-effective LC devices. The next steps include improving the alignment quality and speed of the LC devices as well as reducing the number of voltage channels to be controlled.…”

Section: 1117/21201409005605 Page 3/4mentioning

confidence: 99%

Liquid crystal devices tailored for specific imaging applications

Abdulhalim¹

2014

SPIE Newsroom

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“…Liquid crystal displays (LCD) are amplitude modulators mostly used as displays in laptops, TVs, cellphones, and tablets for years [4][5][6][7]. The other kind of modulators, phase modulators, have applications such as electrically controlled lenses [8][9][10], optical tweezers [11,12], laser beam shaping [13,14], 3D holographic displays [15], and laser wavelength control [16,17].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the optical properties of the liquid crystal-based devices via Mueller matrix formalism

Polat¹

2018

Turk J Phys

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Abstract:A model approach for the Mueller matrix (MM) of the twisted nematic liquid crystal spatial light modulator (TNLC-SLM) was proposed. In the first part of the study, the MM of the TNLC cell in the absence of applied voltage was investigated both theoretically and experimentally. In the second part, the model approach was improved by considering the reorientation of both tilt and azimuth angles of the liquid crystal (LC) molecules in the presence of applied voltage.Comparison of the theoretical MM elements with the experimental ones from the literature showed that, instead of decaying exponentially, the azimuth angle rotates with respect to the cell walls in a critical voltage range before the molecules are completely untwisted. It also pointed out that the effect of the tilt and the azimuth angles of the molecules on the optical properties of the light travelling in the LC cell could change depending on the polarization state of the input light and the voltage applied to the cell.

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Annular liquid crystal spatial light modulator for beam shaping and extended depth of focus

Cited by 13 publications

References 26 publications

optical patterns controlled by computerized spatial light modulator

optical patterns controlled by computerized spatial light modulator

Liquid crystal devices tailored for specific imaging applications

Investigation of the optical properties of the liquid crystal-based devices via Mueller matrix formalism

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