Liquid Crystal Microlenses for Autostereoscopic Displays

Algorri, José Francisco; Urruchi, V.; García‐Cámara, Braulio; Sánchez‐Pena, José Manuel

doi:10.3390/ma9010036

Cited by 26 publications

(15 citation statements)

References 77 publications

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“…For more specific topics, the reader can find some useful reviews, e.g. fast-response time LC microlenses 43 , LC microlenses for autostereoscopic displays 44 , design and fabrication 45 , LC contact lenses for the correction of presbyopia 46 or recent advances in LC lenses 47 . Although the main structures were established several years ago, there is still room for new proposals.…”

Section: In This Work a Novel Technique To Create Positive-negative mentioning

confidence: 99%

Positive-negative tunable liquid crystal lenses based on a microstructured transmission line

Algorri

Morawiak

Bennis

et al. 2020

Sci Rep

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In this work, a novel technique to create positive-negative tunable liquid crystal lenses is proposed and experimentally demonstrated. This structure is based on two main elements, a transmission line acting as a voltage divider and concentric electrodes that distribute the voltage homogeneously across the active area. This proposal avoids all disadvantages of previous techniques, involving much simpler fabrication process (a single lithographic step) and voltage control (one or two sources). In addition, low voltage signals are required. Lenses with switchable positive and negative focal lengths and a simple, low voltage control are demonstrated. Moreover, by using this technique other optical devices could be engineered, e.g. axicons, Powell lenses, cylindrical lenses, Fresnel lenses, beam steerers, optical vortex generators, etc. For this reason, the proposed technique could open new venues of research in optical phase modulation based on liquid crystal materials.

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Section: In This Work a Novel Technique To Create Positive-negative mentioning

confidence: 99%

Positive-negative tunable liquid crystal lenses based on a microstructured transmission line

Algorri

Morawiak

Bennis

et al. 2020

Sci Rep

View full text Add to dashboard Cite

show abstract

“…In certain cases, such as free-space optical phase spatial modulators, the low weight, tunable focus, low power consumption and broad range of achievable applications renders LC unique in comparison to other technologies. Nowadays, there is increased research effort to engineer novel structures capable of generating highly performing LC-tunable components with advanced functionalities, among which large-area lenses 2 – 4 , multi-focal 5 , high fill-factor 6 microlenses, tunable zooming 7 , beam steering 8 , diffraction gratings 9 , aberration correctors 10 , 11 , tunable optics for astronomical observations 12 , 3D vision applications 13 , 14 , optical filters 15 , optical switches 16 , micro-axicon arrays 17 , axicons 18 , 19 , and optical vortices 20 – 23 .…”

Section: Introductionmentioning

confidence: 99%

Multifunctional light beam control device by stimuli-responsive liquid crystal micro-grating structures

Algorri

Morawiak

Zografopoulos

et al. 2020

Sci Rep

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there is an increasing need to control light phase with tailored precision via simple means in both fundamental science and industry. one of the best candidates to achieve this goal are electro-optical materials. In this work, a novel technique to modulate the spatial phase profile of a propagating light beam by means of liquid crystals (Lc), electro-optically addressed by indium-tin oxide (ito) grating microstructures, is proposed and experimentally demonstrated. A planar Lc cell is assembled between two perpendicularly placed ito gratings based on microstructured electrodes. By properly selecting only four voltage sources, we modulate the LC-induced phase profile such that non-diffractive Bessel beams, laser stretching, beam steering, and 2D tunable diffraction gratings are generated. In such a way, the proposed Lc-tunable component performs as an all-in-one device with unprecedented characteristics and multiple functionalities. the operation voltages are very low and the aperture is large. Moreover, the device operates with a very simple voltage control scheme and it is lightweight and compact. Apart from the demonstrated functionalities, the proposed technique could open further venues of research in optical phase spatial modulation formats based on electro-optical materials.

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“…Three-dimensional (3D) display provides vivid viewing experiences and is expected to be widely used in areas such as entertainment, advertising, national defense, and scientific research [1,2]. Viewing through parallax barriers and lenticular sheets are the dominant autostereoscopic technologies [3][4][5]. Compared to the low transmittance of parallax barrier, lenticular sheet-based technique is better for outdoor use [6].…”

Section: Introductionmentioning

confidence: 99%

Study on the Reduction Effect of Stereo Depth Caused by Lens Aberration in Lenticular-Based Autostereoscopic Displays

et al. 2019

Applied Sciences

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Autostereoscopic displays employing lenticular sheets have broad applications due to the high transmittance of lenticular sheet. However, due to the restriction of lens array design and processing, the imperfect image of lenses can reduce the quality experience of autostereoscopic displays. Stereo depth is one of the qualities of experience parameters, which relates to the three-dimensional effect. Therefore, to quantize the reduction effect of stereo depth caused by lens aberration is of great value. In this paper, we implement a binocular model of an autostereoscopic display system with lens array to analyze this effect, which is different from the previously used monocular model. Two receivers in the positions of viewer’s eyes are set on the viewing plane, and a similar factor is defined to evaluate the difference of light spots perceived by the two receivers. When the similar factor exceeds a certain value, the two spots cannot be fused in the brain, thus restricting the perceived stereo depth. Both in simulation and experiment, a sudden decrease of the similar factor is observed when the viewing angle exceeds 16°. In the subjective experiment, all the sixteen viewers feel a sudden decrease of stereo depth when the viewing angle exceeds 16°, which further verifies the validity of the model. The model and the method are significant for improving the viewing experience of autostereoscopic displays and providing a guidance on autostereoscopic display system designing.

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Liquid Crystal Microlenses for Autostereoscopic Displays

Cited by 26 publications

References 77 publications

Positive-negative tunable liquid crystal lenses based on a microstructured transmission line

Positive-negative tunable liquid crystal lenses based on a microstructured transmission line

Multifunctional light beam control device by stimuli-responsive liquid crystal micro-grating structures

Study on the Reduction Effect of Stereo Depth Caused by Lens Aberration in Lenticular-Based Autostereoscopic Displays

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