Distortion aberration correction device fabricated with liquid crystal lens array

Hsieh, Chia Ting; Hsu, Yu Feng; Chung, Chia Wei; Chen, Ming Fei; Su, Wei; Huang, Chi Yen

doi:10.1364/oe.21.001937

Cited by 13 publications

(5 citation statements)

References 11 publications

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“…8. In our previous paper, for pincushion distortion, the TV distortion of the LC-lens array inserted optical system can be reduced from 4.3% to 1.2% [6].…”

Section: Resultsmentioning

confidence: 96%

“…The redirection of partial propagated rays into the paraxial region of the optical system is another possible means of reducing aberrations. Microlens and LC lens arrays have recently been demonstrated to be distortion correctors [5,6]. Notably, the operation of an LC lens array based-distortion corrector requires the utilization of a polarizer.…”

Section: Introductionmentioning

confidence: 99%

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Polarization-independent distortion corrector fabricated using polymer-dispersed liquid crystals

et al. 2014

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We demonstrate a polarization-independent distortion corrector fabricated using a polymer-dispersed liquid crystal (PDLC) cell placed on the intermediate image plane of an optical system. At low voltage, a hazy PDLC cell scatters the incident rays and redirects the off-axis propagated chief ray. The chief ray approaches the principal point of the lens element, thereby decreasing image distortion. At high voltage, the PDLC cell becomes transparent, thereby restoring the image distortion. The PDLC-based distortion corrector is an easy-to-fabricate universal device that can be applied to various optical systems. With a large lens diameter, the distortion of a PDLC-corrected image is approximately 1/5 of that of an uncorrected image.

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“…8. In our previous paper, for pincushion distortion, the TV distortion of the LC-lens array inserted optical system can be reduced from 4.3% to 1.2% [6].…”

Section: Resultsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Polarization-independent distortion corrector fabricated using polymer-dispersed liquid crystals

et al. 2014

Self Cite

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“…Unlike a liquid lens, a solid tunable lens system based on polymer material has proposed been, but the lens actuation mechanism, tuning ability and optical structure still need optimization [15]. A liquid crystalline lens is another kind of tunable lens which uses a liquid crystalline material as the optical medium and adjusts the lens focus by altering its refractive index [16][17][18][19], but the optical properties of this type of lens are usually affected by polarization effects and it has a limited zooming range.…”

Section: Introductionmentioning

confidence: 99%

A bio-inspired optical system with a polymer membrane and integrated structure

Wang¹

2016

Bioinspir. Biomim.

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A bio-inspired optical imaging system with a polymer membrane and integrated structure is proposed. Similar to the human eye, the presented system has a biomimetic multilayered optical structure and utilizes a solid-liquid mixed tunable lens as the variable-focus unit. The focal length of the imaging system can be adjusted flexibly through the deformation of the tunable lens when it is compressed. A detailed description of the design principle, materials and fabrication process of the system is presented. The deformation property, adjustable range and surface roughness of the tunable lens are measured. Images under different displacement loads are captured, and the relationships among the back focal length (BFL) and effective focal length (EFL) of the system and the change in radius of the tunable lens are analyzed. A 7.6 times variation of the BFL is achieved through a tiny alteration in radius of 1.2 mm. All the measured resolutions during the deformation stage are larger than 40 line pairs mm, and the imaging system shows good optical quality and stability. The proposed optical system is of interest for the development of compact and stable imaging systems with a large zooming range.

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“…Until now, numerous types of LC lenses have been proposed such as 3D sensing system 1 , Three-dimensional imaging system 2 and Optical tunable liquid crystal lens [3][4][5] etc. Also various challenges to make a better liquid crystal lens are demonstrated as photo-polymerized liquid crystal lenses with high applying voltage 6 either complicated structure but good focusing property 7 even a method is developed to reduce the distortion in the optical system based on liquid crystal lens array for 200 μm aperture size which is impossible to extract three-dimensional image 8 liquid crystal lens with low applying voltage 9-10 stripe-like lenticular liquid crystal lens [11][12][13] liquid lens actuated by liquid crystal pistons 14 . Since liquid crystal lenses are thin, tunable in focus and electrically switchable to 2D/3D modes, it seems it is a good candidate to be used in endoscope to enhance endoscope imaging system whereas endoscopes usually have a solid lens with few millimeter diameters.…”

Section: Introductionmentioning

confidence: 99%