Algorithm research on microstructure distribution on the bottom surface of an integrated micro-optical light guide plate

Xu, Peng; Huang, Yué; Su, Zhijie; Zhang, Xu‐Lin

doi:10.1364/ao.53.001322

Cited by 21 publications

(10 citation statements)

References 9 publications

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“…Based on the research on sub-wavelength optical design and application accumulated by our research group [10][11][12][13][14][15][16][17][18][19], this paper proposes a method based on a simple periodic binary sub-wavelength structure [12,13] to design a terahertz broadband filter. A silicon-based terahertz wideband filter with a center frequency of 4.07 THz was designed.…”

Section: Introductionmentioning

confidence: 99%

Terahertz Wideband Filter Based on Sub-Wavelength Binary Simple Periodic Structure

et al. 2019

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In this paper, a silicon-based terahertz wideband filter was designed using rigorous couple wave theory to achieve high diffraction efficiency and wideband filtering performance. The optimal parameters, such as filter period, duty ratio, and groove depth, are given. The design value and tolerance analysis were carried out to obtain the allowable deviation range of each structural parameter of the filter. The device was fabricated and tested for performance. The experimental results were consistent with the design results, proving the feasibility of the design method and can be applied in terahertz, communication, imaging, and other fields.

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Section: Introductionmentioning

confidence: 99%

Terahertz Wideband Filter Based on Sub-Wavelength Binary Simple Periodic Structure

et al. 2019

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“…Our group has successfully applied the neural network algorithm to solve the problem of the microstructure distribution on the lower surface of the light guide plate [16], and posses many years of research experience in optical correlation recognition and micro optical design [17]- [23]. Based on the previous research, a novel method of neural network applied in optical correlation recognition is presented to enhance the poor performance in 4F optical correlator.…”

Section: Introductionmentioning

confidence: 99%

A Novel Method to Realize Optical Correlation Recognition Based on Neural Network

Yang

Liang

et al. 2018

IEEE Photonics J.

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A neural network model is constructed according to 4F optical correlator. New optical filter is obtained by training the neural network. For recognition of distortion targets, the correlation peaks from correlator applying new filter are averagely increased up to 306.7% than applying the OTSDF filter, and correlation peaks are higher, sharper and easier to be distinguished, which indicates optical correlator with new filter have better performance in distortion invariant recognition.

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“…Light sources arranged on the edges of light guides are directed and distributed to a uniform planar light by curvature designs [3] or microstructures arranged at one or both sides of the light guide [4][5][6][7]. End-lit lightguide bars (LGBs) in automotive lighting share a similar technology but deal with much more complex geometry, such as rings [8], stripes [9], tubes [10], sheets [11], and panels with three-dimensional curvature.…”

Section: Introductionmentioning

confidence: 99%

Optical design and optimization of planar curved LED end-lit light bar

Chen

Kao

2014

Appl. Opt.

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This study investigates the optical design of planar curved LED end-lit light bars using v cuts as light-diverting structures. The application of LEDs in automotive lighting has become popular, especially in signal lamps and daytime running lamps. Most designs adopt a direct back light using arrays of LEDs with diffusive coupling optics, which often causes problems such as low uniformity, glaring, and excessive LEDs. Edge-lit LED light guides in automotive applications share a similar principle with the light-guide plates in back-light models of LCD but with much more complicated geometry. However, related literature on the optical design of nonrectangular light-guide plates is very limited. This study addresses the design of planar curved LED end-lit light bars and the optimization scheme for illuminance uniformity. V cuts are used as the optical coupling features, and the lead angles of the v cuts are varied to achieve optimum axial luminous intensity. This study presents a solution to reduce the illuminance difference between the inner and the outer portions of curved light bars by introducing gradual taper v cuts across the curved section. A line graph with preselected anchor points is proposed to define the size distribution of evenly spaced v cuts along the light bar. A fuzzy optimization scheme is then applied to iterate the anchor size to achieve illuminance uniformity. The designs of a planar curve light bar with a rectangular cross section and a light-guide ring with a circular cross section are presented to illustrate the design scheme.

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Algorithm research on microstructure distribution on the bottom surface of an integrated micro-optical light guide plate

Cited by 21 publications

References 9 publications

Terahertz Wideband Filter Based on Sub-Wavelength Binary Simple Periodic Structure

Terahertz Wideband Filter Based on Sub-Wavelength Binary Simple Periodic Structure

A Novel Method to Realize Optical Correlation Recognition Based on Neural Network

Optical design and optimization of planar curved LED end-lit light bar

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