In this study, we demonstrate the effect of GaN-based blue light-emitting diodes (LEDs), using an InGaN layer inserted between n-type GaN cladding and active (InGaN/GaN multiple quantum well), on improving device performances. With a 20-mA current injection, results indicate that typical output power (or forward voltage) grown with, without, insertion are approximately 18.1 (3.1) 15.3(3.5) mW (V), respectively. This corresponds to enhancement in (wall-plug efficiency) around 18% (33%), with...

A new concept for the optimization and optical design of miniature digital zoom optics with liquid lens elements is proposed in this research. The are limited to discrete configuration order obtain optimal performance zoom. We propose a newly developed layout modified genetic algorism (GA) method, meet demands certain specification. results show that we achieve successful optics, whose greatly improved up 48.68%, from standpoint on-axis spot size.

Refractive index measurements have been an important task for a long time because that plays essential role in describing the optical properties of material. Many methods developed to perform task. Some them use interferometry achieve high precision. However, these configurations are complicated. measure critical angle using simple structures, but their accuracy is unsatisfactory it difficult judge exact with intensity variations. Here, we propose several new schemes based on measuring...

Two different types of Gauss lens design, which effectively eliminate primary chromatic aberration, are presented using an efficient genetic algorithm (GA). The current GA has to deal with too many targets in optical global optimization so that the performance is not much improved. Generally speaking, achromatic aberrations have a great relationship variable glass sets for all elements. For optics whose design roughly convergent, will play significant role axial and lateral color aberration....

This paper demonstrates an optical design of miniature LCOS engine and optics with white light-emitting diode (LED) the most importantly, proposes a new optimization method for non-image via Genetic Algorithm (GA) written in Optical Software ASAP, order to achieve best performance light efficiency uniformity. Thanks development modern digital equipment, work plays role engineering. So far Least Damping Square, Taguchi Fuzzy, simulation annealing methods have been introduced some them has...

A fiber-Bragg-grating (FBG)-based optical code-division multiple-access (OCDMA) network coder/decoder (codec) is investigated for its interference suppression induced by nonflattened broad-band lightwave sources. Since each user with different signature address code has spectral distribution, the light sources will cause (MAI). Flatness compensation schemes are proposed to solve MAI effects By arranging same coding scheme but in band, chips from FBG coder/compensator incoherently power...

A transparent reconfigurable optical add–drop multiplexer (ROADM) based on arrayed-waveguide gratings (AWGs) and tunable fiber Bragg (FBGs) is presented in this paper. The wavelength of the FBG could be tuned within free spectral range AWG to implement function without interfering other channels. An experiment was demonstrated verify evaluate performance proposed ROADM. Proposed novel ROADM flexible scalable for dense division multiplexing network.

This study proposes a newly developed optimization method for an aspherical lens system employed in refractive laser beam shaping system, which performs transformations on spots such that they are transformed into flat-tops of any size. In this paper, genetic algorithm (GA) with multipoint search is proposed as the method, together macro language optical simulation software, order to ideal and optimized parameters. comparison traditional two-dimensional (2D) computational using...

A freeform lens construction is proposed to form a specific rotation symmetric beam profile with collimation in this paper. In the approach, two surfaces are constructed segment-by-segment using numerical method based on Snell's law produce an output which has both good irradiance uniformity and high collimation. It shown that as number of segments used construct increases, approaches profile. sparse design point surface additionally allows approach desirable distribution fewer segments. The...

This paper proposes a capsule endoscope (CE) with flexible large field of view (FOV) that imitates the compound eyes insects, like those fly. Thirty-one ball lenses are demonstrated to cover 175° viewing area for constructing lens. The lens used in CE is responsible 40° form image on curve plane. A fiber array applied fit plane improve curvature aberration and deliver into an sensor. Such can share aberrations multiple lenses, keep high relative illumination (RI), make adjustment FOV...

Abstract A general procedure for design and analysis of a Rotman‐type beam‐forming lens using 2‐dimensional field is proposed. Evaluation reflection coefficients, coupling between ports, main beam direction, 3‐dB width side lobe level are described. The results sample case in agreement with the experimental results. developed suitable CAD implementation leading to optimization Rotman layout configuration.

This letter proposes a wavelength/spatial optical code-division multiple-access system based on quadratic congruence code matrices (QCCM). According to the in-phase cross-correlation of QCCM, interference can be fully eliminated by using balanced photodetectors (PDs). Moreover, this proposal provides greater signal power than does modified (MQC) coding system. Compared with maximal-area (M-matrices) and MQC system, simulated results indicate that remarkably improve performance in receiver PDs.

This paper proposes a capsule endoscope (CE), based on color multiplexing, to simultaneously record front and side images. Only one lens associated with an X-cube prism is employed catch the view profiles in CE. Three filters polarizers are placed three sides of prism. When objects locate at X-cube's sides, different colors will be caught through proposed recorded image sensor. The multiplexing CE (CMCE) designed field up 210 deg 180 lp/mm resolution under f-number 2.8 overall length 13.323...

A streetlight with a split light source is presented to construct freeform mirror for converting certain distribution into uniform illumination. It easy maintain the proposed because sources are placed at bottom of lamppost. Two collimated mirrors employed allow rays travel long distance without much loss power. There 400 × pieces area divided reference plane (RP), (FM) and an illumination (IA). According distribution, method evaluate equal luminance each RP-divided area. Such expected...

An incoherence Gaussian beam with divergence is converted to uniformity and collimation simultaneously at a desirable spot size requirement by using one Fresnel surface. The design process simplified one-dimension (1-D) respect the having revolution symmetry. Such 1-D profile divided into several parts from center outside. power corresponds height difference, i.e., provide uniformity, corresponding difference ratio constant. ray passing through boundary of each part regarded as incident that...

This paper propose an optical design of adaptive automotive headlight system with advanced light-emitting diodes (LEDs) and digital micro-mirror device (DMD). In recent days, safety on-road drive plays the role at industries so that fast response becomes a critical issue especially in mountain road drive. order to integrate function low high beam into single without sacrifice volumetric size whole system, DMD is employed this design. Simulation shows new not only promotes light efficiency...