Aberration correction of a single aspheric lens with particle swarm algorithm

Qin, Hua

doi:10.1016/j.optcom.2012.02.083

Cited by 27 publications

(14 citation statements)

References 8 publications

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“…Here, i denotes the ith light ray. i R i serves as the fitness function of PSO, aspheric parameters C, a 2 , a 4 , a 6 , a 8 can be obtained by seeking the particle with the smallest i R i using the PSO method [41].…”

Section: Analyses For Collecting Solar Light With a Single Reflectormentioning

confidence: 99%

“…Energies 2019, 12, x FOR PEER REVIEW 3 of 16 (PSO) method. PSO algorithm was successfully implemented for designing the laser beam shaping lenses and LED collimator systems [39][40][41] in our recent works. Figure 1 depicts a new idea about a concentrator system.…”

Section: Introductionmentioning

confidence: 99%

“…Based on our previous work [14], we designed an off-axis point focused solar concentrator system consisting of 190 aspheric reflectors by employing particle swarm optimization Energies 2019, 12, 4038 3 of 14 (PSO) method. PSO algorithm was successfully implemented for designing the laser beam shaping lenses and LED collimator systems [39][40][41] in our recent works.…”

mentioning

confidence: 99%

“…In this design example, the number of parameter variables the shape of a reflector is the dimension of eachparticle's position vector, the searching range of each variable is based on a sensitivity analysis of effects of function parameters, and respectively set as C[−1/1500, 0], a2[0, 200], a4[−5 × 10 −8 , 5 × 10 −8 ], a6[−10 −11 , 10 −11 ], a8[−10 −13 , 10 −13 ]. The smallest  i i R is searched for by the standard PSO tool written in matlab, and then a definite set of aspheric parameters with the smallestR will be attained[41].…”

mentioning

confidence: 99%

“…is searched for by the standard PSO tool written in matlab, and then a definite set of aspheric parameters with the smallest i R i will be attained[41]. Here we once again emphasize that readers should have basic knowledge about PSO.…”

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confidence: 99%

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Solar Concentrator Consisting of Multiple Aspheric Reflectors

Cao¹,

Qin

Rajan

et al. 2019

Energies

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This paper presents an off-axis-focused solar concentrator system consisting of 190 aspheric reflectors, where the aperture radius of each reflector is 10 cm, and vertices of all reflectors are orderly arranged in the same plane. The aspheric parameters controlling the curvature of the reflectors are determined using coordinate transformations and the particle swarm optimization (PSO) algorithm. Based on these aspheric parameters, the light distribution of focal plane was calculated by the ray tracing method. The analyses show that the designed concentrator system has a spot radius of less than 1 cm and the concentration ratio over 3300:1 is achieved using only one reflection. The design results have been verified with the optical design software Zemax.Most of the important developments of solar concentrators have been done in the solar thermal and PV systems. In the solar thermal system, the most common method is to increase focusing stages and reflectors. Rodriguez-Sanchez et al. (2015) employed secondary devices to optimize the focusing position and the incidence angle of sunlight [17]. Balaji et al. (2016) employed the combination of multi-stage focusing and multiple reflectors to increase the concentration ratio and also to improve the flux distribution over the circumference of the absorber [18]. Benyakhlef et al. (2016) used multiple rotating curved heliostats instead of flat ones to reflect the sun-rays onto the linear receiver at a fixed position. Primary focusing heliostats were arranged in rows whereas the secondary reflector was only one reflector. Interestingly, the curvature allowed the heliostats to be more precise than in flat ones and offered a higher concentration capacity [19]. Sharma et al. (2015) utilized the line Fresnel reflector (LFR) field consisting of parallel rows of collectors in which each collector-row was composed of parallel rows of reflectors that direct the sun-rays toward linear receivers [20]. Qin et al. (2013) raised the concentration ratio of a trough concentrator to 285:1 in case of off-axis focus by adopting reflective aspheric surfaces [14]. Recently, a prototype of two-stage non-imaging solar concentrator showed a higher concentration ratio at the receiver plane [21]. However, improving the spatial uniformity can efficiently increase the concentration ratio. A new concept of high-flux non-coaxial concentrating solar simulator was introduced to the typical ellipsoidal reflectors [22]. In some cases, multiple reflectors were used to focus the solar beam on the same small area in order to increase the temperature of the focus area [23][24][25][26]. Loni et al. (2016) used parabolic dish concentrators to focus the sun-rays on the receiver for obtaining a high temperature of work fluid. Furthermore, they designed a cylindrical closed-tube open-cavity solar receiver in such a way to absorb the solar energy to the maximum extent [27]. Other methods have also been applied to achieve high concentration ratio. Liang et al. (2015) investigated solar concentrator based on the off-ax...

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Section: Analyses For Collecting Solar Light With a Single Reflectormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Solar Concentrator Consisting of Multiple Aspheric Reflectors

Cao¹,

Qin

Rajan

et al. 2019

Energies

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Automated Design of Multi-element Optical Systems for Various Purposes

Sokurenko

2023

Studies in Systems, Decision and Control

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Novel method to design laser beam shaping lenses using PSO techniques

Qin

Pang

2018

Appl. Phys. B

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To design beam shaping lenses converting the light from Gaussian intensity distribution into flat-top profile, a new methodparticle swarm optimization (PSO) algorithm-was employed. The theoretical values of ray intersections at the output plane are precisely calculated by the energy conservation when a Gaussian beam is converted to a flat-top one, and these values are then used as target values in the optimization process. Real values of ray intersections are obtained from the ray tracing. The absolute values of the differences between real and theoretical values are used to construct the merit function of a shaping lens system, which are also used as the fitness function values for the PSO. By the manipulation of minimizing the fitness function, refractive two-element beam shapers and a refractive single-element beam shaper have been designed. The analyses for the design results demonstrated the feasibility and validity of the PSO method in the design of laser beam shaping lenses.

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Aberration correction of a single aspheric lens with particle swarm algorithm

Cited by 27 publications

References 8 publications

Solar Concentrator Consisting of Multiple Aspheric Reflectors

Solar Concentrator Consisting of Multiple Aspheric Reflectors

Automated Design of Multi-element Optical Systems for Various Purposes

Novel method to design laser beam shaping lenses using PSO techniques

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