Compound Parabolic Concentrator-Simultaneors Multiple Surfaces Design Methods for LED Collimators

Hang, 张航 Zhang; Xue, 梁雪 Liang; Jinhua, 严金华 Yan; Xu, Zhousu; Jun, 徐军 Xu; Gang, 陈钢 Chen

doi:10.3788/aos201232.0922004

Cited by 4 publications

(1 citation statement)

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“…Revolution paraboloids have been widely used in large radio telescopes [1], radar antennas [2], and optics devices [3,4] because of their fine focusing and reflection properties. Owing to machining and deformation errors during manufacturing, the actual paraboloids are not always entirely consistent with their designs [5,6], and their performances are directly affected by these errors [7,8]. To determine precisely the actual surface error of a paraboloid, a best-paraboloid fitting is required for the deformed paraboloid.…”

Section: Introductionmentioning

confidence: 99%

Fitting and error evaluation for rotating paraboloid in arbitrary position using geometric iterative optimization algorithm

Tu¹,

Lei²,

Ma³

et al. 2019

Meas. Sci. Technol.

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To realize a more accurate fitting and error evaluation for a rotating paraboloid in an arbitrary position, a new fitting and error evaluation method based on the geometrical characteristics of the paraboloid is presented for rotating paraboloid in arbitrary positions. The proposed method is named the 'geometric iterative optimisation algorithm'. First, the initial reference vertex, focus and initial profile error of the measured rotating paraboloid are obtained based on coordinate transformations and the least-squares method, and a reference paraboloid is established by using the reference vertex and focus. Second, two regular hexahedrons are collocated by taking the reference vertex and focus as datum points, and the initial profile error as the side length. Eight auxiliary vertexes and focuses (that is, the vertexes of two regular hexahedrons) are obtained. Using the auxiliary vertexes and focuses, a series of auxiliary paraboloids defined by the auxiliary vertexes and focuses are established. Third, reference profile error and auxiliary profile errors of the measured rotating paraboloid are calculated by considering the reference paraboloid and the auxiliary paraboloids as ideal paraboloids. Fourth, the reference points are changed or the side lengths of the hexahedron are decreased by comparing the the reference profile error and the auxiliary profile errors. The minimum zone fitting and evaluation for the paraboloid profile are realized by repeating the above process. The principle and steps involved when using the proposed method to solve the rotating paraboloid profile error are described in detail, and mathematical formulas are presented. The simulation results show that this method can obtain not only accurate results but it is also stable.

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Section: Introductionmentioning

confidence: 99%

Fitting and error evaluation for rotating paraboloid in arbitrary position using geometric iterative optimization algorithm

Tu¹,

Lei²,

Ma³

et al. 2019

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

Design and analysis of unequal aperture off-axis optical integrator for solar simulators

Chen,

Sun,

Liu

et al. 2024

Opt. Express

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The unequal aperture off-axis optical integrator design method is proposed to improve the irradiation uniformity of solar simulators and solve the problem of limited uniformity of optical integrator due to aberrations and uneven distribution of incident radiation. Firstly, the unequal aperture off-axis optical integrator structure is designed based on the scalar diffraction theory to analyze the factors affecting the optical homogenization ability of the optical integrator. Then, the relationship between sub-eye lens aperture and arrangement is explored in combination with Lagrange invariance principle and semi-definite programming theory. Finally, the optimum off-axis amount of sub-eye lens with different ring band is determined from the perspective of geometric optics by using the aberration theory and following the principle of edge light, so as to improve the evenness of optical integrator. The design results are verified by the simulation analysis. The simulation results show that: In the picture plane of optical integrator, the irradiation non-uniformity in the ф 26 mm irradiation plane is 14.87%, which is better than 26.02% in the traditional optical integrator. At the same time, at the effective irradiated surface, the irradiation non-uniformity of 0.53% within the ф 300 mm reaches the irradiation standard of the class A + solar simulator, and the irradiance only decreases by 16.5% compared with the traditional optical integrator, which still meets the index requirement of a solar constant. The goal of improving the evenness of optical integrator is realized without greatly affecting irradiance and without introducing aspherical design.

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用于太阳模拟器光束调制的复合抛物面反射器设计

Chen Jiali,

Sun Gaofei,

Liu Shi

et al. 2023

中国激光

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Compound Parabolic Concentrator-Simultaneors Multiple Surfaces Design Methods for LED Collimators

Cited by 4 publications

References 0 publications

Fitting and error evaluation for rotating paraboloid in arbitrary position using geometric iterative optimization algorithm

Fitting and error evaluation for rotating paraboloid in arbitrary position using geometric iterative optimization algorithm

Design and analysis of unequal aperture off-axis optical integrator for solar simulators

用于太阳模拟器光束调制的复合抛物面反射器设计

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