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Journal articles on the topic 'Optimization of lens'

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Published: 4 June 2021
Last updated: 13 February 2022

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1

Chien, Ming-Chin, and Chung-Hao Tien. "Cluster LEDs mixing optimization by lens design techniques." Optics Express 19, S4 (June 9, 2011): A804. http://dx.doi.org/10.1364/oe.19.00a804.

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2

FORBES, GREG, and ANDREW JONES. "GLOBAL OPTIMIZATION IN LENS DESIGN." Optics and Photonics News 3, no. 3 (March 1, 1992): 22. http://dx.doi.org/10.1364/opn.3.3.000022.

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3

Yen, Jyh Chyang, Jin Jia Chen, and Kuang Lung Huang. "Optimization and Analysis of Alvarez Lens." Advanced Materials Research 1079-1080 (December 2014): 889–94. http://dx.doi.org/10.4028/www.scientific.net/amr.1079-1080.889.

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Alvarez lens is one of the free form lens designs. After optimized, the focusing distance curve of Alvarez lens keeps smoothly when Δd increased. We also found the effects of the affective factors, and the good performances of geometric image and illumination surface analysis.
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4

Tran Quang Dat, Gang-Won Jang, Hyu Sang Kwon, Seung Hyun Cho, Yo-Han Cho, and Hee-Seon Seo. "CO-KR-3 Shape optimization of acoustic lens beamformers." Proceedings of Mechanical Engineering Congress, Japan 2012 (2012): _CO—KR—3–1—_CO—KR—3–6. http://dx.doi.org/10.1299/jsmemecj.2012._co-kr-3-1.

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5

Hesam Mahmoudi Nezhad, N., M. Ghaffarian Niasar, A. Mohammadi Gheidari, C. W. Hagen, and P. Kruit. "Multi-electrode lens optimization using genetic algorithms." International Journal of Modern Physics A 34, no. 36 (December 11, 2019): 1942020. http://dx.doi.org/10.1142/s0217751x1942020x.

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In electrostatic charged particle lens design, optimization of a multi-electrode lens with many free optimization parameters is still quite a challenge. A fully automated optimization routine is not yet available, mainly because the lens potential calculations are often done with very time-consuming methods that require meshing of the lens space. A new method is proposed that improves on the low speed of the potential calculation while keeping the high accuracy of the mesh-based calculation methods. This is done by first using a fast potential calculation based on the so-called Second-Order Electrode Method (SOEM), at the cost of losing some accuracy, and then using a Genetic Algorithm (GA) for the optimization. Then, by using the parameters of the approximate systems found from this optimization based on SOEM, an accurate GA optimization routine is performed based on potential calculation with the commercial finite element package COMSOL. A six-electrode electrostatic lens was optimized accurately within a few hours, using all lens dimensions and electrode voltages as free parameters and the focus position and maximum allowable electric fields between electrodes as constraints.
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6

Yan Qiang, 严强, 高椿明 Gao Chunming, 生艳梅 Sheng Yanmei, 陈霄 Chen Xiao, and 杨俊 Yang Jun. "Optimization Design of LED Collimating Lens." Laser & Optoelectronics Progress 50, no. 11 (2013): 112203. http://dx.doi.org/10.3788/lop50.112203.

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7

Liu, Ming Qiang, and Mladen Franko. "Thermal Lens Microscopy: Characterization and Optimization." Applied Mechanics and Materials 624 (August 2014): 317–21. http://dx.doi.org/10.4028/www.scientific.net/amm.624.317.

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Thermal lens microscopy (TLM) is a highly sensitive photothermal technique, and has found various applications in chemical analysis, especially when it is combined with lab-on-a-chip chemistry. In this paper, we analyze a couple of key characteristics of TLM, and give suggestions for optimization of the system for higher detection sensitivity, lower noise, lower irradiation density and/or better temporal and spatial resolutions. This will advance the development of TLM instrument for different chemical and biochemical analyses.
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8

Chang, Jintao, Honghui He, Chao He, Yong Wang, Nan Zeng, Ran Liao, and Hui Ma. "Optimization of GRIN lens Stokes polarimeter." Applied Optics 54, no. 24 (August 19, 2015): 7424. http://dx.doi.org/10.1364/ao.54.007424.

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9

Edgcombe, C. J., A. R. Lupini, and J. H. Taylor. "Robust optimization for magnetic lens design." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 427, no. 1-2 (May 1999): 306–9. http://dx.doi.org/10.1016/s0168-9002(98)01537-x.

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10

Beach, Raymond J. "Theory and optimization of lens ducts." Applied Optics 35, no. 12 (April 20, 1996): 2005. http://dx.doi.org/10.1364/ao.35.002005.

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11

Tang, Ziyao, Matthias Sonntag, and Herbert Gross. "Ant colony optimization in lens design." Applied Optics 58, no. 23 (August 7, 2019): 6357. http://dx.doi.org/10.1364/ao.58.006357.

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12

Gannon, Caleb, and Rongguang Liang. "Evolving expertise for automated lens optimization." Applied Optics 59, no. 22 (June 23, 2020): G129. http://dx.doi.org/10.1364/ao.391888.

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13

Wang, Li, and Douglas D. Koch. "Custom optimization of intraocular lens asphericity." Journal of Cataract & Refractive Surgery 33, no. 10 (October 2007): 1713–20. http://dx.doi.org/10.1016/j.jcrs.2007.07.010.

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14

Shang, Hongbo, Luwei Zhang, Chunlai Liu, Ping Wang, Yongxin Sui, and Huaijiang Yang. "Optimization based on sensitivity for material birefringence in projection lens." Chinese Optics Letters 18, no. 6 (2020): 062201. http://dx.doi.org/10.3788/col202018.062201.

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15

Ershadi, S. E., A. Keshtkar, A. Bayat, A. H. Abdelrahman, and H. Xin. "Rotman lens design and optimization for 5G applications." International Journal of Microwave and Wireless Technologies 10, no. 9 (June 26, 2018): 1048–57. http://dx.doi.org/10.1017/s1759078718000934.

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AbstractThe next generation of wireless networks (5G) employs directional transmission at millimeter wave (mmW) frequencies to provide higher bandwidth and faster data rates. This is achieved by applying antenna arrays with proper beam steering capabilities. Rotman lens has long been used as a lens-based beamformer in electronically scanned arrays and its efficient design is important in the overall performance of the array. Minimizing the phase error on the aperture of the antenna array is an important design criterion in the lens. In this paper, a 7 × 8 wideband Rotman lens is designed. Particle swarm optimization is applied to minimize the path length error and thereby the phase error. The optimized lens operates from 25 to 31 GHz, which covers the frequency bands proposed by the Federal Communications Commission for 5G communications. The proposed optimized lens shows a maximum phase error of <0.1°. The proposed Rotman lens is a good candidate to be integrated with wideband microstrip patch antenna arrays that are suitable for 5G mmW applications.
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16

Sartoros, Christine, Douglas M. Goltz, and Eric D. Salin. "Program Considerations for Simplex Optimization of Ion Lenses in ICP-MS." Applied Spectroscopy 52, no. 5 (May 1998): 643–48. http://dx.doi.org/10.1366/0003702981944292.

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The performance of an inductively coupled plasma mass spectrometer (ICP-MS) is dependent on the ion optic bias potentials. A discussion of the multielement optimization of the ICP-MS ion optics bias potentials using a Simplex algorithm is presented. Three objective functions were tested: a function developed by Leary; the combined ratio method (CRM); and the Euclidean distance from multicriteria target vector optimization. Both the Leary and the target vector optimization's performances were comparable, whereas the CRM optimizations placed an emphasis on obtaining similar signal intensities. Experiments determined that an initial Simplex starting size of 20% of the parameter space was optimal. A method for the selection of an appropriate target vector by predicting analyte signal intensity was also investigated. Signal intensities for all elements could be predicted with an acceptable margin of error (10–30%), provided that the same conditions were used. Comparisons of optimizations using a single mid-mass element vs. multielement optimizations revealed that the multielement approach is only slightly better. If the analyst wished to optimize lens settings to favor heavy or light elements, then an average mass was better than a mid-mass optimization.
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17

Tsai, Cheng-Mu. "Optimization of Zoom Lens with Discrete State of Liquid Lens Elements by Using Genetic Algorithm." Advances in Materials Science and Engineering 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/209064.

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This paper is to employ liquid lens elements to design a lens with zoom function by using the genetic algorithm (GA) optimization. The liquid lens elements used in the proposal can apply voltage adjustment to generate the electrical field that induces the liquid with electric conductivity to vary the surface curvature between two different kinds of liquids. According to the voltage level, the liquid lens element makes the discrete variation of the curvature and thickness realize the zoom function without moving the lens groups so that the overall length can be reduced. However, it is difficult to design the zoom lens under the discrete variation of the curvature and thickness in the liquid lens elements and the mechanical space that is constantly limited. The GA offers a flexible way for lens optimization. We regarded the spot size as the fitness function to look for the optimum curvatures, thickness, and the corresponding statuses of liquid lens elements for the zoom lens. As a result, the zoom lens with constant space can be realized by running the selection, crossover, and mutation operation in the GA optimization.
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18

SHINANO, Yuji, Youzou FUKAGAWA, Yoshimi TAKANO, and Toshiyuki YOSHIHARA. "Lens System Adjustment in Semiconductor Lithography Equipment (Optimization for Lens Groups Rotation)." Transactions of the Japan Society of Mechanical Engineers Series C 73, no. 735 (2007): 2982–87. http://dx.doi.org/10.1299/kikaic.73.2982.

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19

Fang, Yi-Chin, and Chen-Mu Tsai. "Miniature lens design and optimization with liquid lens element via genetic algorithm." Journal of Optics A: Pure and Applied Optics 10, no. 7 (May 23, 2008): 075304. http://dx.doi.org/10.1088/1464-4258/10/7/075304.

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20

Wei, Lei, Tong Linsu, and Yang Hui. "Fuzzy optimization of an electron optical lens." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 363, no. 1-2 (September 1995): 367–70. http://dx.doi.org/10.1016/0168-9002(95)00327-4.

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21

Cheng, Dewen, Yongtian Wang, and Hong Hua. "Automatic image performance balancing in lens optimization." Optics Express 18, no. 11 (May 17, 2010): 11574. http://dx.doi.org/10.1364/oe.18.011574.

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22

GICQUEL, JJ, G. COHEN, N. CHATEAU, P. LEYNAUD, and D. DONATE. "Custom wavefront optimization of intraocular lens asphericity." Acta Ophthalmologica 86 (September 4, 2008): 0. http://dx.doi.org/10.1111/j.1755-3768.2008.5232.x.

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23

Chuang, Fu-Ming, S. G. Shiue, and Ming-Wen Chang. "Design of zoom lens by optimization technique." Optical Review 1, no. 2 (January 1994): 256–61. http://dx.doi.org/10.1007/bf03254879.

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24

Isshiki, Masaki, Hiroki Ono, Kouichi Hiraga, Jun Ishikawa, and Suezou Nakadate. "Lens Design: Global Optimization with Escape Function." Optical Review 2, no. 6 (November 1995): 463–70. http://dx.doi.org/10.1007/s10043-995-0463-6.

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25

Chen, Wen-Chin, Tung-Tsan Lai, Min-Wen Wang, and Hsiao-Wen Hung. "An optimization system for LED lens design." Expert Systems with Applications 38, no. 9 (September 2011): 11976–83. http://dx.doi.org/10.1016/j.eswa.2011.03.092.

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26

Pinchera, Daniele, Stefano Perna, and Marco Donald Migliore. "Multiobjective Optimization of a Rotman Lens through the QLWS Minimization." International Journal of Antennas and Propagation 2017 (2017): 1–6. http://dx.doi.org/10.1155/2017/3845851.

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We address the multiobjective optimization of a Rotman lens by means of a recently proposed method based on the minimization of a properly defined global cost function named Quantized Lexicographic Weighted Sum (QLWS). More specifically, we have considered three different objectives concurring during the optimal synthesis of the lens. First, the difference between actual and desired delay among the excitations of the array elements fed by the lens needs to be lower than a given threshold. Second, gain losses of the beams scanned by the array fed by the lens need to be lower than a given threshold. Third, lens insertion losses should be as low as possible. Exploitation of the QLWS based approach allowed us to obtain in a few minutes a Rotman lens fulfilling these three concurring objectives and to improve the starting result obtained by a commercial software.
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27

Cui, Xiao Yu, Kah Bin Lim, Wei Loon Kee, and Qi Yong Guo. "System Optimization for Prism Based Stereovision." Advanced Materials Research 650 (January 2013): 374–78. http://dx.doi.org/10.4028/www.scientific.net/amr.650.374.

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In this paper, we proposed a method for analyzing and optimizing the prism based single-lens stereovision system so that the pictures captured by this system are adequate for the application of stereovision. We first analyzed this system from the standpoint of system setup and parameters selection. Then we introduced a method to calculate the FOV of the prism based single-lens stereovision system. By adding some restricted condition, we redefined the area of FOV and gave a detailed connection between FOV and captured picture to obtain the appropriate image pair for stereovision.
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28

Zhu, Yong Jian, Jing Xin Na, Jian Feng Sun, and Shao Hui Yin. "Ultra-Wide Car Lens Optimization Based on Low-Tg Aspheric Glass." Advanced Materials Research 497 (April 2012): 230–34. http://dx.doi.org/10.4028/www.scientific.net/amr.497.230.

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Car camera lens is widely used for the safety system of all kinds of vehicles. The car lens should have very wide field angle, strong ability to endure vibration and thermo-mechanical instability as well as erosion. According to these requirements, a new car lens is designed based on the aspheric glass lenses. The whole structure of car lens contains six separated glass lenses including two aspheric lenses. To reduce the cost, the aspheric lenses are made from low-Tg glass which is adaptable for mass production by glass molding press. The total track of lens is less than 30mm. For the enhancement of night vision, the F-number is set to be 2.4. The full FOV (field of view) of 160 is wide enough to capture all the dangerous information around the car. The imaging resolution is designed to be 3 Mega pixels. The designed result proves that the new car lens features high imaging quality. Its MTF (modulation transfer function) value is not less than 0.15 at the Nyquist frequency as for the field angle of 160. At the half Nyquist frequency, the MTF values of the most field angles are not less than 0.5. Therefore, the new lens could be used in the front of car to monitoring the dangerous cases around the corner.
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29

Weimer, Wayne A., and Norman J. Dovichi. "Optimization of Photothermal Refraction for Flowing Liquid Samples." Applied Spectroscopy 39, no. 6 (November 1985): 1009–13. http://dx.doi.org/10.1366/0003702854249394.

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A model has been developed for photothermal refraction using flowing liquid samples. In photothermal refraction, a cylindrical thermal lens is formed within the sample because of the temperature rise produced by the absorbance of a pump laser beam. This cylindrical thermal lens is intersected at right angles with a second probe laser. For static samples, the maximum signal results when the pump and probe beams are coplanar. Defocusing of the probe beam by the cylindrical thermal lens is detected as a change in the far-field probe beam center intensity. Flow acts to distort the temperature distribution by transporting heat down stream. For flowing samples, the optimum signal is found when the probe beam is located about one pump beam spot size down stream from the pump beam axis.
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30

Xiao, ZHANG, and LYU Lijun. "Aspheric optimization design of fisheye lens optical system." Journal of Applied Optics 40, no. 5 (2019): 863–70. http://dx.doi.org/10.5768/jao201940.0505001.

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31

Chien, Ming-Chin, and Chung-Hao Tien. "54.3: Cluster LED Spectral Optimization as Lens Design." SID Symposium Digest of Technical Papers 42, no. 1 (June 2011): 797–800. http://dx.doi.org/10.1889/1.3621450.

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32

Qin, Hua. "Particle swarm optimization applied to automatic lens design." Optics Communications 284, no. 12 (June 2011): 2763–66. http://dx.doi.org/10.1016/j.optcom.2011.02.020.

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33

Hou, Zhe, Milena Nikolic, Pablo Benitez, and Florian Bociort. "SMS2D designs as starting points for lens optimization." Optics Express 26, no. 25 (November 27, 2018): 32463. http://dx.doi.org/10.1364/oe.26.032463.

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34

Bertsimas, Dimitris, Angela King, and Rahul Mazumder. "Best subset selection via a modern optimization lens." Annals of Statistics 44, no. 2 (April 2016): 813–52. http://dx.doi.org/10.1214/15-aos1388.

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35

Chen, Xiaogang, and Kimiaki Yamamoto. "An experiment in genetic optimization in lens design." Journal of Modern Optics 44, no. 9 (September 1997): 1693–702. http://dx.doi.org/10.1080/09500349708230769.

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36

Fuchs, Benjamin, Ruzica Golubovic, Anja K. Skrivervik, and Juan R. Mosig. "Spherical lens antenna designs with particle swarm optimization." Microwave and Optical Technology Letters 52, no. 7 (July 2010): 1655–59. http://dx.doi.org/10.1002/mop.25278.

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37

Song, Je Heon, Jin Hee Yu, Jun Ho Lee, Won Keun Jang, and Dong Gil Lee. "Linear Fresnel Lens Optimization for Middle Concentrated Photovoltaic." Korean Journal of Optics and Photonics 24, no. 5 (October 25, 2013): 213–16. http://dx.doi.org/10.3807/kjop.2013.24.5.213.

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38

Yoshida, Shiro, Yukio Kitajima, and Hidekazu Sawae. "813 Loading Optimization of Glass Lens Molding Process." Proceedings of The Computational Mechanics Conference 2010.23 (2010): 387–88. http://dx.doi.org/10.1299/jsmecmd.2010.23.387.

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39

Damberg, Gerwin, and Wolfgang Heidrich. "Efficient freeform lens optimization for computational caustic displays." Optics Express 23, no. 8 (April 13, 2015): 10224. http://dx.doi.org/10.1364/oe.23.010224.

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40

Cheng, Xuemin, Yongtian Wang, Qun Hao, and Jose Sasian. "Automatic element addition and deletion in lens optimization." Applied Optics 42, no. 7 (March 1, 2003): 1309. http://dx.doi.org/10.1364/ao.42.001309.

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41

Jouve, François, and Khalil Hanna. "Shape optimization of an accommodative intra-ocular lens." Comptes Rendus Mécanique 333, no. 3 (March 2005): 243–48. http://dx.doi.org/10.1016/j.crme.2004.10.009.

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42

de Magistris, M., D. H. H. Hoffmann, E. Boggasch, and A. Tauschwitz. "Shape optimization of a wall-stabilized plasma lens." Il Nuovo Cimento A 106, no. 11 (November 1993): 1643–48. http://dx.doi.org/10.1007/bf02821262.

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43

Tereshchenko, Alexander V., Irina G. Trifanenkova, Alexander M. Ivanov, Marina V. Okuneva, and Natalya A. Orlova. "Optimization of energy parameters during surgery of high-density cataract." Ophthalmology journal 13, no. 2 (August 24, 2020): 23–30. http://dx.doi.org/10.17816/ov34142.

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The goal is to develop a combined technique for preliminary YAG laser fragmentation and Femto laser exposure on a CATALYS device and to evaluate its role in reducing the time and energy parameters of a surgery of high-density cataract. Material and methods. The study included 118 patients (118 eyes) with age-related cataracts of the 3rd and 4th degrees of lens nucleus density. In the main group, before phacoemulsification (PE) with a Femto laser support and IOL implantation, preliminary YAG laser phacofragmentation of the lens nucleus was performed. In the first control group, PE was performed with Femto laser support and IOL implantation. In the second control group PE with IOL implantation. Results. A 35% decrease in the energy of the Femto laser action at a 3rd degree of lens nucleus density was achieved, and 40% at the 4th degree, in comparison with the PE with the Femto laser support without preliminary YAG laser phacofragmentation, a 38% decrease in the cumulative ultrasound energy at 3rd degree of the lens nucleus density, and 42% at 4th degree compared with isolated ultrasonic cataract phacoemulsification. Conclusion. The proposed modification of the technique of combined YAG laser and Femto laser exposure allows achieving during cataract surgery a complete fragmentation of the lens nucleus of a high degree of density, helps minimizing the risk of complications and reaching quick postoperative rehabilitation of patients.
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44

LI Yi-mang, 李一芒, 周子云 ZHOU Zi-yun, and 刘永明 LIU Yong-ming. "Topology-optimization of Lens Contact Support Structures: PV Value as An Optimization Objective." Chinese Journal of Luminescence 40, no. 10 (2019): 1303–10. http://dx.doi.org/10.3788/fgxb20194010.1303.

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45

Wadhwa, Sagar, Mazin Jouda, Yongbo Deng, Omar Nassar, Dario Mager, and Jan G. Korvink. "Topologically optimized magnetic lens for magnetic resonance applications." Magnetic Resonance 1, no. 2 (October 12, 2020): 225–36. http://dx.doi.org/10.5194/mr-1-225-2020.

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Abstract. Improvements to the signal-to-noise ratio of magnetic resonance detection lead to a strong reduction in measurement time, yet as a sole optimization goal for resonator design, it would be an oversimplification of the problem at hand. Multiple constraints, for example for field homogeneity and sample shape, suggest the use of numerical optimization to obtain resonator designs that deliver the intended improvement. Here we consider the 2D Lenz lens to be a sufficiently broadband flux transforming interposer between the sample and a radiofrequency (RF) circuit and to be a flexible and easily manufacturable device family with which to mediate different design requirements. We report on a method to apply topology optimization to determine the optimal layout of a Lenz lens and demonstrate realizations for both low- (45 MHz) and high-frequency (500 MHz) nuclear magnetic resonance.
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46

Neiswander, Brian W., Eric Matlis, and Thomas C. Corke. "Geometric Optimization of a Cylindrical Plasma Adaptive Optics Lens." AIAA Journal 51, no. 3 (March 2013): 657–64. http://dx.doi.org/10.2514/1.j052029.

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47

Meng Xiaochen, 孟晓辰, 郝群 Hao Qun, 朱秋东 Zhu Qiudong, and 胡摇 Hu Yao. "Optimization Design of Partially Compensating Lens Based on Zemax." Acta Optica Sinica 31, no. 6 (2011): 0622002. http://dx.doi.org/10.3788/aos201131.0622002.

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48

Lin, Chao Ming, and Chih Kun Wang. "Processing Optimization of Optical Lens in the Injection Molding." Advanced Materials Research 813 (September 2013): 161–64. http://dx.doi.org/10.4028/www.scientific.net/amr.813.161.

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The processing conditions during the manufacturing have critical effects on the optical performances of the molded lenses including the refractive index, isochromatic fringe order, and the fringed pattern. The objective of this work is to investigate numerically some effects of the molding conditions on the residual stresses of injection molded lenses, and then to optimal the processing parameters for reducing the residual stresses using the Taguchi method. The results show the optimal method is able to improve the residual stress and to produce a good fringed pattern.
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49

Wang, Li. "Design optimization for two lens focused ion beam columns." Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures 15, no. 4 (July 1997): 833. http://dx.doi.org/10.1116/1.589494.

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50

Thomas, Gilles P. L., Jean-Yves Chapelon, Jean-Christophe Bera, and Cyril Lafon. "Parametric Shape Optimization of Lens-Focused Piezoelectric Ultrasound Transducers." IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 65, no. 5 (May 2018): 844–50. http://dx.doi.org/10.1109/tuffc.2018.2817927.

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