Manufacture and analysis of a refractive surface with variable asphericity to model the human cornea

Cruz-Félix, Ángel S.; Alvarado, Agustín Santiago; Iturbide-Jiménez, F.; Reyes-Pérez, Emilio R; Löpez-Olazagasti, E.; Tepichín-Rodríguez, Eduardo

doi:10.1117/12.2188946

Cited by 2 publications

(1 citation statement)

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“…Which consists of generating a mold with the shape of the lens surfaces and introducing the polymeric material for curing. The biggest challenge of this technique is the elaboration of the mold, where various methods have been used, such as thermal reflow photolithography, laser micro-machining, micro-turning, electric discharge micromachining, and ultra-precision diamond machining [10,[11][12][13][14][15][16][17]. This paper proposes designing, manufacturing, and testing a 6061-aluminum mold using a numerical control milling machine.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of aluminum molds using the null screens test

Santiago-Alvarado,

Granados-Agustín,

Percino-Zacarías

et al. 2023

Modeling Aspects in Optical Metrology IX

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Elastic lenses have been used in various optical systems, such as cameras, microscopes and vision systems, to name a few. A recently reported technique consists of making the lens's optical design, subsequently manufacturing an aluminum mold with the optical parameters of the design obtained, and finally injecting the polymer mixture into it to generate the lens. Where the lens surfaces take the shape of the mold surfaces, it is necessary to verify the finish of the mold surfaces so that the manufactured lenses meet the design requirements. In this work, the null screen technique is presented to evaluate the finish of these surfaces. An analysis of the results obtained and their conclusions is offered.

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Section: Introductionmentioning

confidence: 99%

Evaluation of aluminum molds using the null screens test

Santiago-Alvarado,

Granados-Agustín,

Percino-Zacarías

et al. 2023

Modeling Aspects in Optical Metrology IX

View full text Add to dashboard Cite

show abstract

Development of a bio-inspired optical system that mimics accommodation and lighting regulation like the human eye

Santiago-Alvarado,

Granados-Agustín,

López-Raymundo

et al. 2023

Appl. Opt.

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Bio-inspired optical systems have recently been developed using polarizers and liquid or rigid lenses. In this work, we propose a bio-inspired opto-mechatronic system that imitates the accommodation and regulation of light intensity as the human eye does. The system uses a polymeric lens as a cornea, an adjustable diaphragm as an iris, a tunable solid elastic lens as a crystalline lens, and a commercial sensor as a retina. We also present the development of the electronic control system to accommodate and regulate the amount of light that enters the system, for which two stepper motors, an Arduino control system, and light and movement sensors are used. The characterization of the system is presented together with the results obtained, where it can be seen that the system works in an acceptable range as the human eye does.

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Manufacture and analysis of a refractive surface with variable asphericity to model the human cornea

Cited by 2 publications

References 0 publications

Evaluation of aluminum molds using the null screens test

Evaluation of aluminum molds using the null screens test

Development of a bio-inspired optical system that mimics accommodation and lighting regulation like the human eye

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