Tunable GRIN PDMS-made lenses with aspheric profile

A polymer that has been used for the development of optical components and has had a significant impact is polydimethylsiloxane (PDMS) due to its remarkable mechanical and optical properties and easy handling. We present a practical and straightforward technique for designing and manufacturing a tunable graded index, graphical input (GRIN)-type lenses, and tunable lenses with a homogeneous refractive index made of PDMS. Implementing a biconical surface profile in a tunable plane-convex lens is proposed for elaborating both a homogeneous refractive index lens and a multilayered GRIN-type lens with a constant increased variation of 0.014 on its refractive index. Likewise, we introduce a mechanical mounting system that aims to modify their curvatures and therefore their focal lengths through mechanical stimuli applied on the lenses. Simulations of the optomechanical behavior and optical characterization of the lenses are also presented.

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Tunable multilayered lens made of PDMS with a biconical surface profile design and manufacture

Alvarado

Cruz-Félix

Reyes-Pérez

et al. 2022

Appl. Opt.

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Parametric multiphysics study of focus-variable silicone lenses

Ziebehl,

Grabe,

Biermann

et al. 2023

Appl. Opt.

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By exploiting their inherent elasticity, focus-variable silicone lenses shift their focal length reversibly when deformed. Although biconcave and meniscus lenses contribute to optical systems just as well as biconvex lenses, studies primarily revolve around the latter. Thus, we aim to reveal the focal length shifting potential of all aforementioned lens types. Covering a wide parameter range of varying lens curvature radii, we present a coupled mechanical and optical simulation in which a lens deformation is applied. The results show significant differences in focal length shifting effectiveness for different lens types. Within the domains of specific lens types, trends in this effectiveness emerge for different combinations of curvature radii. Matching these radii when incorporating adaptive silicone lenses in optical systems may guide optics engineers toward more effective system designs through this study.

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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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Tunable GRIN PDMS-made lenses with aspheric profile

Cited by 3 publications

References 17 publications

Tunable multilayered lens made of PDMS with a biconical surface profile design and manufacture

Tunable multilayered lens made of PDMS with a biconical surface profile design and manufacture

Parametric multiphysics study of focus-variable silicone lenses

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

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