Optical design of athermal, multispectral, radial gradient-index lenses

Boyd, Andrew M.

doi:10.1117/1.oe.57.8.085103

Cited by 13 publications

(5 citation statements)

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“…Recent work by Boyd at Qioptiq has shown noteworthy progress on this approach where a model for the first-order optical design of athermal, radial GRIN systems is utilized. 119,120 Specifically, the work has suggested that radial GRIN components can significantly reduce the optical power balance of athermal, achromatic systems, thereby reducing aberration associated with individual lens components and improving overall performance. The improved first-order modeling technique provides a new opportunity for the optimization of a broadband multispectral optical design.…”

Section: Optical Design Tools For Grinmentioning

confidence: 99%

Advances in infrared gradient refractive index (GRIN) materials: a review

et al. 2020

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Optical materials capable of advanced functionality in the infrared will enable optical designs that can offer lightweight or small footprint solutions in both planar and bulk optical systems. The University of Central Florida's Glass Processing and Characterization Laboratory, together with our collaborators, have been evaluating compositional design and processing protocols for both bulk and film strategies employing multicomponent chalcogenide glasses (ChGs). These materials can be processed with broad compositional flexibility that allows tailoring of their transmission window, physical and optical properties, which allows them to be engineered for compatibility with other homogeneous amorphous or crystalline optical components. We review progress in forming ChG-based gradient refractive index (GRIN) materials from diverse processing methodologies, including solution-derived ChG layers, poled ChGs with gradient compositional and surface reactivity behavior, nanocomposite bulk ChGs and glass ceramics, and metalens structures realized through multiphoton lithography. We discussed current design and metrology tools that lend critical information to material design efforts to realize next-generation IR GRIN media for bulk or film applications.

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Section: Optical Design Tools For Grinmentioning

confidence: 99%

Advances in infrared gradient refractive index (GRIN) materials: a review

et al. 2020

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“…Graded index (GRIN) lenses have been a staple of modern optics as their ability to focus light using small spatial profiles has proven useful for all optical disciplines. 1,2 Current manufacturing methods for polymeric GRIN lenses make use of UV light or laser lithography, in which, two UV lasers are interfered within a resin or gel, creating an interference pattern which initiates polymerization. These optics are then thermally treated to vitrify the polymer, locking the polymerization profile in place.…”

Section: Introductionmentioning

confidence: 99%

Polymeric graded-index lenses via digital light processing vat photopolymerization additive manufacturing

Engelhardt,

Tu,

Chimenti

et al. 2024

Emerging Digital Micromirror Device Based Systems and Applications XVI

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Traditional methods of manufacturing graded-index (GRIN) lenses, such as chemical vapor deposition, ion exchange processes, and neutron irradiation, are time consuming, labor intensive, and cannot yield custom refractive index profiles. Additive manufacturing (AM) methods provide a potential alternative route to produce polymeric GRIN lenses easier as well as reduce costs. To date, AM approaches for GRIN lens production include inkjet 3D printing and multiphoton direct laser writing, which suffer from difficulty in material formulation and extremely large print times for macro scale lenses. This work seeks to create GRIN lenses using digital light processing (DLP) vat photopolymerization (VPP) AM. The main challenge of DLP VPP AM is related to the uncontrolled light penetration that induces additional curing in previously printed layers, which makes the control of conversion difficult. We adapted a conversion prediction model that was previously developed to predict the conversion profiles in printed parts by DLP VPP based on accumulated light dosage. By studying the index of refraction as a function of polymerization for various resin formulations, in combination with the conversion prediction model, we were able to utilize the grayscale capability of DLP to generate GRIN profiles through partial polymerization. This model was used to generate the 3D printing parameters needed to maintain proper extent of cure throughout the entirety of the print. These prints were then characterized to determine both the accuracy of the print design and the optical performance of the lens.

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“…GRIN optics involve creating a spatial variation of the refractive index in the material. In its primary use, this index variation can correct some optical aberrations such as spherical aberration [4] and chromatic aberrations [5][6][7], or can encode optical power inside the lens (not simply at the surface) [8,9].…”

Section: Introductionmentioning

confidence: 99%

Femtosecond Laser Direct Writing of Gradient Index Fresnel Lens in GeS2-Based Chalcogenide Glass for Imaging Applications

et al. 2022

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Chalcogenide glasses have attracted growing interest for their potential to meet the demands of photonic applications in the Mid-Wavelength InfraRed (MWIR) and Long-Wavelength InfraRed (LWIR) transmission windows. In this work, we investigated the photosensitivity to femtosecond laser irradiation of a dedicated chalcogenide glass, along with its possible applications in micro-optics. In order to address the SWaP problem (Size, Weight and Power), this work took advantage of recent techniques in femtosecond laser direct writing to imprint flat and integrated optical systems. Here, we wanted to simplify an infrared multispectral imaging system which combines a lens array and a filter array. Each channel has a focal length of 7 mm and an f-number of 4. We show in this paper that the chosen GeS2-based chalcogenide glass is very promising for the fabrication of graded index optics by fs-laser writing, and particularly for the fabrication of Fresnel lenses. We note a very important phase variation capacity in this infrared material corresponding to refractive index variations up to +0.055. A prototype of Fresnel GRIN lens with a refractive index gradient was fabricated and optically characterized in the Vis range.

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Optical design of athermal, multispectral, radial gradient-index lenses

Cited by 13 publications

References 0 publications

Advances in infrared gradient refractive index (GRIN) materials: a review

Advances in infrared gradient refractive index (GRIN) materials: a review

Polymeric graded-index lenses via digital light processing vat photopolymerization additive manufacturing

Femtosecond Laser Direct Writing of Gradient Index Fresnel Lens in GeS2-Based Chalcogenide Glass for Imaging Applications

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