Optical design of athermal, multispectral, radial GRIN lenses

Boyd, Andrew M.

doi:10.1117/12.2262072

Cited by 3 publications

(2 citation statements)

References 5 publications

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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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“…Gradient Index (GRIN) lenses offer additional degrees of freedom for optical designers by allowing the refractive index to change within the material. This helps making the optical systems more compact, with fewer optical elements, 1,2 and correct optical defects like chromatic aberrations. 3,4 GRIN fabrication in a accurate and controlled way has always been the main challenge.…”

Section: Introductionmentioning

confidence: 99%

GRIN materials for LWIR applications

Fourmentin,

Lavanant,

de la Barrière

et al. 2024

Advanced Optics for Imaging Applications: UV Through LWIR IX

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GRIN materials can help compensate chromatic aberrations and enhance athermalization in an optical system, leading to more lightweight and compact lens assemblies, often with a lower number of elements. For several years, Umicore and ISCR in Rennes have developed GRIN materials for systems, using several approaches to modify the index in a chalcogenide glass. We will mention two of the most promising paths in this review: partial and spatially controlled crystallization by fast heating of the perimeter of a glass rod and ionic exchange which modifies locally the glass composition, leading to local changes in refractive index.

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Infrared Gradient Refractive INdex (GRIN) Materials Through Fast Solid‐Solid Na⁺/Ag⁺ Ionic Exchange in Chalco‐Halide Glasses

Fourmentin,

Guichard,

Druart

et al. 2024

Adv Funct Materials

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In this work, a new two‐step process is developed by exchanging Na+ and Ag+ to create a radial GRIN infrared lens. The first step consists in introducing a high amount of silver by solid‐state ion exchange in the surrounding of the glass sample when the second one allows for controllable diffusion of Ag+ within the center of the sample by single heat treatment. Evolution of the refractive index and ∆n between the two extreme compositions of the GRIN are determined as function of the wavelength, predicting a ∆n of 1.42 × 10−1 at 10 µm. Qualitative characterization of the sample reveals the formation of a GRIN chalcogenide glass transparent in the MWIR and LWIR, presenting no detrimental crystallization of residual metallic silver on the edge of the sample. Wavefront measurement allows to quantitatively characterize the 10 mm diameter IR GRIN as a polynomial profile with a ∆n of 1.8 × 10−1 at 10.6 µm.

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Optical design of athermal, multispectral, radial GRIN lenses

Cited by 3 publications

References 5 publications

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

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

GRIN materials for LWIR applications

Infrared Gradient Refractive INdex (GRIN) Materials Through Fast Solid‐Solid Na⁺/Ag⁺ Ionic Exchange in Chalco‐Halide Glasses

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Optical design of athermal, multispectral, radial GRIN lenses

Cited by 3 publications

References 5 publications

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

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

GRIN materials for LWIR applications

Infrared Gradient Refractive INdex (GRIN) Materials Through Fast Solid‐Solid Na+/Ag+ Ionic Exchange in Chalco‐Halide Glasses

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Product

Resources

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Infrared Gradient Refractive INdex (GRIN) Materials Through Fast Solid‐Solid Na⁺/Ag⁺ Ionic Exchange in Chalco‐Halide Glasses