Color correction in the infrared using gradient-index materials

Corsetti, James A.; McCarthy, Peter W.; Moore, Duncan T.

doi:10.1117/1.oe.52.11.112109

Cited by 28 publications

(13 citation statements)

References 15 publications

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“…An achromatic doublet could be replaced by a singlet with the addition of a GRIN component, as suggested in ref. . The larger the magnitude of the separation between the Abbe number of the base glass and the GRIN component, the larger the potential for a GRIN achromatic singlet.…”

Section: Resultsmentioning

confidence: 99%

Infrared Glass–Ceramics with Multidispersion and Gradient Refractive Index Attributes

Sisken

Kang

Veras

et al. 2019

Adv Funct Materials

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Infrared (IR) glass-ceramics (GCs) hold the potential to dramatically expand the range of optical material solutions available for use in bulk and planar optical systems in the IR. Current material solutions are limited to single-or polycrystalline materials and traditional IR-transparent optical glasses. GCs that can be processed with spatial control and extent of induced crystallization present the opportunity to realize an effective refractive index variation, enabling arbitrary gradient refractive index elements with tailored optical function. This work discusses the role of the parent glass composition and morphology on nanocrystal phase formation in a multicomponent chalcogenide glass. Through a two-step heat treatment protocol, a Ge-As-Pb-Se glass is converted to an optical nanocomposite where the type, volume fraction, and refractive index of the precipitated crystalline phase(s) define the resulting nanocomposite's optical properties. This modification results in a giant variation in infrared Abbe number, the magnitude of which can be tuned with control of crystal phase formation. The impact of these attributes on the GCs' refractive index, transmission, dispersion, and thermo-optic coefficient is discussed. A systematic protocol for engineering homogeneous or gradient changes in optical function is presented and validated through experimental demonstration employing this understanding.

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Section: Resultsmentioning

confidence: 99%

Infrared Glass–Ceramics with Multidispersion and Gradient Refractive Index Attributes

Sisken

Kang

Veras

et al. 2019

Adv Funct Materials

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“…The internal GRIN profile, when combined with refraction from the surfaces of the optic, provides the optical designer an additional degree of freedom that may be used in various ways including providing additional optical power or correction of chromatic aberration. 7 GRIN optics for visible wavelengths have been found in nature in the eyes of humans 8 and fish, 9,10 and have been demonstrated in laboratory environments [11][12][13] and commercialized in limited sizes and quantities. Various techniques have been utilized to fabricate GRIN optics for visible light including glass element diffusion, 14 ion exchange in glass, 15 and polymer nanolayer extrusion.…”

Section: Introductionmentioning

confidence: 99%

Diffusion-based gradient index optics for infrared imaging

et al. 2020

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New moldable, infrared (IR) transmitting glasses and diffusion-based gradient index (GRIN) optical glasses enable simultaneous imaging across multiple wavebands including shortwave infrared, midwave infrared, and long-wave infrared, and offer potential for both weight savings and increased performance in optical sensors. Lens designs show potential for significant reduction in size and weight and improved performance using these materials in homogeneous and GRIN lens elements in multiband sensors. An IR-GRIN lens with Δn ¼ 0.2 is demonstrated. © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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“…These optical systems usually use the electromagnetic radiations in atmospheric window of mid-infrared region covering from 3 to 12 μm [ 1 , 2 , 3 , 4 ]. As per reported literature, the infrared crystalline materials have been conventionally deployed to fabricate infrared lenses [ 5 , 6 , 7 ]. However, the evolution of optical systems using crystalline materials possesses drawbacks like being time-consuming, expensive and very difficult for mass production.…”

Section: Introductionmentioning

confidence: 99%

Engineering of TeO2-ZnO-BaO-Based Glasses for Mid-Infrared Transmitting Optics

Linganna

Kim

et al. 2020

Materials

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In this paper, the glass systems, TeO2–ZnO–BaO (TZB), TeO2–ZnO–BaO–Nb2O5 (TZB–Nb) and TeO2–ZnO–BaO–MoO3 (TZB–Mo), were fabricated by the traditional melt-quench protocol for use as mid-infrared (mid-IR) transmitting optical material. The effect of Nb2O5 and MoO3 on the key glass material properties was studied through various techniques. From the Raman analysis, it was found that the structural modification was clear with the addition of both Nb2O5 and MoO3 in the TZB system. The transmittance of studied glasses was measured and found that the optical window covered a region from 0.4 to 6 μm. The larger linear refractive index was obtained for the Nb2O5-doped TZB glass system than that of other studied systems. High glass transition temperature, low thermo-mechanical coefficient and high Knoop hardness were noticed in the Nb2O5-doped TZB glass system due to the increase in cross-linking density and rigidity in the tellurite network. The results suggest that the Nb2O5-doped TZB optical glasses could be a promising material for mid-infrared transmitting optics.

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Color correction in the infrared using gradient-index materials

Cited by 28 publications

References 15 publications

Infrared Glass–Ceramics with Multidispersion and Gradient Refractive Index Attributes

Infrared Glass–Ceramics with Multidispersion and Gradient Refractive Index Attributes

Diffusion-based gradient index optics for infrared imaging

Engineering of TeO2-ZnO-BaO-Based Glasses for Mid-Infrared Transmitting Optics

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