Optical glasses for IR transmittance

Feltz, A.; Burckhardt, W.; Voigt, B.; Linke, D.

doi:10.1016/0022-3093(91)90077-j

Cited by 27 publications

(11 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compared with the case of controlling n of optical glasses in the visible spectrum, however, such formulations have been hardly available as for optical glasses in the LWIR spectrum. In addition, we notice that the existing CGs capable of transmitting the LWIR range are all classified as low-dispersion glasses 8 – 10 . For example, the commercialized Ge-Sb-Se glasses unanimously feature Abbe numbers for the LWIR region, i.e., , greater than 100 10 , which is defined as using n values measured at 8 μm, 10 μm and 12 μm, i.e., n 8 , n 10 and n 12 , respectively.…”

Section: Introductionmentioning

confidence: 99%

Unravelling interrelations between chemical composition and refractive index dispersion of infrared-transmitting chalcogenide glasses

Lee

Choi

et al. 2018

Sci Rep

View full text Add to dashboard Cite

A facile procedure for compositional screening of chalcogenide glass (CG) is proposed to manage its infrared transmission edge (ωc) as well as refractive index dispersion (ν) in the long-wavelength infrared (LWIR) range. Both ωc and ν of CG turn out to be interpretable simply in connection with its chemical composition based on a postulation that CG behaves as a single average harmonic oscillator (SAHO). In this SAHO model, ωc is expressed as a function of molar mass and average bond energy, both of which are easily accessible for a given CG composition. Two prototypical CG-forming systems in Ge-Sb-Se and Ge-Sb-S compositions exemplify the empirical compositional dependence of ωc, which further plays a decisive role in determining ν. Following the present approach, a set of highly dispersive CG compositions in the Ge-Sb-S system is newly unveiled together with low-dispersion Ge-Sb-Se glasses. It is then experimentally demonstrated that a doublet lens configuration consisting of convex and concave lenses with low and high ν values, respectively, is able to reduce the optical aberrations. This finding presents an opportunity that ν can be envisaged just based on the compositional ratio of CG, thus facilitating completion of the LWIR Abbe diagram.

show abstract

Section: Introductionmentioning

confidence: 99%

Unravelling interrelations between chemical composition and refractive index dispersion of infrared-transmitting chalcogenide glasses

Lee

Choi

et al. 2018

Sci Rep

View full text Add to dashboard Cite

show abstract

“…This difference would provide a new possibility as optical lens material for multispectral imaging system. Indeed, to eliminate chromatic aberration, the combination of two lenses of different values of the dispersion is needed in a spectral band [21]. For the visible and 8-12µm, the similar values reveal reduced choice to correct chromatic aberration in these bands for optical system.…”

Section: Refractive Index and Chromatic Dispersionmentioning

confidence: 99%

Moldable multispectral glasses in GeS2–Ga2S3–CsCl system transparent from the visible up to the thermal infrared regions

Bréhault

Calvez

Adam³

et al. 2016

Journal of Non-Crystalline Solids

View full text Add to dashboard Cite

“…[ 4,5 ] Some Ge‐based and As‐based selenide compositions are commercially available for use as molded LWIR lenses, but the commercialized ChG compositions are mostly classified as a low‐dispersion glass. [ 6–8 ] This rationalizes that ChGs need to be increased more in number to configure lens assembly, satisfying strict requirements as to imaging quality. In other words, the LWIR Abbe diagram needs to be broadened further to fully utilize the resulting degrees of freedom in designing LWIR lens assembly with minimized optical aberrations.…”

Section: Introductionmentioning

confidence: 99%

Compositional Dependence of Infrared Transmission in Ge‐Based Chalcogenide Glasses

Kim

Lee

et al. 2020

Physica Status Solidi (b)

View full text Add to dashboard Cite

As for an optically homogeneous glass with thickness tantamount to a few millimeters, the longer wavelength side of its optical transmission window normally takes shape as a result of multiphonon absorption. Mainly due to the complexity inherent in glass structures, a quantitative numerical assessment of the vibrational spectrum of a given glass composition is normally not a simple task. The conspicuously dissimilar infrared transmission edges between oxide and halide glasses, for example, can be understood qualitatively in terms of the Szigeti relation; however, the relatively insignificant but clearly distinguishable changes in infrared transmission edge resulting from compositional modification in a glass‐forming system are lacking a numerical assessment. Herein, it is experimentally verified that the infrared transmission edge of Ge‐based chalcogenide glasses can be correlated in a quantitative manner with their chemical composition through combining their average bond energy and molar mass. Ternary or quaternary chalcogenide glasses exceeding 100 different compositions are used to justify this numerical correlation.

show abstract

Optical glasses for IR transmittance

Cited by 27 publications

References 18 publications

Unravelling interrelations between chemical composition and refractive index dispersion of infrared-transmitting chalcogenide glasses

Unravelling interrelations between chemical composition and refractive index dispersion of infrared-transmitting chalcogenide glasses

Moldable multispectral glasses in GeS2–Ga2S3–CsCl system transparent from the visible up to the thermal infrared regions

Compositional Dependence of Infrared Transmission in Ge‐Based Chalcogenide Glasses

Contact Info

Product

Resources

About