An Instrument for Measuring the Direct Transmission Factor of Luminous Flux in Inhomogeneous Media

Ross, G.; Gray, Jamel; Eldridge, J L; Sanders, I.L.

doi:10.1080/713818398

Cited by 7 publications

References 8 publications

(9 reference statements)

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Determination of Optical and Dielectric Properties of Polymers by Vibrational Spectroscopy

Smith

Chughtai

2001

Handbook of Vibrational Spectroscopy

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Principles of refraction and extinction of electromagnetic radiation incident upon homogeneous isotropic condensed phases are reviewed. The relation between the complex refractive index, n ( ν ), and the attenuation constant, k ( ν ), through the Kramers–Kronig transform is shown as is the relation of these optical constants to ɛ , the complex dielectric function. The basis of the determination of the optical constants n and k as a function of frequency for transparent amorphous polymeric materials by reflection absorption infrared spectroscopy (RAIRS) is illustrated with examples. Also discussed is the effect of absorber concentration on the RAIR spectra. Various methods for the measurement of the optical constants and dielectric function of isotropic polymers included are other reflectance methods, attenuated total reflectance (ATR), transmittance–reflectance, transmission, and ellipsometry. The incipient importance of approaches for determining anisotropic optical constants is noted.

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Determination of Optical and Dielectric Properties of Polymers by Vibrational Spectroscopy

Smith

Chughtai

2001

Handbook of Vibrational Spectroscopy

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Polymer Optical and Dielectric Properties through Vibrational Spectroscopy

Smith

Chughtai

2001

Handbook of Vibrational Spectroscopy

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Principles of the refraction and extinction of electromagnetic radiation incident upon homogeneous isotropic condensed phases are reviewed. The relationship between the complex refractive index, n (υ), and the absorption index, k (υ), through the Kramers–Kronig transform is shown as is the relationship of these optical constants to ɛ, the complex dielectric function. The basis of the determination of the optical constants n and k as a function of frequency for polymeric materials by infrared reflection‐absorption spectroscopy (IR‐RAS) is illustrated with examples as are other external reflection methods. Also discussed is the effect of absorber concentration on the IR‐RA spectra. Various methods for the measurement of optical constants and dielectric function of isotropic and anisotropic polymers covered are internal reflection techniques such as attenuated total reflectance (ATR), transmittance‐reflectance, transmission, and ellipsometry. The chapter concludes with comments on new spectroscopic techniques with potential application to the determination of optical constants of polymers.

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Coherence and the radiation laws

Baltes¹

1977

Appl. Phys.

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An Instrument for Measuring the Direct Transmission Factor of Luminous Flux in Inhomogeneous Media

Cited by 7 publications

References 8 publications

Determination of Optical and Dielectric Properties of Polymers by Vibrational Spectroscopy

Determination of Optical and Dielectric Properties of Polymers by Vibrational Spectroscopy

Polymer Optical and Dielectric Properties through Vibrational Spectroscopy

Coherence and the radiation laws

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