Attenuation coefficient

In fact, the p-polarized light decreases to zero reflectance at one angle, known as the Brewster angle. At this angle reflected light must be entirely s- ...

Waterabsorptionspectrum

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Transmittance

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Near infrared wavelengths typically studied extend from around 700nm to 1000nm. Mid and far IR radiation are not thought of as biologically active but still ...

Absorptionspectrum

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We offer a wide range of fiber optic products, including kits, illuminators, and cables. Explore our collection and find the perfect solution for your next ...

18 bi-color LED ring light with built-in diffusion Power with AC adapter or two NP-F750 Li-Ion batteries (both included) Adjustable temperature range ...

Stimulated emission

Two-photonabsorption

In this article we explore what polarization is, and how it may be obtained from an unpolarized light source.

Absorbance

White light interferometry is a measuring method to acquire the shape of 3D surfaces very accurately. The paper presents an analysis of white light ...

Jan 25, 2023 — An ultraviolet (UV) filter is a clear-glass photographic filter that is attached to the front of a lens that blocks incoming ultraviolet light rays from ...

A theoretical treatment has been developed for the optical properties of a layered structure which absorbs and scatters light. This theory predicts that the logarithm of the inverse of reflectance (LIR) of the surface should be a useful parameter for the examination of that structure. This approach has been applied to a study of skin in vivo. An instrument was constructed for use in clinical situations to measure the LIR spectrum of skin over the visible region of the spectrum (450-760 nm). The contributions to the observed spectra made by pigments and the skin structure were deduced by reference to the theoretical model. Numerical indices were used to quantify the changes in skin haemoglobin content following the application of vasoconstricting preparations. The indices also provided a means of measuring erythema and melanin pigmentation induced in the skin by exposure to ultraviolet radiation. The assessments made using this instrument were more reproducible and sensitive than judgments made by eye.

Collimated light is light whose rays are parallel. This light spreads slowly as it travels. The word collimated is related to collinear.

Light that has been polarized is useful because it enables the user to be selective over what part of the electromagnetic spectrum is used (whether for ...