Optical rotation of white light

Abstract

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Measurements of large optical rotary dispersion in the adipose eyelid of Atlantic mackerel ( Scomber scombrus )

“…For a given polarizer angle α , the intensity of light of wavelength λ transmitted through a homogeneous region (or pixel) with optical thickness A is given byIfalse(λfalse)cos2⁡(α−Aλ02λ2−λ02),where I ( λ ) is the intensity of incident light. If the incident visible-light spectrum is represented by a vector of RGB values I ( λ ) = ( R I ( λ ), G I ( λ ), B I ( λ )), where 380 nm ≤ λ ≤ 780 nm [39], then the transmitted RGB values M are given by the vectorright left.5emthickmathspacetruebold-italicM=(RM,GM,BM)=∫380 normalnm780 normalnmbold-italicI(λ)cos2⁡(α−Aλ02λ2−λ02)dλ.Note that similar approaches have been described in the education literature for analysing colour images arising from ORD [40]. Figure 5 b shows a colour map, where the optical thickness in the interval [0, A max ] is on the abscissa, the polarizer angle 0≤α≤180∘ is on the ordinate, and the optical thickness A = A 1 is highlighted with a vertical white line.…”

White-light versus discrete wavelength measurements of Faraday dispersion and the Verdet constant

“…This was repeated for spectra taken with a selection of analyser angles, the results of which are shown in figure 6. From these fits, the dispersion law can be extracted in a similar way to that described in [39]. The results obtained with complete spectrum polarimetry are given in table 2.…”

“…To characterise Faraday dispersion, we can either measure the rotation at discrete wavelengths [35,37] (vertical lines in figure 1) or at all wavelengths simultaneously using white light [22] (horizontal lines in figure 1). The white-light technique has also been used to measure optical rotation in other circularly birefringent media such as sugar solutions [39]. White-light has the advantage that only one source is required but the disadvantage that we also require a spectrometer.…”

Ảnh Hưởng Của Nhiệt Độ, Nồng Độ Và Bước Sóng Ánh Sáng Đến Góc Quay Cực Riêng Của Dung Dịch Chất Hoạt Quang

“…Phương pháp phân cực nghiệm là một trong các phương pháp quang học được sử dụng rộng rãi để xác định độ tinh khiết và nồng độ của đường do có ưu điểm nhanh chóng, thuận tiện, chính xác [2]. Rất nhiều nghiên cứu đã được thực hiện sử dụng phương pháp phân cực nghiệm như nghiên cứu khảo sát các yếu tố chính ảnh hưởng đến góc quay cực [3], ứng dụng định tính và định lượng một dung dịch bất đối [4].…”