Dispersion of refractive index

In addition, combining the microscope with the use of a pulsed laser light source provides temporal information on these systems in a small domain. The dispersion of refractive index, however, strongly affects the temporal resolution in the measurements of dynamics under the microscope and typical resolution stays around 100 fs when a Ti Sapphire laser is used as an excitation source. 

Fig. 17. Wavelength dispersion of refractive index of a hetero Y-type LB film consisting of C12PPy and arachidic acid.

In the visible region, the dispersion of refractive index is often described by the Abbe number, vj is given by... 

The computations of the Moffitt parameters (see Equation 2), utilizing the statistical procedures with error analyses developed by Sogami, Leonard, and Foster (57) to determine the best Xo values, and of the Drude parameters see Equation 1 a modified Drude plot of [mf] vs. [ra ]X2 (67) was used with error analyses were performed with the IBM 7094 computer. Correction for the dispersion of refractive index of the solvent was made as outlined (46). 

M KC1 were obtained on a Rudolph model 200 polarimeter as described by Riddiford and Scheraga (48) and are the same as shown in Figure 2 of that paper they have been recalculated to incorporate the correction for the dispersion of refractive index of water (16). The best X0 for these data in 0.3M KC1 is 215 m/z, but the points on the figure are those calculated with Xo as 212 m/z since that is the best value for the more accurate Cary data in 0.6ilf KC1 (the circles) for which the line shown is computed. 

The thickness, dispersion of refractive index, and absorption of the obtained films were measured on a spectral elUpsometer FIlipw developed at the AV.Rzhanov Institute of Semiconductor Physics SB RAS (http //www.isp.nscru/). The optical parameters of the film according to ellipsometric parameters delta (A) and p i ( P) were found by approximating the single-phase model of the Si-substrate/ absorbing film. 

Figure 3.11. (a) Calculated ATR spectra of SiOa layer 2.5 nm thick on Ge for s-polarization (short-dashed line) and p-polarizarion (solid line) at = 15° p) dispersion of TO (short-dashed line) and LO (long-dashed line) energy loss functions and s and Re(e) (solid line) of Si02 (c) dispersion of refractive index n and extinction coefficient k of CVD Si02 after Rakov [52]. 

From the practical point of view, methods of the control of gradient formation on spherical surface attracts the attention of researchers because of the spherical lenses have the defects of pictures - geometrical and chromatic aberrations. The removal of such effects is usually achieved by combination of some spherical lenses with various ciuvatures, of refractive index and dispersion of refractive index. For this reason, the design of modem optical devices is complicated. 

Z. Jaksic, O. Jaldic, Dispersion of refractive index in degenerate mercirty cadmium tellirride, pp. 95-98... 

Dispersion staining is useful for rapid deterrnination of refractive index and dispersion. It is appHed most often, however, for needle-in-a-haystack detection of any particular substance in a mixture such as chrysotile in insulation, cocaine in dust samples, quartz in mine samples, or any particular mineral, eg, tourmaline, in a forensic soil sample. 

Besides appHcation as heat-resistant molding powders for electronic and other appHcations, DAIP copolymers have been proposed for optical apphcations. Lenses of high impact resistance contain 50% DAIP, 20% benzyl methacrylate, and larger amounts of CR-39 (59). A lens of refractive index 71- = 1.569 andlow dispersion can be cast from phenyl methacrylate, DAIP, and isopropyl peroxide (60). Lenses of better impact properties can be obtained by modifying DAIP with aHyl benzoate (61). 

Were it not for dispersion—the refractive index depends upon wavelength— the aesthetic appeal of rainbows would be greatly diminished. Indeed, the word rainbow used in everyday speech evokes images of a profusion of colors—the colors of the rainbow—rather than just an intensely bright arc in the sky. If we take m = 1.343 as the refractive index of violet light (X — 0.4 jam) and m = 1.331 as the refractive index of red light (X = 0.65 jam) (Irvine and Pollack, 1968), then the angular widths of the primary and secondary rainbows are about 1.7° and 3.1°, respectively. 

Table I. The dispersion of the index of refraction of DMAPN(23 wt %)/PMMA films before and after photolysis through a 361 nm interference filter...

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