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Glasses internal transmission

Figure 10.2 Transmission curves of plates with thickness = 10 mm, for the most common optical materials bor-osilicate glass (BK7), fused silica (FS) and calcium fluoride (Cap2). Left external transmission (light reduced by the sum of internal loss tint = 1 lint) and the reflection loss Rat each surface) Right internal transmission. Note that the dips in the FS transmission curve correspond to OH absorption bands... Figure 10.2 Transmission curves of plates with thickness = 10 mm, for the most common optical materials bor-osilicate glass (BK7), fused silica (FS) and calcium fluoride (Cap2). Left external transmission (light reduced by the sum of internal loss tint = 1 lint) and the reflection loss Rat each surface) Right internal transmission. Note that the dips in the FS transmission curve correspond to OH absorption bands...
Langmuir-Blodged films have been deposited on many different substrates. The substrates used include different types of glass (such as quartz for UV-visible spectroscopy) CaF2 plates for transmission infrared spectroscopy silicon, germanium, and ZnSe plates for internal reflection infrared spectroscopy. For electrochemical applications, LB films... [Pg.60]

The light transmission technique is most frequently used for the determination of average bubble size in gas-liquid dispersion. It has the advantages of quick measurement and on-line operation. The probes are usually made of mirror-treated glass rods (Vermeulen et al., 1955), internally blackened tubes with mirrors (Calderbank, 1958), or fiber optic light guide (Hong and Lee, 1983). [Pg.234]

In the case of solid crystalline oxides, thermal conductivity decreases with increasing temperature but begins to rise above 1500— 1600 °C because transmission of heat by radiation (photons) begins to take a significant part besides the conduction of heat (phonon mechanism). In completely transparent materials (the coefficient of absorption a = O), no interaction with the radiation occurs in an opaque body (a = oo) the heat is transferred by conduction alone. With translucent materials, each element of the substance absorbs some of the incident radiation, and emits simultaneously,This internal radiation mechanism of heat transmission is characteristic for glasses. At high temperatures, a considerable proportion of heat is therefore transmitted by radiation the so-called apparent thermal conductivity is a sum of true conductivity with radiation conductivity ... [Pg.258]

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Internal transmission

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