Rear-silvered mirror

Figure 5.24. Field-widened interferometer designed by Bouchareine and Connes [29]. The movable rear-silvered mirror is translated in a direction perpendicular to that of a conventional Michelson interferometer, so that the OPD is increased by increasing the distance traveled through the prism. (Originally reproduced from [29], by permission of the author.)...

Figure 3.1 Schematic diagram of an AAS spectrometer. A is the light source (hollow cathode lamp), B is the beam chopper (see Fig. 3.2), C is the burner, D the monochromator, E the photomultiplier detector, and F the computer for data analysis. In the single beam instrument, the beam from the lamp is modulated by the beam chopper (to reduce noise) and passes directly through the flame (solid light path). In a double beam instrument the beam chopper is angled and the rear surface reflective, so that part of the beam is passed along the reference beam path (dashed line), and is then recombined with the sample beam by a half-silvered mirror.

The conventional mirror, a glass plate which is silver-plated on the rear surface by a chemical process, is a rear surface mirror. Radiation first passes through the glass substrate and is then reflected on its rear surface. 

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