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66 . Spotlight 200 User's Guide
Techniques for Collecting Spectra
This chapter describes how accessories and collection techniques enable you to collect
spectra from different types of sample.
Using the Compression Cell
The optional compression cell (part number N1870185, Figure 19) enables you to flatten soft
materials. It also enables you to hold specimens flat and in optical contact with salt windows.
The cell consists of an aluminum block, machined to accept salt windows, with window
retainers and a special wrench to apply pressure across the windows. The sample is held
between the two windows. The compression cell fits into the sample slide holder on the
stage of the microscope. Windows with thicknesses equal to 1 mm and 2 mm, and outer
diameter equal to 13 mm can be used with the cell. Two KBr windows (2 mm thickness) are
included with the system. The cell can apply pressure without rotating the windows, and
therefore avoids scratching them.
Figure 19 The Compression Cell
Although samples can be thinned using the compression cell, it does not replace the
miniature diamond anvil cell as a sample-thinning device. The primary application of the
compression cell is for keeping specimens flat over the entire visual field of view.
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