Optical cryostat
A technology of ellipsometry and cryostats, applied in measuring devices, scientific instruments, material analysis through optical means, etc.
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[0007] Such as figure 1 As shown, an optical cryostat for ellipsometric measurement includes a rotatable support 1 and a sample holder 4 mounted on the support 1 for fixing samples. The cryostat also includes a sample chamber 3 and a sample chamber 3. A cooling device that provides a cold source. On the wall of the sample chamber 3, an incident window 2 and an exit window 5 made of quartz material are provided with adjustable relative positions. The sample holder 4 is set in the sample chamber 3. When using a photometric ellipsometer for measurement, the material sample to be measured is fixed on the sample holder, the cold source provided by the refrigeration device makes the sample chamber where the sample is located reach the required temperature, and the linear polarization is polarized from a certain incident angle direction each time. When light is projected onto the sample, the relative positions of the entrance and exit windows on the wall of the sample chamber can be ...
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