2mm Silicon BEAMSPLITTER
Description
In Fourier Transform spectroscopy at long wavelengths, the far infrared or terahertz spectral range, the standard beamsplitter is the pellicle mylar film. The pellicle thickness is chosen to give a peak maximum beamsplitter efficiency at a desired frequency because of interference in the thin film.
This beamsplitter can be used for the entire spectral range normally covered by mylar (25 - 1000 inverse cm). The average efficiency is better than the maximum efficiency of the mylar beamsplitters. The maximum spectral resolution is set by the thickness of the Si element (0.7 inverse cm for a 2 mm thickness). The high purity Si is ideally transparent except for a narrow (10 inverse cm) phonon absorption band at 600 inverse cm. Therefore a single Si beamsplitter provides a uniform average efficiency that replaces the mylar for spectroscopy with a resolution set by the thickness of the Si element.
2mm Silicon BEAMSPLITTER
Specifications |
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|---|---|
| Largest Dimension: | N/A mm |
| Thickness: | 2 mm |
| Substrate: | Custom |
| Wavelength Range: | 1100-7000nm |
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Frequently Asked Questions
If you do not have an infrared viewer, you can align the silicon beamsplitter by adjusting the screws so that the reflection of your eye is continuous from the silicon beamsplitter across to the center island beamsplitter, and then adjusting the screws to maximize the interferogram.
The silicon beamsplitter assembly should be placed into the holder in the same manner as the mylar beamplitters, with the arrow on the silicon beamsplitter pointing towards the front of the holder.
The maximum spectral resolution is set by the thickness of the Si element, which is 0.7 inverse cm for a 2 mm thickness.
The silicon beamsplitter can be used for the entire spectral range normally covered by mylar, which is 25 - 1000 inverse cm.
The standard beamsplitter used in Fourier Transform spectroscopy at long wavelengths is the pellicle mylar film.