Vacuum Spectrometer: A Compact Monochromator for the 100-600 nm region
Based on a single holographic concave aberration corrected grating, the H20-UVL is a monochromator covering the range 100-600 nm. His extremely compact design is ideal for lighting samples or making low resolution measurement when equipped with a single channel detector. A spectrograph version for multi-channel detector is also available upon request.
Applications:
The H20-UVL is a monochromator especially designed for analyzing 100-600 nm (2 to 12.4 eV) far UV (FUV) range when using under vacuum, or 190-600 nm at atmospheric pressure. This simple optical design dramatically reduces astigmatism and results in excellent throughput and spectral purity, even below 140 nm, where other instruments based on Czerny Turner design loose their efficiency because of the number of internal reflections and the working angles of their optics. Its micrometric slits and its worm drive make its scans precise and fast.
This short focal length vacuum monochromator is ideal for sample illumination if equipped with a VUV light source, or for FUV low resolution analysis with a single PMT or silicon detector. A spectrograph version for one inch CCD detector or MCP (Micro Channel Plate) is available on request.
Optical design | Spherical Type IV VLS single optic |
Focal length | 200 mm |
Aperture | f/4.2 |
Grating density | 1200 gr/mm |
Optic coating | MgF2 optimized at 121 nm |
Deviation angle | 64° |
Dispersion | 3.6 nm/mm at 100 nm |
Drive | Fast worm drive |
Minimum step | 0.06 nm |
Speed | 400 nm/s |
Accuracy | +/- 0.1 nm |
Repeatability | +/-0.06 nm |
Resolution | Better than 0.1 nm |
Vacuum | 5 10-6 mbar |
Pumping flange | DN63 LF |
Entrance/exit port | Micrometric slits (10 um to 2 mm) |
Entrance/exit flange | DN25 KF |
PC interface | built-in USB2, no additional controller |
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