• Spectral Range from Deep UV to IR (180 nm to 75µm)
• Excellent stray light rejection
• Interchangeable Grating Turrets
• 3 Gratings per Turret
• Additive & Subtractive Dispersion
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Additive-Mode
The first monochromator stage disperses the spectral radiation into separate wavelength components, allowing a specific bandpass to enter the second monochromator. The second monochromator stage re-disperses the light, increasing spectral dispersion while further reducing stray light levels
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Subtractive-Mode
In subtractive mode, the first and the second stages of spectrometer work as a tunable bandpass filter to allow only the desired portion of spectrum to pass through. A polychromatic light enters the first stage through the entrance slit and is dispersed by the first grating. The intermediate Slit acts as a bandpass filter passing only the light between wavelengths λ1 and λ2. The grating in the second Stage recombines all the dispersed light and focuses it into exit slit, producing again a polychromatic light limited to the spectral range between wavelengths λ1 and λ2.
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Spectrograph
• Double Spectrometer/ Spectrographs with different focal length
DM33i with 2x300 mm focal length
DM55i with 2x500 mm focal length
DM77i with 2x750 mm focal length
• Additive and Subtractive Dispersion
• Image corrected optics provide superior imaging quality
• Multiple entrance and exit ports
• Interchangeable Grating Turrets with 3 gratings per turret per stage
(up to 18 gratings on 6 turrets possible)
• Motorized Entrance and Exit Slits with 0 to 3 mm or 0 to 12 mm width
• Motorized Intermediate Slits with 0 to 12 mm width
• Optional Silver or gold coated mirrors
• Choice of more than 100 gratings available for the best spectral range, throughput and dispersion
• Stepping motor scanning system with microprocessor control provides superior precision and repeatability of wavelength positioning
