All spectrometers & accessories
Double and triple spectrometers
Double Monochromators and Spectrographs
Model Omni-λ300Di / Omni-λ500Di
Two finely aligned monochromators in series, switchable between additive and subtractive dispersion. Additive mode doubles the effective focal length and resolution; subtractive mode holds the focal length and cuts stray light by two orders of magnitude.
Best for
High-resolution work in additive mode, and weak signals close to an intense excitation line — Raman especially — in subtractive mode.
Specifications
- Focal length (additive / subtractive)
- 640 / 320 mm (300Di); 1000 / 500 mm (500Di)
- Aperture ratio
- f/4.2 (300Di); f/6.5 (500Di)
- Resolution (additive / subtractive)
- 0.04 / 0.08 nm (300Di); 0.025 / 0.05 nm (500Di)
- Dispersion (additive / subtractive)
- 1.15 / 2.29 nm/mm (300Di); 0.75 / 1.49 nm/mm (500Di)
- Wavelength accuracy
- ±0.2 nm
- Wavelength repeatability
- ±0.025 nm
- Step size
- 0.005 nm
- Stray light (additive / subtractive)
- 1×10⁻⁷ / 1×10⁻⁹
- Optical axis height
- 146 mm
- Grating size
- 68 × 68 mm
- Turret
- Triple grating turret
- Slit
- Width 0.01–3 mm motorised or manual, height 2, 4 or 14 mm selectable; 24 mm motorised middle slit
- Dimensions
- 825 × 500 × 281 mm (300Di); 825 × 600 × 281 mm (500Di)
- Interface
- USB 2.0
Ordering options
Omni-λ300Di
320 mm stages, f/4.2, 640 mm additive focal length
Omni-λ500Di
500 mm stages, f/6.5, 1000 mm additive focal length
Gallery
