Spectrometers & monochromators
Omni-λ180Di Subtractive Double Monochromator
An integrated 180 mm double monochromator in subtractive dispersion. Two matched stages suppress stray light for monochromatic excitation and detector-response calibration.
Best suited to
Measurements where a small out-of-band contribution can dominate a weak signal.
Selecting a configuration
Choose the output bandwidth and usable wavelength range with the source and detector. This subtractive configuration provides monochromatic output; select an additive double spectrograph when an array spectrum is needed.
Measurement & configuration
- Integrated dual-stage optical bench.
- Software-controlled wavelength scanning and intermediate slit.
- Dual gratings for configurable UV–visible–NIR coverage.
Plan the signal path
- 1Input spectrum
- 2Subtractive stages
- 3Monochromatic output
Specifications
| Focal length | 180 mm |
|---|---|
| Aperture | f/3.9 |
| Grating | 40 × 40 mm |
| Resolution | 0.25 nm |
| Dispersion | 3.7 nm/mm |
| Wavelength accuracy | ±0.2 nm |
| Repeatability | ±0.1 nm |
| Stray light | <1 × 10⁻⁹ |
| Control | USB 2.0 |
Configuration note: Optical figures are published for a 1200 lines/mm grating. The source uses both 180Di and 180D names.
Related spectrometers & monochromators
Configure Omni-λ180Di / Omni-λ180D
Send the wavelength interval, signal level, timing and sample requirements for your experiment.