A monochromator is comprised of essential components that select a specific wavelength of light from a broader spectrum.
Based on the provided reference, the basic elements that make up a monochromator are arranged to disperse light and select a narrow band of wavelengths.
These core components work together in sequence as light passes through the instrument:
- Entrance slit: Where the broadband light enters the monochromator.
- Collimating mirror: Reflects the light from the entrance slit to form a parallel beam.
- Diffraction grating: This is the dispersive element. It splits the incoming parallel beam of light into its constituent wavelengths, sending each wavelength at a slightly different angle.
- Camera mirror: Collects the dispersed light from the diffraction grating and focuses it onto the exit slit.
- Exit slit: Located at the focal point of the camera mirror, this slit allows only the desired, selected wavelength (or a narrow range of wavelengths) to exit the monochromator.
Here's a summary of the basic components and their functions as described:
| Component | Function (as per reference) |
|---|---|
| Entrance slit | Where light enters |
| Collimating mirror | Forms a parallel beam after the slit |
| Diffraction grating | Dispersive element |
| Camera mirror | Focuses light from dispersive element onto exit slit |
| Exit slit | Where the selected wavelength exits |
Understanding these components is key to appreciating how a monochromator isolates specific wavelengths for various scientific and analytical applications.
