Principle of spectrometer

According to the principle of dispersive elements, spectrometers can be divided into prism spectrometers, diffraction grating spectrometers and interference spectrometers. Optical multi-channel analyzer (oma) is a new type of spectrum analyzer with photon detector (ccd) and computer control developed in recent decades. It integrates information collection, processing and storage functions.

OMA no longer uses photosensitive latex, avoiding and eliminating darkroom processing and a series of tedious post-processing processes. The measurement work has fundamentally changed the traditional spectral technology, greatly improved working conditions and increased work efficiency. .

Using oma for spectral analysis, the measurement is accurate, fast, convenient, sensitive, fast response time and high spectral resolution. Measurement results can be read off the display or output immediately by printers and plotters. It has been widely used in almost all spectral measurements, analysis and research work, especially in the detection of weak and transient signals.

Extended information

A typical spectrometer mainly consists of an optical platform and a detection system. It includes the following main parts:

1. Incident slit: The object point of the spectrometer imaging system is formed under the irradiation of incident light.

2. Collimating element: turns the light emitted from the slit into parallel light. The collimating element can be a separate lens, a mirror, or directly integrated on a dispersive element, such as a concave grating in a concave grating spectrometer.

3. Dispersion element: Usually a grating is used to disperse the optical signal into multiple beams according to wavelength in space.

Reference materials?

Baidu Encyclopedia—Spectrometer