Photoelectric Conversion Unit

Conventional emission spectroscopy sparks the sample through a electrical discharge between the electrode and the sample, the light emitted by the electron jump is spectroscopically separated by an optical system, received by a photomultiplier tube and converted into an electrical signal, which is then processed by a computer to obtain the analytical results.

Conventional spectrometers use a large optical system to spectrate light of different wavelengths, and then use numerous photomultiplier tubes (PMT) to measure the light intensity of the corresponding spectral line for each element, with each program to be measured requiring a separate photomultiplier tube (a PMT is usually defined as a channel). The light incident on the incoming slit is dispersed and imaged on each of the outgoing slits by means of a concave grating, with a detector mounted behind the outgoing slit. All these optics have to be precisely positioned with an error of no more than a few microns, and the mechanical and thermal stability of the whole system is extremely important. Small deformations of the optics due to environmental factors such as vibrations and changes in temperature and humidity cause the optical path to deviate from its position, resulting in fluctuations in the measurement results. To reduce these effects, the optical system is usually placed on a rigid cast iron base at least half a metre long, which is why conventional spectrometers are so large and bulky.

Adopting the most advanced CCD technology, full-spectrum direct reading detection, overcoming the technical limitations of the traditional spectrometer, so that the analysis and detection of metal materials into a new digital era, the instrument's analytical ability than the traditional spectrometer has made a qualitative leap. Excellent analytical performance, very low operating costs, intelligent operation mode, the ability to adapt to multiple substrate samples, multi-element and multi-spectral lines of simultaneous reading ability, as well as flexible and convenient substrate and measurement elements to add the ability to upgrade, the improvement of these features are attributed to the application of advanced CCD digital technology.

The meaning of the abbreviation of photoelectric conversion element:

PMT (photo-Multiplier) 

PDA:Photo Diode Array 

CCD:Charge Coupled Device 

SCD:Segmented Arrarychayge Coupleddevice Detector

CID:Charge Injetion Detector