What is a diode array detector? The basic structure, advantages and disadvantages, working principle, application, classification, operating procedures, and development history of diode array detectors 1

The diode array detector (DAD) is a commonly used UCC3895DW optical detector used for spectroscopic measurements in analytical chemistry, such as infrared spectroscopy, ultraviolet spectroscopy, and fluorescence spectroscopy. It is composed of an array of multiple diodes, each diode corresponding to a detection channel, which can simultaneously measure optical signals of multiple wavelengths and achieve multi-channel simultaneous detection.

1、 Basic structure:

A diode array detector is composed of an array of multiple diodes. Each diode can independently detect light signals of specific wavelengths. Typically, a diode array detector consists of eight or more diodes, each corresponding to a specific wavelength range. These diodes are typically installed in a sealed metal casing to protect them from external light and environmental interference.

2、 Advantages and disadvantages:

advantage:

1. High sensitivity: Multi channel simultaneous detection improves detection sensitivity.

2. Wide dynamic range: can handle samples with different concentration ranges.

3. High resolution: With high resolution, it can accurately measure wavelengths.

4. Real time detection: It can monitor sample changes in real time.

5. Multi channel detection: It can simultaneously measure optical signals of multiple wavelengths, improving detection efficiency.

Disadvantages:

1. High price: Compared to other commonly used optical detectors, diode array detectors are more expensive.

2. Channel limit: Because each channel requires one diode, the number of diodes limits the increase in channel count.