What Are Photodetectors?

The principle of the photodetector is that the conductivity of the irradiated material changes due to radiation. Photodetectors have a wide range of uses in various areas of the military and national economy. In the visible or near infrared band, it is mainly used for ray measurement and detection, industrial automatic control, photometry, etc .; in the infrared band, it is mainly used for missile guidance, infrared thermal imaging, infrared remote sensing, and so on. Another application of the photoconductor is to use it as the target surface of a video tube. In order to avoid image blur caused by photo-generated carrier diffusion, high-resistance polycrystalline materials such as PbS-PbO, Sb2S3, etc. are used on the continuous film target surface. Other materials can adopt the method of inlaying the target surface. The entire target surface consists of about 100,000 individual detectors.

Photodetector

The principle of the photodetector is

Photodetectors can convert light signals into electrical signals. According to device pair

Application selection of photodetection devices,

In order to improve the transmission efficiency and transform the photoelectric signal without distortion, the photodetector must not only communicate with the measured signal,

Market analysis by function:

All-metal detector: can detect all kinds of metal impurities of different materials, so this product has the highest market share in the global market, and it is more popular with various users. And this product has a wide range of uses, mainly used for ferrous metals and non-ferrous metals in foods such as meat, fungi, candy, beverages, food, fruits and vegetables, dairy products, aquatic products, health products, additives and seasonings Detection of metal impurities; detection of metal impurities in chemical raw materials, rubber, plastics, textiles, leather, chemical fibers, toys; detection of metal impurities in medicine, health products, biological products, cosmetics, gifts, packaging, paper products; iron Metal detectors, also known as "needle detectors", "needle detectors" and "needle passers", can only be used to detect iron and metal impurities, and are mainly used in sewing products such as clothing and textiles to detect sewing. Broken needles in the product left over during the production process. Special reminder: Needle detectors cannot be used in the food industry, because needle detectors mainly rely on physical magnetic field and electromagnetic field magnetic detection (the detector head of the needle detector is a magnet). Reduced, so this device has a short service life, coupled with the needle detector can only detect ferrous metals, the market is facing the situation of elimination; aluminum foil metal detector: mainly used to detect aluminum film or aluminum platinum packaging products. Many medicines and foods produced in the industry are packaged in aluminum film or aluminum platinum, which can only be detected by such equipment. This product has a high level of technology and is relatively expensive. The general price is more than 300,000.