Solid photodetector uses a very broad. CdS photosensitive resistance because of its low cost and the brightness control (such as camera AE) obtained in use; photocell photovoltaic device is a solid device with the largest photosensitive area, which in addition to use as the sensing element, but also for the solar energy converter; silicon photodiodes is small, fast response, high reliability, and in the visible and near infrared bands have high quantum efficiency, the storm and get used in various industrial control. Due to high gain silicon avalanche control, fast response, low noise optical products, which in communication with the fiber laser ranging widely used. Photoemission device: photocell and the photomultiplier is a typical photoelectron emission type (external photoelectric effect) detector element. Its main features are high sensitivity applications of optoelectronic products and maintenance, stability, good advertising optoelectronic products, fast response and little noise, it is a current amplifying device. Especially photomultiplier having a high current gain, is particularly suitable for the detection of weak optical signals; but complex structure, high voltage, a larger volume. Huangpu District of optoelectronic products manufacturing _ _ gold-precision optical products provided by Huizhou Hing Precision Parts Co., Ltd.. Huizhou Hing Precision Parts Co., Ltd. (hzjxbp.com) (www.hzjxbp.com) strong, credible, in Huizhou, Guangdong standard mold industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Jinxing into the brilliant precision and you work for a better future!