紅外發光二極管維護守夜

　　在當今日益安全意識的世界，閉路電視攝像機市場正在繼續擴大全球。先進的IP視頻等技術正在推動網絡系統和物聯網的增長。優越的壓縮標準和更快的圖像處理正在擴大應用潛力。無論是用于訪問控制，入侵警報或一般犯罪預防，半公開或隱蔽的方式，在室內或室外，央視廣泛應用在消費/私營部門，零售和工業廠房，在公共、民用和軍事應用的公民和政府大樓。

　　當涉及夜視和低光照水平時，紅外發光二極管是關鍵部件。例如，紅外LED照明模塊是當今大多數閉路電視系統的重要組成部分，通常結合了先進的圖像增強和控制電子功能。重要的是，現代紅外發光二極管技術更先進，更可靠和更持久的持久性比早期世代。

　　This article will consider the selection criteria and design constraints for IR LEDs when used in CCTV camera systems， particularly for applications such as access control. The range required， for example， can be from just a few meters to 100 meters or more. High power devices deliver increased optical output， and a wide range of emission angles is available. The specific application will determine the combination of parameters required in IR LEDs. For example， far reaching illumination requires high power and a narrow cone; wide-angle devices are better suited to near-field visibility applications.

　　With reference to a detailed Application Note from Osram， the article will highlight the application of specific devices in the Osram Oslon Black ranges. These include the SFH4715S and SFH4725S.