通过智能手机和智能手表在血液中监测诸如血液中的脉冲或氧气饱和度的生命体征，已经可以使用几年。环境光传感器的相应UV通道TSL2585来自AMS Osram检测到自然阳光下的UV-A辐射量。这使得用户能够警告过多的UV-A辐射。由于其极其紧凑的尺寸，传感器非常适合空间限制的可穿戴和其他移动应用。
While the UV-C portion of sunlight is blocked by the earth’s atmosphere, UV-A and UV-B radiation reaches the earth’s surface. UV-B radiation penetrates only the upper layers of the skin and is responsible for sunburn. UV-A radiation, which accounts for around 90% of the UV component that reaches the earth’s surface, penetrates much deeper into the lower layers of the skin and can, in some cases, have significant health consequences – from weakening of the connective tissue to faster aging of the skin and a higher probability to develop skin cancer. With the help of the new ambient light sensor from ams OSRAM, smartwatch users can now be warned as soon as the UV-A dose in their environment becomes too high.
“短的一体化时间和高灵敏度TSL2585enables reliable detection of ambient light even when placed under low transmissivity materials and OLED displays. Its small form factor and design offers enormously increased industrial design freedom for manufacturers,” said Barry Guo, Marketing Manager at ams OSRAM. The ambient light sensor utilizes ams OSRAM’s advanced interference filters which are precisely deposited on each photodiode pixel to create a 315nm-400nm UVA channel, a human-eye response photopic channel and an IR channel. Those provide essential information for indoor /outdoor identification, UV index calculation and ambient illuminance detection. Additionally, theTSL2585独特的边缘光电二极管放置支撑非常窄的μBezel设计。
TSL2585has integrated light flicker detection on-chip and is equipped with three modulators with up to 14 kHz fast sampling rate. By providing the illuminance information and ambient light flicker information to the phone camera, it supports fast auto-exposure of smartphone camera and removal of banding effects caused by flicker from environmental lighting.
极扁平封装的紧凑尺寸仅为2.0 mm x 1.0 mm x 0.35 mm，允许节省空间的系统设计帮助极其紧凑的设备的制造商。传感器可以在1.8V的电压下操作，并在非活动时耗尽0.7μA。
Filed Under:Sensor Tips
