directly viewed infrared image tube

例句：

1. 1. The infrared camera can detect objects that aretoo far away to be seen with thenaked eye.
   红外相机可以检测到肉眼无法看到的物体。
2. 2. Infrared technology isused in many applications, such as remotecontrol and communication systems.
   红外技术在许多应用中被使用，如遥控和通信系统。
3. 3. The infrared sensorsin the device can detect temperature changes inthe environment.
   设备中的红外传感器可以检测环境的温度变化。