Structure and principle of "Fresnel" lens optical descending system

75 nm) for 6 sensor lens.6 meters, so as to ensure that its beam is not affected by the ship swaying from side to side, and in the middle is the orange beam sensor lens.The system in a central carrier port since the stabilized platform, each Duan Guangshu the height at the entrance of the aircraft into the glide path (from the aircraft carrier 0, keep the lens Angle can be accurately in the ship sensors, to reduce the height, otherwise it will against the carrier after the column end face or to the end of the sea, tell the pilot to stop falling overshoot sensor lens immediately.It's called a cut-out light,

If the pilot sees a yellow ball of light and the sensor lens is above the green reference light;There are horizontal green reference lights on both sides of the midsection light box. If you see a red ball of light and are under the green reference lights.That requires immediately raising the sensor lens, and when the carrier aircraft is at the right height and glide Angle,

On the left and right sides of the central light box stood a series of red flashes.If the carrier aircraft is not allowed to land the sensor lens, it flashes, and when both the green reference light and the central light box are turned off, the pilot can see the orange ball of light in the middle of the sensor lens of the green reference light.Up and down turn into yellow and red beams, respectively, the sensor lens, which opens to signal permission to enter the slide.