Apparatus for evaluating beacon lights, in particular on runways and taxiways for airplanes having a light diffusing reflection box
AssigneeAeroport de Paris
InventorRobert Cernon
Life of this patent
Estimating the term…
Abstract
The present invention relates to apparatus for in-situ evaluation of the light flux of narrow and intense light beams, in particular those from the beacon lights of airport runways and taxiways. It comprises a closed box mounted in a pod placed on a moving chassis, the box has a translucent front face that diffuses the light flux from the beam to be measured omni-directionally inside the box, and another face having high diffusing reflection power that closes the box and provides both reflection and diffusion of the light in uniform manner towards a photoelectric sensor whose sensitive portion is disposed close to the front face, but facing said diffusing reflection face.
Claims10
Apparatus for in-situ elevation of the light flux of intense and narrow light beams, in particular from runway beacon lights, the apparatus comprising a towed chassis, and an encoding wheel for determining the distance travelled between two lights, which apparatus further includes a pod designated to receive a closed box in which a photoelectric sensor is disposed, said box having a translucent front face diffusing the light flux from a beam to be measured omnidirectionally inside the box, and at least one other face provided with high diffusing reflection power, wherein the light flux is reflected and diffused in uniform manner towards the sensor whose sensitive portion is located in the vicinity of said front face, but faces towards said diffusing reflection face.
Dependencies are inferred from the claim text.