Lead'Air Inc. has announced innovative new aerial survey
Lead'Air Inc. has announced innovative new aerial survey multi-focal lenses at the 2019 INTERGEO in Stuttgart, Germany.
October 09, 2019 -- The GSD, Ground Sample Distance (or resolution), is the key specification of any digital aerial photo mapping project. For a given camera and focal length, the GSD determines the altitude above ground AGL at which the aircraft must fly. Flying higher or lower changes the GSD and inherently produces images that do not meet the project's specifications. This limitation is now obsolete on all Lead'Air aerial cameras. Lead'Air is developing multi-focal lenses, which allows the planner to choose the mission altitude while preserving the required GSD. When circumstances (weather, ATC, etc.) require an altitude change, the survey aircraft crew can select a new altitude on the fly while maintaining the required GSD.
This system is based on commercially available variable focal lenses. The lenses are entirely re-engineered in Lead'Air's optical lab and converted to photogrammetric lenses, which are configured with different predetermined focal lengths. A Lead'Air multi-focal lens can have up to 20 preset focal lengths; each setting corresponds to a given altitude and GSD and is calibrated to true photogrammetric standards. The lenses are motorized and precisely controlled by the FMS system. On his screen, the operator chooses at which altitude he intends to...