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Long Range 3D Imaging with a 32x32 Geiger Mode InGaAs/InP Camera
This paper reports the performance of a long range 3D imaging system operating at a wavelength of 1550nm incorporating a Geiger mode 32x32 array InGaAs/InP camera. A cross-correlation technique were used to mitigate range aliasing and therefore enable the measurement of the absolute range to single or multiple surfaces within the instantaneous field of view of each pixel in the 2D array. The system uses a fibre amplified laser source operating at an average pulse repetition rate of 125kHz with pulse energies of 2.4μJ per pulse. Measurements of the absolute range to remote manmade Lambertian surfaces and foliage at ranges up to 10km with range accuracy of better than 4cm are reported. The simultaneous imaging and measurement of the absolute range of two remote manmade Lambertian surfaces separated by >1km is also presented.
Hiskett Philip, Gordon Karen, Copley Jeremy, Lamb Robert
Paper for Seminar/Symposium/Conference
Proceedings SPIE, "Advanced Photon Counting Techniques" (28 May 2014)
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