The purpose of the paper is to present a new laser diode range finding method. The system belongs to the category of flight time measurement. The optical power of the laser diode beam is modulated and then both emitted and returned signals are compared in order to obtain the delay or distance information. The new method is an estimation of the distance by correlation computation. The main advan...

Laser rangefinders and laser scanners are widely used for industrial purposes and for remote sensing. In agriculture information about crop parameters like volume, height, and density can support the optimisation of production processes. In scientific papers the measurement of these parameters by low cost laser rangefinders with one echo has been presented for short ranges. Because the cross se...

This report provides a informal survey of laser distance measurement. Applications of laser range finding are briefly discussed and various techniques for laser ranging such as active laser triangulation, pulsed time-of-flight (TOF), phase shift, FMCW, and correlation are described.

Abstract The Satellite Laser Ranging (SLR) technique provides very accurate distance measurements to artificial Earth satellites. SLR is employed for the realization of origin and scale terrestrial reference frame. Despite high precision, observations can be affected by various systematic errors. So far, range biases were used account measurement errors mismodeling effects in SLR. Range are con...

This paper presents the integration of an InGaAs avalanche photodiode (APD)with first amplification stage, comprised a low capacitance silicon N-channel dual-gate MOS-FET and associated passive components, in APD case. combined linear mode optical hybrid detector is used field terrestrial laser range finding. In this case, reduction input by 0.7 pF improvement signal-to-noise ratio (SNR) at low...

A common challenge in developing small-satellite-based Earth-observation (EO) missions is getting the data to the ground. Typically, most satellites download data via space-to-ground radio-frequency (RF) links, communicating directly with fixed ground stations as the satellites fly within range. For many next-generation EO missions, such as hyperspectral imaging or SAR missions, the volume of d...

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