Patent ID: 7184131
Filing Date: 2007-02-27
Classification: G01C,G01S

Abstract:
1. A multifunction rangefinder, comprising: a power supply; a distance measurement unit capable of short and long distance measurements, coupled to the power supply to transmit a light beam to a target, receive reflected light from the target, and output a distance measurement signal; a compass measurement unit coupled to the power supply to measure terrestrial magnetism, generating a compass measurement signal; an altitude measurement unit coupled to the power supply to measure atmospheric pressure, generating an altitude measurement signal; a microprocessor calculating a distance between the target and the distance measurement unit and altitude according to the distance measurement signal and the altitude measurement signal respectively, and determining the direction to of the target according to the compass measurement signal; and a display unit coupled to the microprocessor to display the calculated distance between the target and the distance measurement unit, the calculated altitude and the determined direction to of the target, wherein the distance measurement unit comprises: