关键词: 激光, 罗盘仪, 森林勘测

Abstract: A new measuring tool is developed by appling laser technique for forest survey, which has three main functions i. e. visible light direction guidan-ce, measuring distance and horizontal distance measuring by slope measuring.This compass is consisted of two parts, a projecting system and a receivingsystem. The red laser beam is shot from the projecting system, which canset up the visible direction line of fixed position in the forest surroundings,and then the operators can fell trees along the direction. The laser beam isseparated into two beams by a semi-wedge lens, there is a fixed angle bet-ween the two beams, the actual value of measured distance will be showndirectly on the receiving pole. The reading will be the value of a inclinedistance when the receiving pole is vertical to the horizontal plane, and thevalue of horizontal distance when it is vertical to the slope plane. From nowon, the horizontal distance of a slope plane can be obtained directly withoutany conversion of incline distance sin he receiving pole can be vertical to incline plane with the help of lens hood and orientation device.

Key words: Laser, Compass, Forest servey