Distance compensating deflected light beam pattern projector

Details Distance compensating deflected light beam pattern projector Distance compensating deflected light beam pattern projector

G - Physics

01

B

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G01B 9/00 (2006.01) E21D 9/00 (2006.01) G01C 7/06 (2006.01) G01C 15/00 (2006.01)

Patent

CA 1138190

Abstract of the Disclosure: A method in rock blasting operations for marking out drill holes when drifting tunnels while making use of a direction reference beam which is projected in a di- rection in accordance with a predetermined lay out, at least part of said reference beam being passed to a scan- ning means by means of which said part-beam in accordance with a predetermined drill hole pattern is directed onto the rock to present thereon images of the beam at locations of intended drill holes on the rock surface. Correspond- ingly, a device for executing said method comprises means for deflecting at least part of a reference light beam onto locations for holes to be drilled in accordance with a predetermined pattern onto the rock wall.

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