Projector level

Details Projector level Projector level

G - Physics

01

C

G01C 9/00 (2006.01) G01C 15/00 (2006.01)

Patent

CA 2251515

This projector level is composed of a bottom plate, a main structure above the bottom plate, a lid on the main structure, a connection plate over the lid, a main structure internal base block hanging freely from the lid with a perpendicular bi-axial universal coupling, a group of laser ray producers situated on the base block, and a battery case holding the battery that supplies power to the laser producers. On the base block, there is a semitransparent projection lens. In front of the semitransparent projection lens , there is an expansion lens. Parallel laser rays go through, and are reflected by, the projection lens. Those rays going through the projection lens proceed through the expansion lens to form a vertical or horizontal line on a surface in front of the projector. Those rays reflected by the projection lens form two opposite dots, one above the projector level and the other below the projector level. These two dots form a plumb line. Several similar projector levels can be used together, with one situated on the top of the other, and so on. The angles of multiple lines from several projector levels can be adjusted and can be based on the same reference coordinate, which is convenient for construction purposes.

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