System for operating one or more suspended laser projectors to project a temporary visible image onto a surface

An apparatus for providing a temporary visible image upon a target surface, comprising:

• a plurality of lasers each operative to emit optical energy at a wavelength of between 380 and 750 nm;
• first and second projection modules optically coupled to said plurality of lasers, said first projection module being adapted to project optical energy received from said plurality of lasers downwardly onto the target surface;
• a controller responsive to input user commands to operate, in accordance with a first mode of operation, the first projection module and at least one of said plurality of lasers to project a straight, visible reference line upon the target surface and to operate, in accordance with a second mode of operation, the first and second projection modules and said plurality of lasers to project a temporary, visible, multicolored image upon the target surface;
• and a suspension system for supporting said first projection module at an elevated location above the target surface and for conveying said first projection module in response to user input commands, said suspension system including a position stabilization system adapted to detect and correct angular deviations relative to a desired orientation of the first projection module,
• wherein said plurality of lasers are operative to emit a sufficient amount of optical energy such that the reference line projected by said first projection module is visible during daylight ambient lighting conditions, and
• wherein each of said first and second projection modules includes a corresponding X-Y scanning assembly operative to project optical energy along selectable paths upon the target surface,
• whereby said first projection module may be conveyed from a first, position-stabilized location from which the reference line can be projected upon a first region of the target surface to a second, position-stabilized location from which the reference line can be projected upon a second region of the target surface.