Patent ID: 7508587

Claim:
A laser level, comprising: at least two optical systems which are parallel to and oppositely adjoin to each other in a same plane, the optical system comprising: a laser light source for emitting a laser beam; a regular lens adjacent to the laser light source and disposed along an emission direction of the laser beam from the laser light source; a diffusion lens adjacent to the regular lens and disposed along the emission direction of the laser beam from the regular lens; a beam-splitting element adjacent to the diffusion lens and disposed along the emission direction of the laser beam from the diffusion lens, wherein the diffusion lens diffuses the laser beam from the regular lens to the beam-splitting element to be diffused and split into fan-shaped light beam in the same plane; and an outer casing having a chamber to stably contain the laser light source, the regular lens, the diffusion lens and the beam-splitting element.