Patent ID: 9507157
Filing Date: 2016-11-29
CPC Classification: G02B

Claim Text:
1. A laser beam marker for projecting a size-adjustable circular or elliptical pattern onto a receiving surface comprising: a housing having a frontmost aperture; a DC source of power supply in said housing; a laser beam generating device mounted in said housing; a pair of convex lenses mounted in said housing; a wedge prism placed between the pair of convex lenses; and a mechanical and electronic control unit to drive the rotational movement of the wedge prism around the emitted laser beam direction and its linear movement along the laser beam direction, wherein the control unit contains a wedge prism mounting frame that enables the wedge prism to be rotated by a belt pulley or a gear mechanism, an electric motor with a rotating shaft, two lens holding frames, a pair of rods affixed to the two lens holding frames that permits the wedge prism mounting frame to be linearly slid along the pair of rods, and an electric switch for connecting the DC source of power supply with the electric motor and the laser beam generating device.