Size-adjustable elliptical laser marker
US9507157B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Dec 17, 2014 |
| Grant date | Nov 29, 2016 |
| Priority date | — |
| Expiry date | Jul 30, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/0883
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A laser marker/pointer for projecting size-adjustable circular or elliptical laser beam patterns onto a target surface such as a portion of a presentation screen or to assist in the aiming of a firearm, comprises a handheld shell body in which is mounted a laser light source, a rotating wedge prism driven by an electric motor through a belt pulley or a gear system, two convex lenses, a DC power unit, and a mechanical and electric control unit. The rotating wedge prism is placed between the two convex lenses to refract the laser beam into an opening-angle adjustable hollow light cone. The projection of the hollow light cone onto a target surface generates circular or elliptical tracing patterns. The mechanical and electric control unit controls the laser pattern generation and its size adjustment through driving the wedge prism rotation around the emitted laser beam direction and its linear movement along the beam direction. The position of the wedge prism along the original emitted laser direction determines the size of the circular or elliptical pattern. A push button switch controlling the power on and off of the device can be slid in two directions to either enlarge or reduce th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.