Laser pointer with selectable pointer patterns
US5450148A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Apr 18, 1994 |
| Grant date | Sep 12, 1995 |
| Priority date | — |
| Expiry date | Apr 18, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/20
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A laser pointer for projecting a laser beam with a selectable pointer pattern onto a projected screen during presentations comprising a shell body, a laser beam generating device, and a pointer pattern selector; the laser beam generating device is disposed in the front portion of the shell body and the pointer pattern selector is disposed in the rear portion of the shell body. The pointer pattern selector comprises a plurality of pointer patterns of varying geometric shapes and/or sizes, and the user can place one of the pointer patterns in the laser beam path using a rotational assembly or a horizontal shifting method so as to project a laser beam having the desired pointer pattern onto the projected screen. A magnifying lens is placed before each pointer pattern to enlarge the cross-sectional area of the laser beam to be projected through the selected pointer pattern. The magnifying lens can be in the form of a cylindrical lens so as to project a line-shaped pointer pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.