Dynamic laser diode aperture for optical scanners
US5274491A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 1991 |
| Grant date | Dec 28, 1993 |
| Priority date | — |
| Expiry date | May 13, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S359/90
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A dynamic laser diode aperture for collimating light from a laser diode within an optical scanner which increases the power of the beam to a predetermined maximum. The optical scanner includes a motor having a hollow circular shaft through which the light passes. A lens member focuses the light, and the dynamic aperture, located within a cap member within an end of the motor shaft closest to the laser, collimates the focused light. The dynamic aperture approximates the shape of the unfocused light pattern from the laser diode. In the preferred embodiment, the dynamic aperture is generally rectangular in shape and rotates with the motor shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.