发明名称 |
Bar code readers using surface emitting laser diode |
摘要 |
A scanning device incorporates a vertical cavity surface emitting laser (VCSEL). The laser diode may be mounted directly on an Si substrate which is adapted for movement to produce a scan pattern. A collimating lens may be directly mounted on the emitting surface of the laser. A plurality of lasers may be mounted on the substrate and operated in sequence without movement of the substrate to produce the effect of a scan. A single, variable-focal length lens is employed to focus each beam of the VCSEL at a different distance. The scanning device emits visible or invisible light towards a target such as a bar code and a detector (mounted on the same or an adjacent substrate) senses the light reflected by the target to produce data which is decoded for further processing. A VCSEL uses low current and emits light from a relatively large area so that a relatively large amount of light is emitted for relatively small heat generation.
|
申请公布号 |
US6543693(B1) |
申请公布日期 |
2003.04.08 |
申请号 |
US20000558374 |
申请日期 |
2000.04.26 |
申请人 |
SYMBOL TECHNOLOGIES, INC. |
发明人 |
STERN MIKLOS;GUREVICH VLADIMIR;KRICHEVER MARK |
分类号 |
G06K7/10;H01S5/183;H01S5/42;(IPC1-7):G06K7/10 |
主分类号 |
G06K7/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|