发明名称 Laser power control arrangements in electro-optical readers
摘要 Laser power control arrangements interrupt power to a laser used in electro-optical readers upon detection of an over-power condition not conforming to preestablished regulatory standards. In one embodiment, during an operational mode, a difference between laser drive currents at two operating points is compared to a difference between laser drive currents at the same two operating points during a calibration mode. The over-power condition is recognized when the difference during the operational mode exceeds the difference during the calibration mode by a predetermined amount. In another embodiment, the laser is only energized to emit the beam at a reduced power level well below regulatory standards for staring at even if a motor drive failed.
申请公布号 US7609736(B2) 申请公布日期 2009.10.27
申请号 US20050239745 申请日期 2005.09.30
申请人 SYMBOL TECHNOLOGIES, INC. 发明人 DIFAZIO COSTANZO;GUREVICH VLADIMIR;GIEBEL JAMES;SCHNEIDER GARY G.;BLASCZAK MATTHEW;WEITZNER MARK A.;BARKAN EDWARD
分类号 H01S3/00 主分类号 H01S3/00
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