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	Low-cost compact bar code sensor
	ZHANG, WENWEI
	2008-06-03
著作权人	HONEYWELL INTERNATIONAL INC.
专利号	US7380721
国家	美国
文献子类	授权发明
其他题名	Low-cost compact bar code sensor
英文摘要	A barcode sensor package has an optical emitter circuit and an optical detector circuit which are formed as one or more integrated optical circuits disposed in a housing which has a reading surface and one or more apertures located between the optical emitter and detector circuits. The optical emitter circuit has an emitter die, such as a vertical cavity surface emitting laser (VCSEL), for emitting a light beam and a diffraction optical element disposed on the emitter die for focusing the light beam to a bar code. The optical detector circuit has a photodetector die, such as a phototransistor, for detecting reflective light and another diffraction optical element disposed on the photodetector die for guiding light reflected from the bar code to the detector. The diffraction optical elements are fabricated by patterning optical layers, deposited on respective emitter and detector dies, using photolithograph or a direct write process.
公开日期	2008-06-03
申请日期	2006-08-22
状态	授权
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/49045]
专题	半导体激光器专利数据库
作者单位	HONEYWELL INTERNATIONAL INC.
推荐引用方式 GB/T 7714	ZHANG, WENWEI. Low-cost compact bar code sensor. US7380721. 2008-06-03.

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