Optical measurement system incorporating ambient light component nullification

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	Optical measurement system incorporating ambient light component nullification
其他题名	Optical measurement system incorporating ambient light component nullification
	DAVIDOVIC, MILOS; ENNE, REINHARD; STEINLE, GUNTHER; GABERL, WOLFGANG
	2017-02-02
专利权人	AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE. LIMITED
公开日期	2017-02-02
授权国家	美国
专利类型	发明申请
摘要	An optical measurement system is provided for performing time-of-flight distance measurement with ambient light suppression. The system has a detector circuit that includes a photodetector and an additional current gain element that amplifies the photocurrent produced by the photodetector. Placement of the additional current gain element near the photodetector allows low-power optical signals to be detected without amplifying noise from sources of the system that are outside of the detector circuit, thereby allowing a high signal-to-noise ratio to be achieved. Embodiments of the system include circuitry that automatically regulates the bias voltage of the photodetector to compensate for temperature and for fabrication process variations.
其他摘要	提供一种光学测量系统，用于利用环境光抑制来执行飞行时间距离测量。该系统具有检测器电路，该检测器电路包括光电检测器和附加的电流增益元件，其放大由光电检测器产生的光电流。在光电探测器附近放置附加的电流增益元件允许检测低功率光信号而不放大来自系统的源的检测器电路之外的噪声，从而允许实现高信噪比。该系统的实施例包括自动调节光电检测器的偏置电压以补偿温度和制造工艺变化的电路。
主权项	An optical measurement system comprising: a first detector circuit comprising a combination of a photodetector and at least one gain element, the photodetector converting optical signals incident thereon into electrical signals, the gain element amplifying the electrical signals to produce amplified electrical signals; and first correlator and ambient light suppression circuitry electrically coupled with the first detector circuit and configured to receive a first amplified electrical signal from the first detector circuit relating to an amount of ambient light that is incident on the photodetector and to receive a second amplified electrical signal from the first detector circuit relating to the amount of ambient light that is incident on the photodetector and an amount of desired light reflected from a target object that is incident on the photodetector, the first correlator and ambient light suppression circuitry processing the first and second amplified electrical signals to produce a compensated electrical signal from which an effect of ambient light has been removed, the first correlator and ambient light suppression circuitry correlating the compensated signal with a reference signal to determine a distance of the optical measurement system from the target object.
申请日期	2016-04-29
专利号	US20170031009A1
专利状态	授权
申请号	US15/143266
公开（公告）号	US20170031009A1
IPC 分类号	G01S7/486 \| G01J1/42 \| G01S17/08
专利代理人	-
代理机构	-
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/62560
专题	半导体激光器专利数据库
作者单位	AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE. LIMITED
推荐引用方式 GB/T 7714	DAVIDOVIC, MILOS,ENNE, REINHARD,STEINLE, GUNTHER,et al. Optical measurement system incorporating ambient light component nullification. US20170031009A1[P]. 2017-02-02.