The utility model provides a laser radar structure based on an array and a single optoelectronic device, which consists of a laser transmitting unit, a laser receiving unit and an optical system. The laser emitting unit consists of array LD and monomer LD, which are used to transmit laser beams with uneven angles in a vertical direction according to certain rules. The laser receiving unit contains the array APD and the monomer APD, which are used to match the laser transmitting unit and receive the optical signal reflected by the target to be detected. The optical system includes the optical lens group, which is used for collimating and shaping the laser emitted by the laser emission unit, and converges the light signal reflected by the target to the laser receiving unit. According to the application demand array LD can be placed in different regions in the vertical scanning field, so that the angle of the spot on the target is small and dense, and the precise scanning is realized. The single LD is distributed in the other regions of the vertical scanning field, so that the area of the area of the light spot which does not need the fine scanning is large and thus the whole sag is realized. A scan of a large field of view in a straight direction. The laser receiving unit contains the array APD and the monomer APD, which corresponds to the laser emission unit in the vertical scanning field area, and is used to receive the light signals reflected from the target object. The utility model relies on the array LD and the array APD to realize the local high resolution scanning of the vertical field of view; the scanning of the vertical large field of view is realized by using a single LD and a single APD.
【技术实现步骤摘要】
一种基于阵列及单体光电器件的激光雷达
本技术涉及激光雷达领域,尤其涉及一种基于阵列及单体光电器件的激光雷达结构。
技术介绍
目前,无人驾驶行业发展迅猛,而作为实现无人驾驶最重要的传感器——激光雷达的研发和应用也变得更加普及,且竞争激烈。目前,在售的激光雷达大都是各路扫描光斑均匀分布,间隔角度均匀相等或中间区域扫描精细,间隔角度小。在实际应用中,根据不同的应用场景和使用条件,我们需要对某一特定区域进行精细扫描,同时又要保证大视场范围的扫描,所以不同区域的光斑密集程度就会有所不同,激光光源之间的间隔就会依光斑密集程度的不同而有所不同。。现有的激光雷达都是采用单体LD作为激光光源,但单体LD排布方式终究是有封装及各路之间的光路调试距离等外部非有效尺寸,而激光雷达设备需要不断地小型化,这限制了其向更精细化、更高的垂直分辨率的方向发展,终归会遇到瓶颈。
技术实现思路
针对上述存在的问题,本技术提供了一种基于阵列及单体光电器件的激光雷达结构。相比于采用单体LD排布的方式,本技术的实现结构能够有效减小重点扫描区域光斑之间的间隔,即提高垂直分辨率。一种基于阵列及单体光电器件的激光雷达结构,包括:激光发射单元,所述激光发射单元包含至少一个阵列LD及n个单体LD,在阵列LD上方有x个单体LD,在阵列LD下方有n-x个单体LD,用于按照一定规律在垂直方向发射角度非均匀分布的激光光束;激光接收单元,所述激光接收单元包含至少一个阵列APD及m个单体APD,在阵列APD上方有y个单体APD,在阵列APD下方有m-y个单体APD,用于和激光发射单元相匹配,接收激光发射单元返回的光信号;优选 ...
【技术保护点】
1.一种基于阵列及单体光电器件的激光雷达,其特征在于,包括:激光发射单元,所述激光发射单元包含至少一个阵列LD及n个单体LD,在阵列LD上方有x个单体LD,在阵列LD下方有n‑x个单体LD,用于按照一定规律在垂直方向发射角度非均匀分布的激光光束;激光接收单元,所述激光接收单元包含至少一个阵列APD及m个单体APD,在阵列APD上方有y个单体APD,在阵列APD下方有m‑y个单体APD,用于和激光发射单元相匹配,接收激光发射单元返回的光信号。
【技术特征摘要】
1.一种基于阵列及单体光电器件的激光雷达,其特征在于,包括:激光发射单元,所述激光发射单元包含至少一个阵列LD及n个单体LD,在阵列LD上方有x个单体LD,在阵列LD下方有n-x个单体LD,用于按照一定规律在垂直方向发射角度非均匀分布的激光光束;激光接收单元,所述激光接收单元包含至少一个阵列APD及m个单体APD,在阵列APD上方有y个单体APD,在阵列APD下方有m-y个单体APD,用于和激光发射单元相匹配,接收激光发射单元返回的光信号。2.如权利要求1...
【专利技术属性】
技术研发人员:佟建,屈志巍,陈佳,张正正,李翔,徐洋,
申请(专利权)人:北京万集科技股份有限公司,
类型:新型
国别省市:北京,11
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