公开(公告)号：US09459352B2

公开(公告)日：2016-10-04

申请号：US14549000

申请日：2014-11-20

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： James H. Becker ,  Tony R. Larson ,  Dimitar T. Trifonov ,  Zhongyan Sheng

IPC: G01S17/32 ,  G01S17/02 ,  G01S7/481

CPC classification number: G01S17/32 ,  G01S7/4813 ,  G01S7/4814 ,  G01S7/4816 ,  G01S7/497 ,  G01S17/026 ,  G01S17/48

Abstract: An apparatus includes a light source to generate source light through an optically transmissive medium to an object. A receiver includes a near zone light sensor and a far zone light sensor positioned on a substrate with the light source. The near zone light sensor is positioned on the substrate to, in response to the generated source light, receive reflected source light from the object and the optically transmissive medium. The far zone light sensor is positioned on the substrate to, in response to the source light, receive the reflected source light from the object and to receive a reduced quantity of the reflected source light from the optically transmissive medium compared to the near zone light sensor.

Abstract translation: 一种装置包括用于通过光学透射介质产生源光的物体的光源。 接收机包括近区光传感器和位于具有光源的基板上的远区光传感器。 近区光传感器位于基板上，以响应于所产生的源光，从物体和透光介质接收反射光源。 远区光传感器位于基板上，以响应于源光，从物体接收反射的源光，并且与近区光传感器相比，从光透射介质接收少量的反射源光 。