Lenses for 3D Time of Flight (ToF) Image Sensors（眼镜的3 d飞行时间(ToF)图像传感器）.pdfVIP

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Lenses for 3D Time of Flight (ToF) Image Sensors（眼镜的3 d飞行时间(ToF)图像传感器）.pdf

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Lenses for 3D Time of Flight (ToF) Image Sensors（眼镜的3 d飞行时间(ToF)图像传感器）

Application Report SBAA217– July 2016 Lenses for 3D Time-of-Flight (ToF) Image Sensors Subhash Chandra Sadhu ABSTRACT In a camera, the lens ensures that light coming from a given point in a scene reaches a given pixel. When an ideal lens is in perfect focus, light coming from a given point in the image will reach a given pixel only. This is an important optical component which enables cameras, including 3D time-of-flight (ToF) cameras, to work. 3D ToF cameras have certain distinct characteristics which have special requirements to be met with while selecting or designing the lenses. This document explains how to decide the specifications for 3D ToF cameras. It also describes how to choose or design lens holders. Contents 1 Background 1 2 Lens 3 3 Lens Holder 5 4 Summary 6 List of Figures 1 OPT8241 Pixel Area 5 2 Lens Holder 6 List of Tables 1 Lens Specifications 3 1 Background Detailed information on 3D ToF cameras is given in Time-of-Flight Camera – An Introduction (SLOA190). This document describes the specifics which set the 3D camera optics requirements distinct from conventional cameras. A 3D ToF camera works on active lighting only. It cannot get any depth signal from the ambient light. So it is important that the