Visuo-tactile sensors are optical sensors that utilize cameras to capture elastomer deformations, thereby generating high-resolution visuo-tactile images. With the increasing demand for touch, visuo-tactile data has been widely recognized in multimodal representation, three-dimensional reconstruction, and robotic manipulation.This book provides a comprehensive and unbiased introduction to visuo-tactile sensors including design, perception, and manipulation for Robots. It aims to offer technical insights for researchers interested in tactile dataset collection, multimodal representation, 3D reconstruction, and robotic manipulation.