近年行動及自動裝置要求較高精度的環境識別及定位，傳統的二維影像偵測方式不符需求，需要利用三維量測得到較高的精度及準確度，在各種三維量測技術中，非接觸式的光學量測是最常應用技術，在光學量測技術中，結構光量測三維資訊在成本、資料穩健性及精度上較適合一般行動裝置，近年來在許多消費性產品採用，本文先介紹幾種常用光學立體量測技術，然後說明結構光成像的原理，及影響結構光成像效率與精度的編碼技術，供讀者瞭解結構光成像的關鍵技術。

Mobile and automatic devices inspire the demand of high-precision positioning and object recognition. Traditional 2D image detection cannot satisfy the demand of accuracy, and measurement turns to 3D imaging to fulfi l the requirement. Structured light reconstruction method is one of the most adopted method in many optical 3D measurement techniques. Due to its acceptable cost, robustness, and data accuracy, structured Light method has been applied in many mobile consumer products. In this article, we briefl y introduce some general methods of optical 3D measurement, then explain the principle of structured light imaging, and the coding technology that affects the effi ciency and accuracy of structural light imaging.