本手册介绍了接触式和非接触式（以前是电刷和无刷）轴位置、模数编码器的操作。它包含编码器的物理描述和说明、使用的技术、操作理论、二进制码的背景信息、编码原理和限制、编码器术语的定义以及选择编码器的其他标准，包括军用编码器的识别和标记。

This handbook describes the operation of contact and non-contact (formerly brush and brushless) shaft-position, analog-to-digital encoders. It contains physical descriptions and illustrations of encoders, techniques used, theory of operation, background information on binary codes, coding principles and limitation, definitions of encoder terminology, and other criteria for selecting an encoder including identification and marking of encoders for military use.