A digitized ruler with absolute code is adopted as the reference of the system, and the ruler is read by the reading system which is composed of optical system, CCD camera and computer.
该系统采用绝对码标尺做基准，使用由光学系统、CCD摄像机和计算机组成的读数系统来读取标尺数值。
Encoding system of absolute encoder generally USES natural binary code, Gray code, Gray-excess-code and so on.
绝对式编码器编码码制通常采用自然二进制码、格雷码、格雷余码等。
Such as the establishment of the safe absolute quantum code system, based on the quantum no-cloning theorem which forbids the quantum information be copied as the classical information.
又如，量子不可克隆定理使得量子信息不能像经典信息那样可以被任意复制，这使得人们能够建立起绝对安全的量子密码系统。
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