噪声测量仪器（noise-measuring instrument）是噪声测量仪器种类很多，最基本、最常用的是声级计和频谱分析器。
目前有关晶体管低频噪声测量仪器普遍存在的问题是测量误差大、时间长、所给噪声参数不完善。
Nowdays the problems commonly existing in the measurement of low frequency noise of transistors are, great errors, long time and imperfection of noise parameters.
柱面散光轴位角进行手动测量，数码显示的数字化屈光度测量仪。本仪器采用特殊的处理电路，消除了外来噪声产生的误触发脉冲及输出错误积累而引起的位置偏移。
This instrument has a rotary encoding and raster and it has a special processing circuit not only eliminating trigger pulse case by noise but also clearing up position accumulates error.
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