机械补偿 (mechanical compensation)指的是变焦镜头变动焦距时，变倍镜组和补偿镜组的移动量和移动方向，
介绍了采用机械补偿方式的变焦距镜头模块化设计方法。
A modularized design method for a zoom lens with mechanical compensation is presented.
采用机械补偿的方法，可以保证凸轮的准确性以使像面稳定，从而保证成像质量。
Mechanical compensation can ensure the accuracy of the cam, accomplish the image plane stabilization and keep the imaging quality.
通过比较机械补偿法和光学补偿法两种无热化补偿技术，可以看出光学补偿法具有明显的优点。
By comparing the two athermal techniques of mechanical compensation and optical compensation, we can see the last one has obvious advantage over the former.
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