• 1. Focimeters: 焦度计 | 焦距计
• 2. Verification Regulation of Focimeters: 焦度计检定规程

• 1.This paper describes the error in focimeters, the principle of selection on curvature of inside face for vertex power of standard lenses and the method for measuring them.
  本文叙述了焦度计的误差，顶焦度标准镜片内表面弯度的选择原则，以及标准镜片的测量方法等。
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