本文件适用于设计用于医学实践的刚性内窥镜。不包括具有光纤或光电成像系统的内窥镜。它规定了一种测定内窥镜光学分辨率的试验方法。 本文件提供了一种测量方法，用于表征刚性内窥镜光学分辨率的三个方面。特征A用于提供内窥镜图像极限分辨率的简单测量。特征B提供低空间频率分辨率的测量，并表征内窥镜图像的清晰度或对比度。特性C提供了内窥镜图像的空间频率响应测量值。

This document applies to rigid endoscopes designed for use in the practice of medicine. Endoscopes having a fibre-optic or opto-electronic imaging system are excluded. It specifies a test method for determining the optical resolution of endoscopes. This document provides a measurement method for characterizing three aspects of the optical resolution of a rigid endoscope. Characteristic A is used to provide a simple measurement of the limiting resolution of the endoscope image. Characteristic B provides a measurement of low spatial frequency resolution and characterizes the sharpness, or contrast, of the endoscope image. Characteristic C provides a measurement of the spatial frequency response of the endoscope image.