光路卡 基本测试和测量程序 第2-4部分：无输入/输出光纤的光路卡的光传输测试（1.0 版）

[中文适用范围]： IEC 62496的这一部分规定了使用光直接照射来决定光电路板是否通过的测试方法。输入端口被直接照明，并且使用区域图像传感器监控来自光学电路板的输出端口的光强度。过量光损失是根据来自待测样品和对照样品的总检测光强度计算得出的。该方法用于对面积大于核心区域的光电路板（OCB）的输入端口进行均匀照明@使用面图像传感器从OCB的相应输出端口获取区域图像的辐射亮度并进行评估使用与对照样品相比所获得的辐射度来判断是否通过。这种测试方法的优点是不需要发射光纤和 OCB 之间的对准过程。 [外文原描述]： IEC 62496-2-4:2013 specifies the test method to decide whether to pass or fail an optical circuit board using direct illumination by a light. The input ports are directly illuminated and the optical intensity from the output ports of the optical circuit board is monitored using an area image sensor. Excess optical losses are the calculated from total detected intensities of light from a sample to be measured and from a control sample. This method is used to illuminate uniformly the input port of the optical circuit board (OCB) with a larger area than the core area, obtain the radiance of an area image from the corresponding output port of the OCB using an area image sensor, and evaluate whether to pass or fail using the radiance obtained compared to that of a control sample. The advantage of this test method is that the alignment procedure between a launch fibre and the OCB is not necessary. Key words: test method to decide whether to pass or fail an optical circuit board, OCB, area image sensor