本标准规定了用于确定35mm行星相机复印机照明均匀性的最小测试目标元件及其标准。建立了测试目标的布局和从行星相机获得均匀密度缩微胶片图像的程序，以帮助获得高质量的第一代工程图纸银明胶缩微胶片。

This standard specifies the minimum test target elements and their criteria to be used in determining the uniformity of illumination on the copyboard of a 35mm planetary camera. The layout of the test target and the procedure to obtain a uniform density of microfilm images from a planetary camera are established to assist in the achievement of high-quality, first-generation silver-gelatin microfilm of engineering drawings.