本IES文件的目的是描述测定某些灯具和灯具发光强度分布的测量程序，使用数码相机将灯具的投影光分布捕捉到屏幕上。要实现精确的数字测光，需要考虑许多因素；本报告阐述了其中最重要的因素。由于这是一项相对较新的技术，因此提供了相当多的细节，以帮助读者理解所涉及的原则、要求和限制。 本文档介绍了采用CCD阵列的数码相机的使用。本节涵盖了这种光测量形式的精度要求和特殊条件。描述了硬件选择和软件开发需要考虑的众多因素。规定了校准要求，以及数据简化技术。

The intent of this IES document is to describe measurement procedures for the determination of the luminous intensity distribution of certain lamps and luminaires, using a digital camera to capture the projected light distribution from a luminaire onto a screen. Many factors need to be taken into account to achieve accurate digital photometry; this report addresses the most significant of these factors. Because this is a relatively new technique, considerable detail is provided to assist the reader in understanding the principles, requirements, and limitations involved. This document addresses the use of digital cameras incorporating a CCD array. Requirements for accuracy and the special conditions for this form of light measurement are covered. The numerous factors to be taken into account for hardware selection and software development are described. Calibration requirements are specified, as are data reduction techniques.