A CCD PHOTOMETER FOR LIGHTING RESEARCH AND DESIGN

摘要

This paper firstly describes the photometric calibration of a CCD luminance meter based on procedures appeared in technical literature; this allows the set up of a CCD photometer equipment. The basic hardware consists of a B/W CCD camera, with a photopic correction filter, connected to a "frame grabber" board of a computer; the digitised camera image is then converted, by means of an analysis algorithm, to a luminance map. A case study of CCD photometer application was then performed using a software tool specifically developed to evaluate indoor lighting level. The luminance map of a diffuse light source was used as "input" data for the software developed, and the "output" data, i.e. illumination levels, were then compared with measured values.