| 摘要 |
<p>A method of and means for measuring intensities of illumination over a light beam using a photometer (8) to measure light intensities of areas across the beam in which the light source (1) is at a defined distance from the photometer (8) and has mechanism to sweep the light source (1) across the photometer (8) progressively or incrementally at different angles of elevation or depression or by using an array of stacked photometers to record a series of points or graphs of the scan.</p> |
