| 摘要 |
<p>Method and apparatus are disclosed which direct a preliminary pulse of radiation from a selectively energizable light source toward a subject, and a device for evaluating the amplitude of the reflected pulse of radiation therefrom so as to determine a weighted range signal as a function of the amplitude of generally non-visible radiation frequencies selected for reducing the non-uniformity in reflectivity values of reflected visible radiation in the scene, which weighted range signal includes a reflectivity factor and a range factor. The reflectivity factor, which detracts from the range factor for focusing, significantly enhances exposure control under certain scene fighting conditions.</p> |
