| 摘要 |
<p>PURPOSE:To permit photometry of spot and entire surface easily by providing a transparent photodetector on the front surface of a film or on an angular rotating mirror. CONSTITUTION:An object image is formed on a focal plane 3' of focal glass 3 (hence film plane) with a mirror 2 by adjusting a lens group 1. Thence, the optical path is bent by a pentagonal prism 5 past a capacitor 4 and the focus of mirror- reflected light B is made easy to see by a magnifier 6. Here, a transparent photodetector substrate 8 mounted with a transparent photodetector 8' is placed on the front surface of the film, and direct photodetection and measurement are carried out on this surface, whereby necessary command is accomplished. With such constitution, the photometry of spot and entire surface is performed by the simple mechanism. Hence, accurate photographing is performed.</p> |
