| 释义 |
photographometer|ˌfəʊtəgrəˈfɒmɪtə(r)|
[f. as photograph + -ometer, -meter.]
1. An instrument for ascertaining the degree of sensitiveness of photographic films to the chemical action of light; an actinometer.
1849Art Jrnl. 96 With the photographometer of Mr. Claudet this is easily ascertained. 1853R. Hunt Man. Photogr. 149 M. Claudet turned his attention to contrive an apparatus by which he could test at the same time the sensitiveness of the daguerreotype plate and the intensity of light. This instrument he called a Photographometer.
2. A photographic apparatus for automatically recording the angular position of objects around a given point.
1884Knight Dict. Mech. Suppl. 673/2. |