There are a number of applications of the photographic detector in astronomy which cannot be undertaken by an known photoeletric device . 在天文学中，照相探测器的许多应用不能用现有的光电器件来代替。
In photographic photometry we use photographic plates of a certain region of the sky to determine the coordinates of the stars . 在照相测光中，我们利用所拍摄的天空某一区域的照相底片来测定恒星的坐标。
The developed strips exhibit substantially identical photographic and physical properties with respect to speed, fog, contract and dmax . 显影后的胶片在速度、灰雾、反差和D最大方面基本表现出相同的照相性能和物理性能。
The discovery of photography in 1839 by daguerre(1789-1851)was chiefly responsible for early attempts to extend the gaussian theory . 1839年，达格雷（1789-1851）发现了照相术，当初推广高斯理论的一些尝试，主要有赖于这一发现。
Nowadays the light collected by the lens or mirror of a telescope is directed to a photographic plate rather than to the astronomer's eye . 被望远镜的透镜或反射镜所收集的光线，如今直接射到照相底板上，而不是天文学家的眼睛里。
