we inscribed surface relief grating on the thin films using point-by-point method and amplitude mask method (the amplitude mask was taken place by grating roll film manufactured by ourselves).
利用逐点写入法和振幅掩模法(振幅掩模板为自制光栅胶片)在这种薄膜上刻写了表面形貌光栅。
i picked some pictures today, by roll film then.
今天整理出一部分照片,那时都是用胶卷拍的。
the invention of roll film greatly speeded up the process of recording multiple images.
这项胶卷的发明极大的推动了可记录的多重画面技术的进程。
however, the first roll film for domestic use was also launched in world expo.
第一卷民用胶卷在世博会上亮相的。
plate projection system: a plat exposure system which works by projecting the image from microfilm or compact roll film rather than by the same-size one-to-one contact printing of films.