dark field

• 暗区,暗视场,暗场

dark field的用法和样例：

例句

1. For astrometric purposes, dark frame and flat field calibration is recommended.
   出于天文测量要求，暗场图和平场图校准是被推荐的。
2. The annular lens dark field vertical illumination system has been more and more applied in special microscopes.
   环形透镜暗场落射照明系统越来越多被应用在特型显微镜上。
3. The spirals are not readily seen unless immunofluorescent stain or dark field illumination is employed.
   螺旋体不易观察除非在荧光显微镜或暗视野显微镜观察。