lens hood for cinematographic cameras
电影摄影机透镜遮光罩
The lens hood is used to cover up the lens.
遮光罩是用来遮盖镜头的。
Baffle Design and Stray Light Analysis of the Off-axis Three-mirror Telescope
离轴三反射望远镜遮光罩设计与杂光分析
Masking paper: Black or red opaque paper used for masks. For example: golderrod paper.
遮光纸:制遮罩用的不透光的黑色或红色纸.例如黄花纸.
A visor fastened about the head and used for protection against glare.
眼罩用带子固定在头上，用来遮住强光的护目镜
She had just mounted a distance lens on her camera, drawing it forward, and had adjusted the aperture and shutter speed.
她刚刚给照相机换上一个长镜头，带好遮光罩，调整了光圈和速度。
The causes of the front fog lamp shield blistering after surface treatment are studied by means of metalloscopy, scanning electronic microscope and energy spectrum analysis.
运用金相显微镜、描电镜和能谱仪,研究了前雾灯遮光罩表面处理后起泡的原因。
Again, masking options come in very handy here.
再次加了些有手绘效果的透明遮罩。
Program design of outer baffle vanes and improvement of conical inner baffle in R-C system
R-C系统外遮光罩挡光环的程序化设计及锥状内遮光罩的改进
Remember to take off the lens hood before you take a photo.
拍照前要记住先取下遮光罩。
The Stray Radiation Suppression and Baffle Design in Cassegrain Optical System
卡塞格伦光学系统的杂光抑制和遮光罩设计
Any of the lenses, prisms, or mirrors of an optical instrument.
光学镜光学仪器的透镜、棱镜或平面镜
Explanation: The center of our Milky Way Galaxy is hidden from the prying eyes of optical telescopes by clouds of obscuring dust and gas.
说明:在不透光尘埃与云气的遮掩下，我们银河系的中心在普通可见光望远镜中是难以看见的。
A planoconvex lens used to concentrate light.
凸透镜用来聚光的凸镜
The feature set includes nested transformations, clipping paths, alpha masks, filter effects, template objects and extensibility.
该特征设置包括嵌套的转换、辑路径、明遮罩、镜效果、版对象和扩展性。
She wore dark glasses to keep the glare off
她戴上深色眼镜，以遮强光。
My legions of terror will have helmets with clear plexiglass visors, not face-concealing ones.
我的军团将会配备耐热塑胶"透明"面罩头盔,而不是遮住面孔的头盔.
The lens or lens group closest to the eye in an optical instrument;an ocular.
目镜光学仪器中靠近眼睛的透镜或透镜组；窥孔