遮光罩

为什么不给所有的镜头都配上遮光罩呢？

Why aren 't all lenses supplied with a lens hood ?

星敏感器中遮光罩设计及结果模拟

Design of Lens Hood for Star Sensor and Result Simulation

夏天如果不用遮光罩的话，暖房会变得特别热。

The conservatory will get very hot in summer unless shading is used .

在镜头和CCD部件之间通过可伸缩的遮光罩相连接。

The lens can be connected with the CCD part by a retractable shading cover .

R-C系统遮光罩的最优化设计

The optimum design of the baffle of R-C system

在CCD星敏感器中，CCD像面的背景噪声严重地影响了星点提取的准确性，要降低背景噪声就必须对杂光进行有效地消除，所以CCD星敏感器中的遮光罩起着重要的作用。

With the gradual development of CCD star sensor , exactly extracting star point has been becoming more and more important . The background noise of CCD will affect the extracting accuracy seriously .

针对R-C系统的特点，考虑轴外渐晕的影响，推导出主、次镜内遮光罩尺寸设计的约束公式。

The constraint formulas for designing the geometries of primary baffle and secondary baffle are deduced when taking account of vignette of 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

The lens hood is used to cover up the lens . Program design of outer baffle vanes and improvement of conical inner baffle in R-C system

通过对比测试，证实了锥状遮光罩对R-C光学系统视场外杂光抑制有良好效果。

After comparison test , the cone baffle benefiting for suppressing of stray light out of field source in an R - C optical system was verified .

测试遮光罩开孔尺寸大小对背反射有较大的影响，背反射对DSSC的短路电流密度的增加率的影响随着测试遮光罩开孔尺寸的增加而增加。

The size of test hole have greater impact on back-reflection , the influence of back-reflection on the short-circuit current density of the DSSC increase as the size of the test hole increase .

离轴三反射望远镜遮光罩设计与杂光分析

Baffle Design and Stray Light Analysis of the Off-axis Three-mirror Telescope

成头兜、罩或类似覆盖物状的遮光罩是用来遮盖镜头的。

Shaped like a hood , cowl , or similar covering .

有可能有一个以上的遮光罩。

It is possible to have more than one hood .

阳光直射对外遮光罩辐射加热的分析与计算

Solar Radiation Analysis and Calculation to Outer Baffle of Optical Remote Sensor

星载光学系统遮光罩消杂光结构优化设计方法

An optimum design method for the light hade of spaceborne optical system

生产遮光罩，手腕带，厂家直销！

Production hood , wrist band , factory direct !

星敏感器遮光罩的优化设计

Optimum Designing of Baffle of CCD - star Sensor

拍照前要记住先取下遮光罩。

Remember to take off the lens hood before you take a photo .

并且设计了主镜和次镜遮光罩，有效消除了光机系统的一次杂光。

Eliminate the main stray light by design the primary and secondary mirror hood .

通过合理地设置外遮光罩可以有效地抑制杂散光。

Through properly setting the outer baffle , the stray light could be effectively restrained .

我热衷于对焦杆和大的附加遮光罩。

I am a fan of both the focusing lever and the larger attachable hood .

在欧洲，希腊人是使用伞的一个作为遮光罩。

In Europe , the Greeks were the first to use the umbrella as a sunshade .

在消杂结构中，为了减少内部辐射，遮光罩内部使用反射式挡光环。

In order to reduce the internalradiation , reflective vanes are used in the baffle interior .

我们知道伞用于古老埃及和巴比伦作为遮光罩。

We know that the umbrella was used in ancient Egypt and Babylon as a sunshade .

烟囱罩烟囱的挡风屏遮光罩是用来遮盖镜头的。

A windscreen for a chimney . The lens hood is used to cover up the lens .

电影摄影机透镜遮光罩

Lens hood for cinematographic cameras

卡塞格伦光学系统的杂光抑制和遮光罩设计卡塞格伦望远镜系统杂散光分析

The Stray Radiation Suppression and Baffle Design in Cassegrain Optical System Analysis for Stray Light of a Cassegrain Telescope

文章介绍了空间遥感相机遮光罩的结构特点及其功能。

In this paper , the structure and function of baffle that designed for space remote sensing camera are investigated .

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。

She had just mounted a distance lens on her camera , drawing it forward , and had adjusted the aperture and shutter speed .

一般专业摄影师会用在阳光和被摄主体之间加一个遮光罩来得到柔化的效果。

One way pro 's do this is to use a giant silkscreen in between the sun and the subject to get a softer effect .