主题：请问电子显微镜对CCD有没有什么特殊要求?

使用黑白的不失真，精确度应该要高一些，但是其清晰度不及彩色，不利于辨别。百万想素一般来说可以了。（楼主可以再问问别人，我知道的也不是太清楚，仅为参考）。

客气客气啦!先行谢过!我司杭州伊士曼科技有限公司是做数字摄像仪的,以前都是在为医疗器械行业服务,现在想转一下行业,可是茫茫商海,难啊!还望在这方面有见识的大虾帮助指点一二,小妹不胜感激!

电镜上用的CCD要求也不高，一般使用PAL制式的TV信号，主要是观察样品室的情况及样品的位置，防止碰撞。CCD的选用主要是与电镜的配合问题，安装上要与电镜样品室的接口相匹配，信号及电源的连接要与电镜电路匹配，且电镜具有接收、显示TV信号的功能。
对了，样品室里是黑暗的，要求CCD具有红外照明功能。而且只能用黑白的。

介绍一款CCD，可惜附图不好插入，供参考吧。

1.    General
The INFRARED MINISCOPE uses a small CCD television camera to provide a clear view of the specimen region in the SEM chamber.  The view includes all nearby detectors, the specimen and the microscope's lens.
Its use will help to prevent expensive collisions within the vacuum chamber.
The MINISCOPE fits the central port on the LEO 1530 chamber.  It uses
Infrared illumination, which is invisible to the SE detector.  However, it is not possible to select both simultaneously.
Certain detectors such as EDX, Cathodoluminescence and Solid State Backscatter may be affected by infrared and when these are in use, it may be necessary to reduce or completely extinguish the IR illumination.
The INFRARED MINISCOPE is built as a single unit with camera, illuminators
and vacuum feed-through.  The feed-through is fully X-Ray shielded for safety.
Note that the SEM should not be operated with the MINISCOPE cover plate removed.

2.    Installation
Remove the cover from the port in the centre of the Stage door.
Replace it with the MINISCOPE.  It is fitted with the illuminators placed above the camera lens (as shown in Diagram 1 above).

Ensure that the O-Ring groove, the surface of the Stage Front Plate, and the O-Ring are clean and free from dust.
Feed the Cables through the Cable Clamp in the Plinth, ensuring that the exposed braids in the cables are clamped to maintain correct earthing. (See Diag.2)
Connect the cables to the SEM. (See Diag.2).  The  9 Way ‘D’ should be fitted to the cut-out in the Plinth Connection Panel designated ‘CCD SUPPLY’
The BNC should be fitted to the cut-out in the Plinth Connection Panel designated

Any Cables already fitted to these specific locations on the Plinth Connection Panel should be discarded.

3.         Operation
Place a specimen in position centred on the lens and adjust the focus on the specimen by screwing the lens in or out as required. The focus with IR light will be different to that in visual light, so final adjustments are best made with the room dark and the IR illumination turned on. 
When the focus is correctly set, close the chamber door.
The lens and detectors should now be clearly seen.  If necessary, adjust the focus for greater clarity.
The INFRARED MINISCOPE is now ready for service.  For best illuminator lifetime, we recommend that it is not used continuously at the highest setting.  Normally a setting of around 50% will be adequate. The Contrast should be adjusted to suit.

The Mini-scope can be selected from the Detectors Menu, and when selected illumination is controlled by the BRIGHTNESS parameter.
When the Mini-scope is de-selected as the Detector the illumination is automatically switched off.

电镜上CCD的应用一般分两种，扫描电镜用于样品室观察，像素要求不高，刷新率有个10几桢就可以了；透射电镜用于成像，对像素要求较高，

没用过扫描的ccd，透射的ccd一般来说1024×1024足够了。大了当然好，但透射电镜的分辨率最好高一些，否则也意义不大。