ZEISS
3 Product and Functional Description | 3.3 Detectors
Parameter
Description
Aperture
30 μm
The standard aperture is recommended for many applications
20 μm
Recommended for high magnification and high resolution imaging
750 μm
For VP/EP mode only
Specimen tilt
Tilting the specimen towards the detector increases collection effi-
ciency
Operation mode
Only suitable in high vacuum
3.3.4 Chamber CCD Camera
Purpose
The microscope contains a CCD camera (charge-coupled device camera) inside the specimen
chamber. It is referred to as the chamber CCD camera or chamberscope. It allows you to monitor
the position of the specimen stage and particularly the distance between the objective lens and
the specimen holder.
Position
The default location of the chamber CCD camera is at the front of the specimen chamber. Other
positions are available optionally.
1
2
Fig. 22: Sample image from chamber
camera.
1
Objective lens
2
Specimen holder
NOTICE
Risk of collision
Use the chamber CCD camera to monitor the position of the specimen holder during stage
movements. Pay particular attention to the distance between the objective lens and the top of
the specimen. This applies to vertical movements, but also to horizontal movements, because a
thick specimen may collide with the objective lens from the side.
Function
The chamber CCD camera has two illumination modes. The chamber can be illuminated either
with white light or with infrared light. Infrared light gives a grayscale image, whereas white light
gives a color image. In standard settings the mode is automatically selected, depending on the
imaging mode and the selected detectors. White light limits the performance of most detectors.
Therefore infrared illumination is a fallback if white light cannot be used. The performance of
diode detectors is negatively affected by infrared light. If a diode detector is selected, then by de-
fault the chamber CCD camera is disabled. The automatic selection of the illumination mode can
be manually overwritten by the user.
Instruction Manual ZEISS EVO | en-US | Rev. 10 | 354706-0780-006
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Содержание EVO
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