Borda Medical Technology Co. Ltd

Micro-photography (4) pharmaceutical research community
Field diaphragm in the lens block and that its role:
First, under the objective lens magnification for different diameters of the beam size
Second, in micro-photography plays a role in changes in image contrast.
When the light to expand to a certain extent, exposure to the specimens that will be reflected on the light scattering and irregular, resulting in the loss of image contrast.
When the field diaphragm contraction to the outside edge of the frame when the photographic image contrast will be improved.
If the field diaphragm contraction was too close to the frame, image corners will be cut out. Thus, depending on the field diaphragm should be slightly larger than the frame.
pharmaceutical social network aperture adjustment:
Installed in the condenser aperture diaphragm of the diaphragm is called. Its role is to make image resolution, contrast and focal depth in the best condition. Most of the specimens, such as the desired high-quality photos, aperture diaphragm to adjust the objective lens numerical aperture of 60% to 80%. Sopharma