25
8.5.2 Setting the Aperture Iris Diaphragm
●
The aperture iris diaphragm determines the numerical aperture of the illumination system. It has an
effect of adjusting image resolution and contrast.
●
Since the contrast of microscope specimens is ordinarily low, setting the condenser aperture iris
diaphragm to between 70 and 80% of the NA of the objectives in use is usually recommended.
●
Remove one of the eyepieces, look into the eyepiece sleeve and adjust the aperture iris diaphragm
ring
until the image is about 70% of objective’s exit pupil.
●
You can use the condenser numerical aperture scale to adjust the aperture iris diaphragm.
Fig. 15
Fig. 16
Summary of Contents for PA53MET
Page 13: ...13 6 NOMENCLATURE...
Page 14: ...14...
Page 15: ...15 Control box and control pad are provided PA53MET 3D PA53MET BD 3D only...
Page 17: ...17...