MET 400
Illuminator
The Illuminator Unit is to be fixed to the main Microscope Body with 3 screws using Allen wrench supplied along with
Illuminator. Three Tapped Holes are provided in the Base Unit as shown in Diagram below.
Important Note:
Make sure the Power Cord is not connected at this stage.
After the Illuminator Assembly is properly fixed, connect the cable from Lamp House to the Socket provided in Base of
Microscope as shown in below picture.
Adjusting the Aperture Diaphragm
In order to achieve good resolution of the optical image, the contrast and depth of focus it is necessary to control the numerical
aperture of the Illumination system through the lever provided on the illuminator - See Diagram above.
1.
Place a specimen with plain surface on the stage.
2.
Focus on the specimen with 10x Objective.
3.
Remove one of the Eyepiece & look through the Eyepiece Tube to ensure the diaphragm image is visible in the
pupil of the Objective
4.
It is recommended to keep the Aperture Diaphragm image in nearly 3/4th of the pupil of Objective. Adjust with
aperture lever your required image quality.
Reducing the aperture increases the contrast & the depth of focus. Increasing the aperture increases the brightness &
resolution.
Installing the Incidental Light Illuminator
5
Aperture Diaphragm lever
EPI Illuinator Cable
connecting to above
3 tapped holes
5
Fig. 3