F4
Projection attachment
The projection tower has a diameter of 240mm, this
corresponding to a field of view number of 24.
Projection magnification = Objective magnification x 10x the
magnification in the relay
⚫ Lever position PRO
⚫ Lever position CAM/PRO (red dot)
⚫ Neutral-density filter switch black dot is visible
Automatic zoom lighting system/ indicator for objective
magnification
⚫ The automatic lighting system is located in the microscope
base and is used for the adjustment of the transmitted-light
illumination path for the particular objective. A fixed aperture is
imaged in the object plane, and the image of the diaphragm will
automatically adjust the field of view to 28. Together with the
lighting setup, this system achieves automatic Köhler illumination.
The light coming from the lamp is optimally utilized and the
conductance, i.e., the product of the field and aperture, is held
constant.
⚫ The power supply for the lighting system is produced with the
rotary switch of the power supply for the 100W low-voltage
halogen lamp (please refer to page D11)
⚫ When turning the objective turret, the position of the zoom is
automatically adjusted by a servo motor to the respective lens.
The control is programmed at the factory according to the
objective turret assembly. The knurled wheel in the base of the
microscope indicates the magnification of the powered-on
objective.
⚫ The zoom remains lit for all transmitted-light brightfield
methods
⚫ For transmitted-light darkfield, the automatic zoom is turned
off with the lever, and the handwheel rotated to the position of DF.
Summary of Contents for Univar
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