3
Optika
stereo-microscope
LAB-1 / LAB-2
Alignment and operation
Interpupillary distance
Move the two eyepiece tubes until only one circular field can be seen through the two eyepieces. lf two
circles appear the interpupillary distance is too big, and f 2 overlapped circles appear the interpupillary
distance is too small.
Focusing the microscope
Try to focus the sample at the highest magnification with the focusing knob. lf it cannot be done, adjust the
height of the microscope along the vertical post Remember to lock the lock screw and support collar after
aligning the height of the microscope.
Turn the zoom to the highest magnification. By turning the focusing knob, focus the sample until the
image is clear and sharp.
Turn the zoom (or change the objective by rotation) down to the lowest magnification. Adjust the diopter
focusing knob of the right eyepiece until the mage of the right eyepiece s clear and sharp.
Magnification
Select the desired magnification by adjusting the zoom knob. Change the eyepieces and,/or add an
appropriate magnifying objective lens if necessary
Total magnification used can be calculated by the following equation:
Total magnification = Eyepiece magnification x Zoom magnification x Normal working distance for the
standard configuration is 90mm.
Knowing your microscope
For LAB series stereomicroscope the binocular is built together with the stereo body to form a single piece
named "Stereo-head'.
The Stereo body is the key part of the microscope which includes the Greenough stereo-zoom system
1x4x. or objective 2x 4x. This system includes two telescopic zoom optics working for the left and the right
eyepiece tube separately.
With this system, the user can enjoy excellent depth of field and stereo effect. With the help of the
precision optics from Ryf, perfect parfocality can be maintained throughout the who e zoom range.
Zoom knob in LAB-2 is located bilaterally on both sides of the microscope and is printed with scale
showing the zoom magnification used. Adjust this knob for changing the magnification oft he image. if the
microscope is properly aligned, the image focus should always be maintained when zoom magnification is
changed [parfocal].
The stereo body is mounted onto the circular mount of the focusing carrier and is locked by the lock screw
on the left hand side of the carrier. During the operation of the microscope, the Lock screw should a ways
be locked to maintain stability.
