Olympus USPM-RU-W Series Operation Manual page 33

4.6. Setting the BK7 reference sample
/Setting the sample to be measured
(1) Place the BK7 reference sample the sample to be measured on the top surface of
the shift stage. To avoid unnecessary reflected light, it is recommended to put the
BK7 reference sample the sample to be measured on the center of the stage, where
there is a hole for letting light pass.
4.7. Adjusting the position of the BK7 reference sample
/Adjusting the position of the sample to be measured
[How to switch the window]
Double-click anywhere on the black area to switch between FOCUS and CT in the LIVE
window. You may obtain the same effect through choosing [Live] on the menu.
(A FOCUS window appears when the time the software opens.)
(1) Adjust focus on the BK7 reference sample the sample to be measured .
First, select the check box marked "AUTO" at the lower right of the FOCUS window.
Looking at the FOCUS window, use the focus adjuster to get an optimum focus
position of the BK7 reference sample the sample to be measured .
The focus adjuster contains a coarse tuning knob and a fine tuning knob.
The optimum focus position is the one that returns the smallest value of FOCUS:xxxx
(at the upper left of the window).
Being out of focus
PV8344F4E013
Focus is found
31
LENS
Optimum position