MicroLinks VT300 - user manual - Manual (Page 46)

Microscope Application Program http://www.ViTiny.com
Copyright ©2008-2012 MicroLinks Technology Corp.
 When the magnification is high, use the calibrator can easily and accurately
knows the scale range.
 When the magnification is high, metal ruler is less accurately than a
calibrator.
 When the magnification is low, a metal ruler can be suitable.
(2) Calculate scale range
First, the scale setting must be calculate the horizontal and vertical scale range, the
following has several steps to decide the scale range. It is suggested that to adjust the
window size to a single 640*480 window：
 To decide measure distance between machine and observation objects.
 To adjust the focus to see the image as clear as it can.
 Calculate the observation preview image of horizontal and vertical scale.
Calculate the range shown in Fig. 5-36.
After setup the horizontal and vertical scales, the machine, the observation distance
and focus are not allow to readjustment.
Fig. 5-33 Horizontal and vertical measurement range
(3) Calibrate “contacted and “non-contacted” scale
 Contacted scale: Put the machine onto the calibrator for small field of view, it
can apply for a focus point at Low or High magnification.
 Non-contacted scale: To hold the machine by the supporter, fix the machine
overhead a ruler for a certain distance, it can observe a wider field of view.