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2.6. Adjusting Focus
(a) Intensity Control Bar (b) Optimum
(c) Too high (d) Too low
Figure 2.3: Intensity Control
2.6 Adjusting Focus
Using the Z-axis
You can measure samples of many different sizes by raising or lowering the z-axis. You adjust
the height of a manual z-axis by turning the focus knob on the right side of the instrument (see
Figure 2.4a); turn the knob clockwise to raise the z-axis and counter-clockwise to lower it. On a
motorized z-axis focus is controlled either via the z-axis wheel (see Figure 2.4b) or through the
Vision64 software (see Figure 2.4c). To find fringes on a sample, you must adjust the z-axis to put
the sample surface in focus.
(a) Manual focus knob (b) Motorized z-axis wheel (c) Vision64 software
Figure 2.4: Focus Adjustment Mechanisms
A high speed focus mode is available on motorized z-axis systems when the Fast button next
to the z-axis wheel is pressed. To control the z-axis from the software, click the red center bar and
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