Motic Instruments Inc. Canada
October 06, 2006
26
3.17 Aligning the arc lamp
•
Remove the stage plate insert from the stage
•
Take off one of the nosepiece dust caps, or remove an objective from the
nosepiece and screw on the centering tool with ground glass and inscribed cross
hair in its place.
•
Rotate it into the light path.
Fig. 20
•
Centre the lamp while observing the window of the centering tool.
•
To begin alignment of the lamp, rotate the collector
lens focus knob to produce a sharp image of the arc
on the window of the centering tool.
•
Rotate the lamp horizontal and vertical centering
screws until the arc image is in the centre of the
window.
•
Using the collector lens focus knob, spread the beam to achieve an evenly
illuminated field. The final scattering of the beam is checked on an actual
fluorescent specimen.
•
The size of the image of the arc can be made bigger or smaller by manipulating the
collector lens focus knob.
Lamp Centering tool
