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4.1.3
4 - 13
① Before removal ② Aperture replacement tool and the orifice unit
③ Turn the orifice unit and the tool together ④ Removal
Fig. 4.1-28 Removing the Orifice Unit (2)
To remove the orifice unit, first insert the tip (the M4 male screw) of the part inside the
replacement tool into the hole located on the underside of the objective lens, and screw it
into the orifice unit, as illustrated in Figure 4.1-28 ②. In this step, align the outer groove
of the aperture replacement tool with the circular groove located in the lower part of the
orifice unit. After that, rotate the outer part of the replacement too counterclockwise, as
shown in Figure 4.1-28 ③, and then remove the orifice unit, as shown in Figure 4.1-28 ④.
IMPORTANT: Subjecting the objective lens to shock or scratching it can significantly reduce
system performance. The replacement operation should be performed with
great care. Also, care should be exercised so that no dirt or dust will get on the
objective lens.
Orifice unit
P/N 52E-6563
Turn grooved tool
counterclockwise
Pull out orifice unit and tool
Aperture replacement tool
P/N 52E-6560
Align tool groove with
orifice groove
Objective lens