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(4) Final Adjustment
Repeat the adjustment of (1), (2) and (3) 2 times to find the
optimal location and check whether there are any parts
where the illuminator misses with the naked eye. Find the
lighting location where the brightness of the illuminator is
the brightest to measure the brightness (CL-200), and
inspect for any alien particles and focus line width (refer to
below picture). Then fixate the adjustment screw of the
illuminator.
* Focus inspection method and item
1) Test pattern : Green cross-hatch
2) Set the best focus based on the center of the screen.
3) The focus line width must satisfy the below criteria by
zone. (There must be no dual line)
Up/down
screw A
Right
(tighten
direction)
Adjustment
part
Screen state
Initial state State after adjusting
Screw
direction
Description
At first, upside illuminator goes down
and right illuminator also goes down in
detail.
Left
(loosen
direction)
At first, downside illuminator goes
down and left illuminator also goes
down.
left/right
screw B
Right
(tighten
direction)
At first, left illuminator goes down and
downside illuminator also goes down.
Left
(loosen
direction)
At first, right illuminator goes down and
upside illuminator also goes down.
left/right
screw C
Right
(tighten
direction)
At first, left illuminator goes down and
downside illuminator also goes down.
Left
(loosen
direction)
At first, right illuminator goes down and
upside illuminator also goes down.
4-2. Illuminator Phenomenon Adjustment
Illuminator goes down direction Illuminator goes down area
Zone 1 Zone 2 Zone 3 Zone 4
Line width[mm] 2.0 mm 2.3 mm 2.8 mm 2.8 mm
Focus Examination domain
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