4 - 19
4.5.2 Blocking in passive mode
This is a procedure to block at the rim center by
decentering the optical center.
When PAS (Passive) is selected for the layout
mode, how much and in what direction the
optical center should be decentered appears at
PAS
after lens layout is finished.
The on-the-frame-center blocking can be
achieved by decentering the optical center as
indicated.
1. Mark at the optical center of a lens with a
lensmeter.
See Step 1 of “4.5.1 Blocking in active mode”
(p. 4-18).
2. Block the convex surface of the lens with a
suction cup.
Decenter the optical center in accordance with
the indication at PAS
.
e.g. PAS :
o
2.0
:
p
5.0
Decenter the optical center 2.0 mm to the right
and 5.0 mm to the bottom to block.
NOTE
• For processing a polycarbonate lens, be sure to use a lens cup in order to prevent the
cup from moving during processing.
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2 mm
5 mm
Marked point
<When using NIDEK centering device CE-1>
Summary of Contents for LE-9000LX
Page 1: ...PATTERNLESS EDGER Model LE 9000LX OPERATOR SMANUAL ...
Page 17: ...2 9 Top view or or ...
Page 19: ...2 11 ...
Page 145: ......