Huvitz Excelon - Page 32

Excelon Operator’s Manual 31
Comparison with active blocking and passtive blocking
• Be sure to execute Boxing Center for the followings.
☞ PD(=Pupil Distance) is in eccentric position
☞ Horizontally wide frame
☞ Super hydrophobic lens or ultra hi-index lens
Active Blocking
Passive Blocking
Blocking
Position
Optical Center of Lens
Geometrical Center of
Frame
User
Convenience
Just following the Marking Spot
of Lensmeter
Have to move the Lens
according to GUI
Minimum
Edging Size
There can be additional limitations
because of PD, OH(=Optical Height)
No additional limitation
B
B
l
l
o
o
c
c
k
k
L
L
e
e
n
n
s
s
Edging Quality
of Beveling or
Grooving
Lens
Grinding Wheel
Block
Eccentric Edging
Centric Edging
!
NOTE