14
2.
Press measurement switching key S/C to switch it to mode of cylindrical
lens measurement.
3.
Lightly move lens so that near vision part of bifocal lens (i.e. small lens) is
placed on measurement bearing seat (Fig. 15), and drone is moved to center
of eyepiece visual field.
4.
Turn diopter measuring hand-wheel to obtain clearest focus of drone. At
this time, diopter degree value of this bifocal lens is shown on liquid crystal
display screen (Fig,16), where, SPH is spherical diopter, and CYL is additional
diopter. At this time, AXIS data have no meaning, which can be ignored.
Fig. 15
Matters Needing Attention
*Lift up lens pressing mechanism a little when moving lens.
Fig. 16
Important Matters
If drone cannot be moved to center of eyepiece visual field because of prism function
of lens, please use prism compensator to adjust drone to center of eyepiece visual
field so as to achieve better result of focus.
