5
This device consists of a coaxal optic system. Light sent forth from 1-Light Source
(LED) lights up 2-Mark Dividing Plate. After passing though 3-Measurement Objective
and 5-Telescopic Objective, 2-Mark Dividing Plate is imaged at position of 6-Eyepiece
Dividing Plate. At this time, through 7-Eyepiece Set, the distinct reticule images of
2-Mark Dividing Plate and 6-Eyepiece Dividing Plate can be seen.
During operation, put spectacle lens at the place of 4-Diaphragm (measurement
bearing scat), and turn diopter measuring hand-wheel and astigmatism turning hand-
wheel so that distinct image of 2-Mark Dividing Plate is obtained. Now, the number
showing on the liquid crystal display screen is just the diopter value of this lens.
3. Functions
3.1 Main View (Fig3)
1
10
11
5
12
13
14
2
3
4
7
6
8
9
Fig. 3
