ADJUSTMENT | 1. Depression Prism Unit |
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2)If, in this case, such a center displacement cannot be corrected by moving the lens chamber
G), make adjustment of prism 'B,as below:
a)For lateral adjustment, place a piece of silver foil (0.1 mm thick) undemeath, as shown in
Fig. 31, to cause a movement corresponding to 5 scale Unes.
b)For vertical adjustment, move prism @ along the wall of prism mount (D, as shown in Fig. 31.
Fig. 31
(F·tube)
1)Moving lens chamber ® (with @) and ·'.§inside), make the displacement within a range of 2 scale Unes in the Kellner eyepiece.
2)If the center displacement cannot be corrected by moving chamber ®· make adjustment of prism @ ,as below:
P1ace a piece of silver foil (0.1 mm thick) underneath, as shown in Fig. 32, to cause a movement
corresponding to 5 lines.
Silvcr foil
Eycpicce saile
A
B
The center displacement direction of the test plate by a piece of illver foil (A, B)
Fig. 32
