TM 5-6675-319-14
a. Autofocusing.
Accomplished by interaction of the right and left inversor
u n i t s a n d t h e t i l t c o n t r o l m e c h a n i s m ( l e f t a n d r i g h t ) .
The inversor units are
mechanical linkage systems which move the lens support arm and easel in proper
correlation to retain sharp focus condition at the easel during magnification opera-
t i o n .
When the inversor units are tilted from their 0 degree position, the easel
arm pivot assemblies maintain a common line of intersection of the three critical
planes.
The inversor units are actuated by the magnification drive .
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