Coating Optical Components - Continued
Figure 9-29. Holding Fixture
Never wedge the elements tightly into the holding fixture rails. Allow a small amount of clearance
between the elements and the rails for expansion during the coating process. This will prevent
chipping or cracking of the elements.
Loosen rail screws (1) and position rails (2) to the desired spacing.
Position lens elements (3) on rails (2) allowing a small amount of clearance between elements and rails.
Tighten rail screws (1).
If the coating process is not performed immediately, cover the holding fixture and lens elements
with batiste cloth to prevent dust and dirt from contaminating the elements.
Change 2 9-27