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EXPOSED
COATING DESIGN:
Exposed coating design includes a
substrate with an optical filter coating either on one
surface, or on both surfaces. This type of filters must
be handled with care as the soft filter coating is
completely exposed.
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 ENCLOSED
DESIGN:
The filter consists of two substrates
with optical coatings facing each other so that the
optical coatings are completely enclosed. As shown on a
diagram, a spacer ring is placed between the substrates
to form a small air gap sealed by edge sealant.
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 MOUNTED:
Exposed coating or enclosed filter
designs can be supplied in metal mounting rings, if
required. The rings are constructed from aluminum.
Please note that mounting of a filter increases the
outside diameter of the assembly.
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