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Epoxy adhesives secure optical elements to holders securely and inexpensively and provide sufficient setting time for alignment while not delaying production.
English (United States)
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Optics Mounting with Adhesives
Epoxy adhesives secure optical elements to holders securely and
inexpensively and provide sufficient setting time for alignment while not delaying
Optical mirrors and lenses for copiers require accurate positioning which,
during alignment and thereafter, fasten securely against vibration, mechanical
and normal shaking, stresses on movement. An adhesive with these attributes
must also have: - a setting time quick enough for Production use but sufficiently
slow to permit alignment, - no appreciable change in value during setting, - an
ability to flow into voids and across surfaces without migrating onto critical
surfaces, - minimal outgassing, - sufficient body to fill gaps, - bond to glass,
aluminum and various steels, and - retain flexibility sufficient to absorb them at
expansion and shocks, but hard enough to maintain optics position. One
commercially-available epoxy adhesive meeting these requirements is SCOTCH-
WELD #2216 B/A (product of 3M Company).
In Fig. 1, the epoxy adhesive is applied along glue lines which retain a mirror
between two locators and a bracket. Retainers in Fig. 2 eliminate threaded
screw holes. All retaining hardware is eliminated in Fig. 3.
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