Tech Briefs Magazine - November 2021 - PIT-13

film coating. The reflected
wavefront may be distorted
after the coating is applied.
Engaging your optics partner
early in the design
process will help mitigate
the effects of coating stress.
It is also important to select
an optics partner that has the
capability
er. They must have extensive
knowledge
of
the
to
measure and
compensate for that stress.
Post-coat metrology may be
problematic if there isn't the
metrology equipment available
at the wavelengths needed.
Without it, it may not be
possible to know if the optic
meets required performance
criteria until it is integrated
into the system, and this is
the wrong time to find out
that there is a problem.
Figure 3. The coating room at ZYGO
Such issues are best mitigated during
the design phase. Compensation techniques
that can be used include finite
element analysis (FEA), sample surrogate
coating tests, polishing a bias into
the cladding, stress compensation, and
coating on the backside.
Summary
When embarking on an HEL optics
application, the selection of an optical
manufacturing partner is the key to
success. The chosen optical component
expert should be viewed as a
design partner, not a job shop suppli
  
you're looking for
in precision optical
solutions?
material properties and
design parameters for the
different flavors of SiC,
and no vested interest in
promoting one specific
type of material over
another. They must pay
attention to detail on clad -
ding type and cladding
requirements, have metro -
logy capabilities, and the
engineering resources to
predict and mitigate common
issues such as coating
stress and print-through.
Finally, they need to have
program management ex -
pertise for these types of
applications and thin film
coating expertise, all un -
der one roof. In other words, vertical
integration is key.
This article was written by Joe Salemi,
OEM Sales Manager, and Mike Albrecht,
Optics
Product
Line
Director,
(Middlefield, CT). For more information,
visit http://info.hotims.com/79419-220.
...your search ends here.
Glass Substrates
Precision Optical Components
Complete Fabrication Capabilities
Thin Film Coatings
Infrared Materials Fabrication
ZYGO
Coatings. Fabrication. Substrates. All in one place.
Finding a single source for your precision optical components can be frustrating. Look no further.
            
all from our in-house facility. No matter the complexity, our team will help optimize your design and
deliver your precision components, with speed and precision. Your search is over. Contact us today.
®
Precision Glass Optics
714.540.0126 / info@pgo.com
www.pgo.com
Photonics & Imaging Technology, November 2021
Free Info at http://info.hotims.com/79419-708
Cov
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13

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Tech Briefs Magazine - November 2021

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