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Metallized Optical Windows
One of the major cost drivers
for perimeter metalized optics is the application of the masking, and the tolerance on the location of the masking, and subsequently,
the sputtered metal films themselves. The tighter the concentricity specification, the more difficult it is to mask. A concentricity
(total indicator runout) of .002" to .003" is typical. To save cost, some of our customers apply their own masking,
which is often a "dot" of kapton tape. Concentricity is not as good, at between .004" to .006", but this
is definitely the lowest cost option.
Another cost driver is the size and shape of the component.
Very small infrared
windows (under .25" dia.) are difficult to handle, thereby masking is more difficult. Domed optics, regardless of size,
require more painstaking masking, hence, the cost is higher.
We can mask your components such that the metal deposit
is on the flat and the edges, or just on the vertical edge.
The solderable coatings choice will also affect the
cost. Platinum, obviously, is more expensive than nickel, and will impact cost to some degree. We feel that the higher
reliability, and infinitely longer shelf life achieved with platinum as the solderable layer is well worth the additional
cost.
Every project is always a little different. Please feel free to call or email us with the specifics of your
application and we can help you make these decisions and get you a price quote very quickly.
Service
with a personal touch has become our trademark. We can typically can turn around your order in one to two weeks ARM.
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