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IDAS Filter Technology
A chain is only as good as its weakest link. This
applies as well to an optical system such as a
telescope/filter/imager system. With this in
mind, IDAS filters are manufactured using unique
technologies that result in quality that meets or
exceeds that of the rest of your optical imaging system:
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IGAD (Ion-Gun Assist Deposition)
This coating technology was originally developed
for the optical communications field where
long-term stability (>25 years) over harsh field
conditions is required.
IDAS is the first manufacturer to apply this
technology to astronomical filters. This results
in superior filters with robust coatings and
long-term spectral stability even under
temperature and humidity extremes. This stability
is especially important for bandpass curves with
steep slopes such as H-alpha, LPS filters, and
other narrow bandpass filters.
IGAD filters virtually eliminate bandpass shifts
from the +/-3 or 4nm typical
of standard coating filters.
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MBT (Multi Band-pass Technology)
This is technology originally developed for
biomedical microscopes, but improved by IDAS
by combining it the IGAD hard-coating technology
described above. The excellent filter responses
possible with this technology allows IDAS to
create very complicated filters for astronomical
use such as the unique LPS filter.
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UFP (Ultra Fine Polish) Finishing
IDAS filters are polished twice as long as
is typical for optical glass. In combination
with the use of high-quality substrate glass,
no scratches,
bubbles, or other defects are visible even
under microscopic inspection.
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