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:
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.
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.
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,
bubbles, or other defects are visible even
under microscopic inspection.