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Frequently
Asked Questions
If the question you are looking for is not in this list,
please do not hesitate to contact us.
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| 1.
Q. |
What
type of filter do
you manufacture in the UK? |
| 2.
Q. |
We're
at an early stage in product design and don't require more
than a few filters, can you provide prototypes or samples to
help us? |
| 3.
Q. |
What
makes an infrared linear variable filter special? |
| 4.
Q. |
Do
you have a stock of infrared optical filters available off the
shelf? |
| 5.
Q. |
Do
you operate a Quality System? |
| 6.
Q. |
Do
you make filters to meet the needs of the space / defence
industry? |
| 7.
Q. |
Can
I speak to one of your filter designers if I need to? |
| 8.
Q. |
Do
you make filters for ground based astronomy? |
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Answers |
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1.
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We have
four coating chambers here in the UK; all dedicated to the
production of infrared optical filters from 2 to 35mm.
These can be notches, bandpasses, edge filters (Long wave /
short wave pass) and infrared linear variable optical filters.
(See our Products page
for more details)
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2.
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Yes
we can (and do).
This is
actually our speciality in the UK. Whilst we can accept small
production volumes of any kind of interference filters, we are
best suited to do research and prototype parts. We do appreciate that
manufacturing companies have to go through a development
process before a new product can be released to the market.
This usually means that only a small number of components are
required at the early stages. If you are at this stage please
talk to us, we'd be happy to help.
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| 3. |
An
infrared linear
variable (sometimes called a wedge filter) is unique in
as much as the coating thickness varies across the surface of
the filter This variation is linear. This gives them some
interesting spectral characteristics, the centre wavelength of
the filter will vary along the length of the filter. See the
IRLVF Page for more information. |
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4.
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No we don't.
However....
We do
sometimes have overage parts, coming from previous production
runs. Contact us for more information.
At the moment we hold few bandpasses 8 to 12µm and
narrow bandpasses at 10.6µm on 1" diameter x 1mm
thick Ge substrates.
We also have a
number of linear variable filters available.... please call or
.
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5.
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Certainly.
We manufacture
precision optical filters, this requires tight process
controls from start to finish. We aim to have full ISO 9001
Certification by the end of this year.
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6.
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YES.
We have a very
enviable reputation in both space and defence sectors. Barr
Associates has over 100 space missions to its credit and is a
preferred supplier to many defence contractors.
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7.
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Yes,
of course.
We have always
advocated that engineers should talk to engineers and we'd be
happy to talk with you.
Alan
Whatley will be your
main contact.
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8.
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Yes
we do.
We understand
that the astronomers needs are quite unique and this means
providing a unique optical filter solution.
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