Infra-red
Extra-Broadband AR Coatings |
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- Extra-broadband 2.5 - 13 m bandwidth
- Imaging applications
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| These extra-broadband coatings
work effectively over the entire useful IR optical spectrum from
2.5 to 13 m, except for the silicon coating which works only over
the passband of silicon (2.5 - 5 m). They are useful for imaging
applications including imaging with dual passband systems. They
provide an average reflectance of less than 5% over this range.
This does not put them in the category of high performance anti-reflection
coatings but when broad bandwidth is essential they provide a good
overall transmission. The coatings can be adapted to either normal
or 45 incidence so please specify the intended angle of incidence
when ordering. It is also helpful if you specify the major wavelength
of interest so the coating can be tuned for best performance at
that wavelength. These coatings are highly durable and resistant
to laser damage and can be used with CO2 lasers. They may be cleaned
repeatedly using normal optics handling techniques. |
Specifications |
Angle of Incidence |
0 or 45deg |
Absorption |
< 0.3% per surface |
Damage Threshold |
>5 kw / cm2 |
Durability |
Meet adhesion and abrasion
per MIL-C-675 |
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IR Coatings