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UV Bandpass Filters
These filters are suitable for both passing and blocking select ultraviolet
wavelength ranges. It is important to use UV pass/visible block filters
in applications that actually involve imaging at UV wavelengths.
Broadband
UV Bandpass filter - Recommended for deep broadband UV imaging |
|
Model |
Spectral range |
Features |
Suitable for |
BP250 |
290-380nm |
• Unique product - one-of-a-kind • Unique coatings
(2) achieve only deep UV transmission • Reflects 390-1200nm
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Deep broadband UV imaging |
The BP250 filter is a very broadband
UV filter for deep-UV imaging is offered in a limited number of
sizes and not intended for use with standard CCD/CMOS cameras.
To take advantage of this filter, essentially a high-end camera
or viewer with deep-UV sensitivity and a top objective lens designed
specifically for UV imaging are required.
This filter has peak transmission of approximately 40% around 235nm,
and transmission gradually slopes downward to less than 0.3% at
405nm.
This particular filter and the polarizers are the only ones Adept
Turnkey supplies that are not hard-coated and/or single substrate.
The BP250 is made with two pieces of specially coated glass cemented
together with the soft coating faces to the inside for protection.
It is the only filter that does with the BP250 does. |
UV-A/B***
Bandpass Filter - Recommended for mid- to near-UV imaging |
|
Model |
Transmission |
Features |
Suitable for |
BP324 |
(UV) 270-375nm and (NIR) 690-750nm |
• Absorbs visible and most IR • Broad spectral bandwidth
in the ultraviolet • Effectively blocking visible and infrared
light |
Blocking visible light while passing UV
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BP324
single substrate filters have broad spectral bandwidth in the ultraviolet,
while effectively blocking visible and infrared light. These filters
are particularly useful in true UV imaging applications, where blocking
of these longer wavelengths is essential, and the camera employed
is often designed to be particularly sensitive in the ultraviolet.
Both the UV-A and UV-B portions of the ultraviolet spectrum are
passed, while the UV-C portion is blocked. Aside from mounted versions
that are placed in front of the camera lens, different configurations
can also be supplied for mounting in front of low power ultraviolet
LED light sources for blocking visible output.
For other types of higher wattage, high-energy UV light sources,
the BP365 filter is recommend.
UV-A = 400-320nm***
UV-B = 320-290nm
UV-C = 290-100nm |
Blacklite/UV-A
Bandpass Filter - Dichroic filter. Blocks visible light at the source
while passing UV |
|
Model |
Transmission |
Features |
Suitable for |
BP365 |
UV 315-400nm, 815nm and above |
• Blocks the visible and pass UV light • Passes
395nm wavelength LED light • Filters UV light sources that
also contain a significant amount of visible light such as mercury
and metal halide lighting |
All UV LED, UV fluorescent and other UV-producing lamp-based lighting.
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The BP365 UV Blacklite dichroic filter
is particularly well suited for use with all UV LED, UV fluorescent
and other UV-producing lamp-based lighting. The new filter material,
designed to block the visible and pass UV light, now passes 395nm
wavelength LED light and is also appropriate for filtering UV light
sources that contain a significant amount of visible light such
as mercury and metal halide lighting.
Centered at 365nm, the single substrate, hard-coated BP365, made
of a low-expansion glass very similar to Pyrex, features higher
transmission than might normally be expected
in this range. Generally, UV bandpass filters tend to have somewhat
lower peak transmission, are more expensive and may have some amount
of visible light "leaking" through them. This is not the
case with the BP365. Although a small amount of deep-blue/near-UV
light does leak through, it is usually considered insignificant.
Can be customized to fit individual lighting needs either mounted
or unmounted, in sizes ranging from a few millimeters to over 24"
(600mm) in diameter.
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