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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
Spectral range
Suitable for
• Unique product - one-of-a-kind
• Unique coatings (2) achieve only deep UV transmission
• Reflects 390-1200nm
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
Suitable for
(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

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
Suitable for
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.

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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