UV longpass filters

Nearly 50 years of experience in coating processes and the new Magnetron Sputtering Technology combined with Japanese discipline, enables such outstanding specifications in all types of filters.


Request a quote

    • Chemistry
    • Biotechnology
    • Medical technology
    • Semiconductor industry
    • Photovoltaics and more

    Product features:

    The ASAHI Spectra UV long pass filters have very steep flanks between the reflection and passband regions, while maintaining very high transmittance in the UV transmission range. The spectral transmission properties are constant over the entire passband of the filters.

    UV long pass filters can be combined in pairs with UV short pass filters to produce a variety of transmission bands.

    Overview of the standard products of the UV long pass filters
    DescriptionCut-on (nm)Thickness (mm)Item# 25mm dia.Item# 50 x 50mm
    Longtpass Filter / UV 250nm2501XUL0250ZUL0250
    Longtpass Filter / UV 275nm2751XUL0275ZUL0275
    Longtpass Filter / UV 300nm3001XUL0300ZUL0300
    Longtpass Filter / UV 325nm3251XUL0325ZUL0325
    Longtpass Filter / UV 350nm3501XUL0350ZUL0350
    Longtpass Filter / UV 385nm3851XUL0385ZUL0385
    Longtpass Filter / UV 400nm4001XUL0400ZUL0400

    The long pass filters are available in two standard sizes:

    • Round with 25mm diameter or
    • square 50x50mm

    Special cuts or customized filters with other pass-through or blocking ranges can be made. Please contact your technical advisor for more information.