First-surface UV Filters

First-surface UV Filters

First-surface UV Filters

First-surface UV filters represent Andover's specialized approach to UV optical bandpass filtration, featuring precision coating deposition on a single surface of UV-Grade Fused Silica or UV Filter Glass substrates.
Unlike traditional UV filters, this design places all filtering elements on the exterior surface, maximizing transmission efficiency while minimizing internal reflections and light scatter.
These filters incorporate a protective hard-oxide overcoat, providing exceptional durability against environmental factors and normal handling.
The unique single-surface design, combined with premium substrate materials and advanced coating technology, delivers superior UV wavelength isolation while maintaining excellent out-of-band rejection.
This makes them particularly well-suited for applications requiring precise UV light control, such as sterilization systems and environmental monitoring, where reliability and performance are critical.
  • Superior optical performance with single external surface coating
  • Enhanced durability through hard-oxide protective layer
  • Premium substrate materials optimize UV transmission
  • Reduced internal reflections compared to dual-surface designs
  • Extended lifetime due to protective coating
  • Consistent spectral performance across the UV range
  • Environmental monitoring and analysis
  • UV sterilization systems
  • Water treatment facilities
  • Air purification systems
  • Semiconductor processing
  • UV curing applications
  • Scientific research instrumentation
  • Quality control and inspection systems
  • Diameter Tolerance: +0/-0.25mm
  • Surface Quality: 80-50 per MIL-PRF-13830B
  • Operating Temperature Range: -50°C to +50°C (214-380nm) -50°C to +70°C (380.1-2400nm)
  • Humidity Resistance: Meets MIL-C-48497A
  • Out-of-Band Blocking: 1 x 10-4 average from X-ray to FIR
  • Available Sizes: 25.0mm Ø (21.0mm usable) 50.0mm Ø (45.0mm usable)
  • Mounting: Unmounted standard
  • Optical Quality: Commercial instrumentation grade

Showing 1–16 of 51 results

    PART NO.
    DESCRIPTION
    1 - 5 pcs.
    6 - 10 pcs.
    > 10 pcs.
    Stock Status

    193HX15-25

    193nm Bandpass Filter, FWHM 15nm, 25mm dia., first-surface coated.

    $364.00
    $331.00
    $295.00
    In Stock

    193HX15-50

    193nm Bandpass Filter, FWHM 15nm, 50mm dia., first-surface coated.

    $607.00
    $552.00
    $492.00
    In Stock

    200HX10-25

    200nm Bandpass Filter, FWHM 10nm, 25mm dia., first-surface coated.

    $364.00
    $331.00
    $295.00
    In Stock

    200HX10-50

    200nm Bandpass Filter, FWHM 10nm, 50mm dia., first-surface coated.

    $607.00
    $552.00
    $492.00
    In Stock

    214HX10-25

    214nm Bandpass Filter, FWHM 10nm, 25mm dia., first-surface coated.

    $364.00
    $331.00
    $295.00
    In Stock

    214HX22-25

    214nm Bandpass Filter, FWHM 22nm, 25mm dia., first-surface coated.

    $364.00
    $331.00
    $295.00
    In Stock

    214HX10-50

    214nm Bandpass Filter, FWHM 10nm, 50mm dia., first-surface coated.

    $607.00
    $552.00
    $492.00
    In Stock

    214HX22-50

    214nm Bandpass Filter, FWHM 22nm, 50mm dia., first-surface coated.

    $607.00
    $552.00
    $492.00
    In Stock

    220HX10-25

    220nm Bandpass Filter, FWHM 10nm, 25mm dia., first-surface coated.

    $364.00
    $331.00
    $295.00
    In Stock

    220HX10-50

    220nm Bandpass Filter, FWHM 10nm, 50mm dia., first-surface coated.

    $607.00
    $552.00
    $492.00
    In Stock

    222HX10-25

    222nm Bandpass Filter, FWHM 10nm, 25mm dia., first-surface coated.

    $364.00
    $331.00
    $295.00
    In Stock

    222HX10-50

    222nm Bandpass Filter, FWHM 10nm, 50mm dia., first-surface coated.

    $607.00
    $552.00
    $492.00
    In Stock

    228HX10-25

    228nm Bandpass Filter, FWHM 10nm, 25mm dia., first-surface coated.

    $364.00
    $331.00
    $295.00
    In Stock

    228HX25-25

    228nm Bandpass Filter, FWHM 25nm, 25mm dia., first-surface coated.

    $364.00
    $331.00
    $295.00
    In Stock

    228HX10-50

    228nm Bandpass Filter, FWHM 10nm, 50mm dia., first-surface coated.

    $607.00
    $552.00
    $492.00
    In Stock

    228HX25-50

    228nm Bandpass Filter, FWHM 25nm, 50mm dia., first-surface coated.

    $607.00
    $552.00
    $492.00
    In Stock