Long Wave Pass Edge Filters

Long Wave Pass Edge Filters

Long Wave Pass Edge Filters

Long Wave Pass (LWP) edge filters represent Andover's solution for precise spectral control in longer wavelength regions.
These filters employ first-surface dielectric coatings to achieve sharp transitions between transmission and blocking regions, delivering superior performance compared to conventional colored glass filters.
Designed to transmit longer wavelengths while effectively blocking shorter ones, these filters provide excellent spectral discrimination across the 300-1000nm range, with at least 85% average transmission from the 50% cut-on point to 2000nm, making them ideal for demanding optical applications requiring precise wavelength selection.
  • Excellent longer wavelength transmission
  • Broad wavelength coverage (300-1000nm)
  • Steeper transitions than colored glass
  • Durable first-surface dielectric coatings
  • Standard and custom wavelength options
  • Superior environmental stability
  • Excellent handling durability
  • Multiple size options available
  • Compatible with standard mounting systems
  • Laser line cleanup
  • Photometry systems
  • Color enhancement
  • Beam combining
  • Spectral analysis
  • Precision optical systems
  • Thickness: 4.0mm maximum
  • Size Tolerance: +0.0mm/-0.5mm
  • Clear Aperture: 95% of outside dimension
  • Substrate: BK-7, Soda Lime or equivalent
  • Flatness: 3-5 waves per 25mm
  • Surface Quality: 80/50 per MIL-C-48497A
  • Operating Temperature: -50°C to +100°C
  • Cut-off Slope: ≤6%
  • Cut-off Tolerance: ±10nm (400-1000nm), ±5nm (300-375nm)
  • Transmission: ≥85% average in transmitting region
  • Available unmounted or in threaded rings
  • Effective Index of Refraction: 1.7 (approximate)
    PART NO.
    DESCRIPTION
    1 - 5 pcs.
    6 - 10 pcs.
    > 10 pcs.
    Stock Status

    100FH90-12.5

    Std. LWP Filter Cut-on WL 1000nm, 12.5mm dia.

    $78.00
    $67.00
    $59.00
    In Stock

    100FH90-25

    Std. LWP Filter Cut-on WL 1000nm, 25mm dia.

    $126.00
    $108.00
    $96.00
    In Stock

    100FH90-50

    Std. LWP Filter Cut-on WL 1000nm, 50mm dia.

    $168.00
    $144.00
    $128.00
    In Stock

    100FH90-50S

    Std. LWP Filter Cut-on WL 1000nm, 50mm x 50mm sq.

    $202.00
    $174.00
    $154.00
    In Stock

    300FH90-12.5

    Std. LWP Filter Cut-on WL 300nm, 12.5mm dia.

    $78.00
    $67.00
    $59.00
    In Stock

    300FH90-25

    Std. LWP Filter Cut-on WL 300nm, 25mm dia.

    $118.00
    $101.00
    $90.00
    In Stock

    300FH90-50

    Std. LWP Filter Cut-on WL 300nm, 50mm dia.

    $161.00
    $138.00
    $122.00
    In Stock

    300FH90-50S

    Std. LWP Filter Cut-on WL 300nm, 50mm x 50mm sq.

    $191.00
    $164.00
    $145.00
    In Stock

    325FH90-12.5

    Std. LWP Filter Cut-on WL 325nm, 12.5mm dia.

    $78.00
    $67.00
    $59.00
    In Stock

    325FH90-25

    Std. LWP Filter Cut-on WL 325nm, 25mm dia.

    $118.00
    $101.00
    $90.00
    In Stock

    325FH90-50

    Std. LWP Filter Cut-on WL 325nm, 50mm dia.

    $161.00
    $138.00
    $122.00
    In Stock

    325FH90-50S

    Std. LWP Filter Cut-on WL 325nm, 50mm x 50mm sq.

    $191.00
    $164.00
    $145.00
    In Stock

    350FH90-12.5

    Std. LWP Filter Cut-on WL 350nm, 12.5mm dia.

    $78.00
    $67.00
    $59.00
    In Stock

    350FH90-25

    Std. LWP Filter Cut-on WL 350nm, 25mm dia.

    $118.00
    $101.00
    $90.00
    In Stock

    350FH90-50

    Std. LWP Filter Cut-on WL 350nm, 50mm dia.

    $161.00
    $138.00
    $122.00
    In Stock

    350FH90-50S

    Std. LWP Filter Cut-on WL 350nm, 50mm x 50mm

    $191.00
    $164.00
    $145.00
    In Stock