Longpass Filter

• Wide range of cut-on wavelengths from 360nm to 1600nm

• Optical density options from OD2 to OD5 for effective light blocking

• Customizable dimensions up to 60mm diameter

• High transmission efficiency (≥85%) above cut-on wavelength

• Steep edge transition for precise wavelength separation

Longpass Filter Banner
LP1300 Longpass Filter (T>90%@1380-2200nm, OD2@200-1250nm)
$45.00
LP1600 Longpass Filter (T>85%@1620-2000nm, OD4@200-1580nm)
$45.00
LP1400 Longpass Filter (T>85%@1420-2500nm, OD4@200-1380nm)
$45.00
LP1400 Longpass Filter (T>85%@1420-1750nm, OD4@200-1380nm)
$45.00
LP1200 Longpass Filter (T>85%@1210-1750nm, OD5@200-1190nm)
$45.00
LP1040 Longpass Filter (T>85%@1050-1750nm, OD5@200-1020nm)
$45.00
LP1000 Longpass Filter (T>85%@960-1750nm, OD5@200-990nm)
$45.00
LP975 Longpass Filter (T>85%@910-1750nm, OD5@200-965nm)
$45.00
LP950 Longpass Filter (T>85%@960-1750nm, OD5@200-940nm)
$45.00
LP900 Longpass Filter (T>85%@910-1750nm, OD5@200-890nm)
$45.00
LP850 Longpass Filter (T>85%@860-1750nm, OD3@200-840nm)
$45.00
LP825 Longpass Filter (T>85%@835-1750nm, OD5@200-815nm)
$45.00
LP800 Longpass Filter (T>85%@810-1750nm, OD5@200-790nm)
$45.00
LP785 Longpass Filter (T>85%@795-1750nm, OD5@200-775nm)
$45.00
LP750 Longpass Filter (T>85%@760-1750nm, OD5@200-740nm)
$45.00
LP710 Longpass Filter (T>85%@720-1100nm, OD3@200-700nm)
$45.00
LP700 Longpass Filter (T>85%@710-1750nm, OD5@200-690nm)
$45.00
LP675 Longpass Filter (T>85%@685-1750nm, OD5@200-665nm)
$45.00
LP650 Longpass Filter (T>85%@660-1750nm, OD5@200-640nm)
$45.00
LP600 Longpass Filter (T>85%@610-1750nm, OD5@200-590nm)
$45.00

  • Search for Logpass Filter

    Using LP + [Cut-on Wavelength] + Filter to find the filter on our website or on Google.
    e.g: LP950 Filter

  • Dimension and Mounting

    For most of the longpass filter, we can provide any dimension under diameter 60mm. And we can provide relevant mounting along with the filters.

Optical Specifications

  1. Cut-on Wavelength: This is the primary defining feature of a longpass filter, determining the boundary between blocked and transmitted wavelengths.
  2. Edge Steepness: Refers to the sharpness of the transition from blocked to transmitted wavelengths. Filters with steeper edges provide more precise wavelength separation.
  3. Optical Density (OD): Measures the filter's ability to block light in the rejection band. Higher OD values indicate better blocking efficiency.
  4. Transmission Efficiency: Longpass filters are designed to have high transmission (often ≥91%) for wavelengths above the cut-on point.

Physical Specifications

  1. Size and Shape: Longpass filters come in various sizes and shapes, including circular, square, and rectangular formats, to fit different optical setups.
  2. Thickness: The thickness of the filter can affect its optical properties and how it fits into the optical system.
  3. Substrate Material: Common materials include fused silica, BK7 glass, or colored glass, each offering different properties and suitable for specific wavelength ranges.

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