• Graph showing the transmission percentage on the y-axis against wavelength on the x-axis for a LP900 longpass filter, indicating a cut-on wavelength of approximately 900nm and transmission range from 915 to 1100nm.
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LP900 Longpass Filter (T>90%@915-1100nm, OD4@200-890nm)

LP900 Longpass Filter (T>90%@915-1100nm, OD4@200-890nm)

$50.00 USD
$50.00 USD
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Shipping calculated at checkout.
Cut-on Wavelength
Transmission // Blocking
Dimension

In Stock.

Ships within 5 working days of order.
  • Wavelength: LP900 longpass filter optimized for NIR applications from 915-1100nm
  • Spectral Features: Sharp cut-on at 900nm with >90% transmission above 915nm for superior signal clarity
  • Optical Density: OD4 blocking from 200-890nm ensures deep rejection of shorter wavelengths
  • Filter Dimension Availability: Multiple sizes available – contact us for custom dimensions and mounting options

Transmission & OD Data

The transmission curve is typical. Actual data may vary from lot to lot, you can request the raw Transmission and OD data from us.

Copy the link of the product page and send email to info@syronoptics.com to get raw data.

Shipment & Delivery

Shipment will usually be made within 5 working days after order.

Delivery from local warehouse is available for below countries and region.

  1. USA
  2. UK
  3. Europe
  4. China
  5. Singapore

To request shipment from local warehouse you need to provide your order number to order@syronoptics.com and inform us from which warehouse you want to initial the shipment.

Return & Refund

Stocked Product are eligible to return within 7 days after receiving.

A flat rate of 35$ will be charged for returning.

Payment Notice

Payment could be done online with Credit Card, Apple Pay, Google Pay.

Amount will not be deducted immediately after you authorized the payment. We will share raw data for confirmation by email, only after confirmation the amount will be deducted.

For amount under $100 you can request to make payment within 7 days after received the product. (NET7)

Custom Sizing

Custom sizing is available for dimension under 60x60mm. Without mounting the thickness will generally ranging from 0.5-3mm.

For bigger size, contact info@syronoptics.com for details.

Custom Mounting

We have filter mounting option including:

  • Threaded Mounting
  • Retaining Ring
  • Filter Wheel
  • Filter Cube
  • Filter Slide

Buy in Bulk

For order quantity (or equal coating size) above 100pcs x dia25mm filters. Discount will be available.

Generally the discount will be ranging from 10 - 50% depending on the quantity and specification you are ordering.

lp360-d12.5

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  • LP900 Longpass Filter - Laser Diode Inspection

    LP900 Longpass Filter - Laser Diode Inspection

    Laser Diode Inspection

    Specifically used for viewing 915nm laser diodes. The filter blocks the laser's "pump" light or ambient noise, allowing the camera to see only the reflected laser light.

    Recommended Light Sources

    To use this filter effectively, your light source must output significant energy above 900nm. Standard white LEDs will appear completely black through this filter.

    • 915nm or 940nm LEDs: These are the ideal matched sources. The LP900 will pass nearly 100% of their output while blocking all other ambient interference. 940nm is a common "covert" IR wavelength.
    • 915nm Laser Diodes: As mentioned in applications, this is a specific target wavelength for this filter.
    • Xenon Strobes: While Xenon covers the full spectrum, it has strong IR output. The filter will cut the visible flash, leaving only the high-intensity IR pulse for the camera.
    • Halogen/Tungsten: These run hot and output massive amounts of infrared light (up to 2000nm+), making them excellent sources for LP900 applications, provided heat management is not an issue.
  • LP900 Longpass Filter - Forensics

    LP900 Longpass Filter - Forensics

    Forensics (Blood & Gunshot Residue)

    When used on a camera with its IR-cut filter removed, the LP900 can reveal blood stains or gunshot residue on dark fabrics (like denim) by making the fabric appear white/reflective while the residue remains dark.

    Recommended Light Sources

    • High-Intensity 940nm IR LED: 940nm is a standard infrared wavelength that sits perfectly inside the LP900’s transmission window (T>90%).
    • Halogen or Tungsten Incandescent Lamp: Unlike modern white LEDs (which emit very little IR), a halogen bulb emits a massive broadband spectrum that includes deep infrared.

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