• Graph showing the transmission percentage of a LP825 longpass filter against wavelength, with a cut-on wavelength of 825nm and transmission range above 85% from 835 to 1750nm.
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LP825 Longpass Filter (T>85%@835-1750nm, OD5@200-815nm)

LP825 Longpass Filter (T>85%@835-1750nm, OD5@200-815nm)

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

Professional LP825 Longpass Filter - Superior Near-Infrared Optical Filtering

The LP825 Longpass Filter is engineered for demanding near-infrared applications requiring precise wavelength separation at 825nm. With reliable 85% transmission efficiency and superior OD5 blocking, this filter delivers exceptional performance for advanced NIR optical systems with an extended spectral range up to 1750nm.

Technical Specifications:

  • Cut-on Wavelength: 825nm (T=50%)
  • Good Transmission: T>85% @ 835-1750nm
  • Superior Blocking: OD5 @ 200-815nm

Key Applications:

  • NIR Fluorescence Imaging: Ideal for deep tissue imaging and biological studies
  • Biomedical Imaging: Perfect for non-invasive medical diagnostics and therapeutic monitoring
  • Material Analysis: Optimal for polymer, pharmaceutical, and food quality analysis
  • Semiconductor Testing: Essential for silicon wafer inspection and characterization
  • Laser Systems: Effective filtering for 808nm diode laser applications
  • Industrial Sensing: Quality control and process monitoring

Performance Features:

  • Sharp transition edge for precise 825nm cutoff
  • Reliable 85% transmission minimizes signal loss
  • OD5 blocking provides excellent background suppression
  • Extended spectral range to 1750nm for versatile applications
  • Consistent performance across entire filter aperture
  • Low scatter for clean optical systems
  • Stable performance under high-power conditions

Technical Advantages:

  • Extended Range: Broad transmission window from 835nm to 1750nm
  • Superior Blocking: OD5 performance ensures excellent rejection of unwanted wavelengths
  • Research Grade: Professional quality for scientific applications
  • Versatile Design: Suitable for both research and industrial environments

Application Areas:

  • Medical Devices: Non-invasive diagnostic and therapeutic systems
  • Industrial Inspection: Quality control and material characterization
  • Research: NIR spectroscopy and optical studies
  • Agriculture: Crop monitoring and food quality analysis

Quality & Reliability:

  • Advanced multi-layer coating technology
  • Rigorous quality control ensures specification compliance
  • Compatible with standard optical mounts and systems
  • Suitable for both research and industrial applications
  • Designed for high-power NIR laser environments

Perfect for: Near-infrared imaging systems, biomedical research, material analysis, and optical systems requiring superior NIR filtering with extended transmission range and excellent visible light blocking.

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.

View full details

FAQs

What is the thickness of the filter?

The substrate thickness may vary from 0.5 - 2.0mm. You can send email to us for requesting the detail information.

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