• Graph showing the transmission rate of a longpass filter against wavelength, with a cut-on wavelength of 420nm and a transmission range above 85% from 430 to 1100nm.
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LP420 Longpass Filter (T>85%@430-1100nm, OD5@200-410nm)

LP420 Longpass Filter (T>85%@430-1100nm, OD5@200-410nm)

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

Professional LP420 Longpass Filter - Blue-Violet to Near-Infrared Optical Filtering

The LP420 Longpass Filter is engineered for demanding blue-violet to near-infrared applications requiring precise wavelength separation at 420nm. With reliable 85% transmission efficiency and superior OD5 blocking, this filter delivers exceptional performance for advanced optical systems across a broad spectral range up to 1100nm.

Technical Specifications:

  • Cut-on Wavelength: 420nm (T=50%)
  • Good Transmission: T>85% @ 430-1100nm
  • Superior Blocking: OD5 @ 200-410nm

Key Applications:

  • Blue-Violet Fluorescence Imaging: Perfect for blue fluorophore detection and imaging
  • Confocal Microscopy: Ideal for multi-color imaging with blue excitation
  • Flow Cytometry: Optimal for blue fluorescent protein analysis
  • Live Cell Imaging: Excellent for cellular process monitoring with minimal phototoxicity
  • Laser Applications: Effective filtering for 405nm and blue laser systems
  • Material Analysis: Perfect for polymer and pharmaceutical characterization

Performance Features:

  • Sharp transition edge for precise 420nm cutoff
  • Reliable 85% transmission minimizes signal loss
  • OD5 blocking provides excellent background suppression
  • Broad spectral range from blue-violet to near-infrared (430-1100nm)
  • Consistent performance across entire filter aperture
  • Low autofluorescence for sensitive detection
  • Stable performance under intense illumination

Technical Advantages:

  • Broad Range: Wide transmission window from 430nm to 1100nm
  • Superior Blocking: OD5 performance ensures excellent rejection of unwanted wavelengths
  • Research Grade: Professional quality for scientific applications
  • Blue Light Optimized: Specifically designed for blue-violet light applications

Application Areas:

  • Life Sciences: Blue fluorescence imaging and protein detection
  • Cell Biology: Live cell imaging and cellular process monitoring
  • Industrial Inspection: Quality control and material analysis
  • Research: Advanced optical characterization studies

Quality & Reliability:

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

Perfect for: Blue-violet fluorescence microscopy, multi-color imaging, laser applications, and optical systems requiring reliable blue-violet to near-infrared filtering with broad transmission range and excellent UV 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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