• Graph showing the transmission percentage on the y-axis against wavelength on the x-axis for a LP425 Longpass Filter, indicating a cut-on wavelength of 425nm and blocking range.
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LP425 Longpass Filter (T>90%@435-1100nm, OD6@200-420nm)

LP425 Longpass Filter (T>90%@435-1100nm, OD6@200-420nm)

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

In Stock.

Ships within 5 working days of order.
  • Wavelength: LP425 longpass filter optimized for blue to NIR applications from 435-1100nm
  • Spectral Features: Sharp cut-on at 425nm with >90% transmission above 435nm for superior signal clarity
  • Optical Density: OD6 blocking from 200-420nm ensures exceptional rejection of UV and violet wavelengths
  • Filter Dimension Availability: Multiple sizes available – contact us for custom dimensions and mounting options

Request Raw Data

You can request the raw transmission data from us.

Copy the link of the product page and send email to shop@syronoptics.com, you will get reply within 1 working days.

Shipment & Delivery

  • Stocked products ship within 5 business days after order confirmation.
  • Custom-made products typically ship within 4–8 weeks.
  • Delivery times may be affected by holidays, customs clearance, or other unforeseen events.
  • Tracking information becomes available 3–5 days after dispatch when the parcel is handed to the local courier.
  • Some deliveries may require customer pickup. Please ensure your contact information is correct and respond promptly to courier communications.
  • General international parcel shipping cost: USD 35 (for reference).

Return & Refund

1. Eligible Products

Stocked (catalog) products with a unit price under USD 500 are eligible for return within 14 days after delivery.

Custom-made or non-stock items are not eligible for no-reason returns.

2. No-Reason Return (Buyer’s Remorse)

If you wish to return an item for reasons other than product defect or seller error:

  • Please email shop@syronoptics.com to request a return authorization and return address.
  • Buyer is responsible for all return shipping costs.
  • Items must be unused, in original condition, and with original packaging.
  • Refund will be issued after inspection of the returned item.

3. Seller’s Fault (Defective / Wrong / Damaged Item)

If the return is due to seller error (defective product, wrong item shipped, or damage during shipping):

Please provide clear evidence (photos or videos) showing the issue.

We will evaluate the case and either:

  • Provide a replacement, or
    Issue a refund (with or without requiring the item to be returned).
  • Return shipping cost will be covered by the seller in confirmed seller-fault cases.

4. Important Notes

  • Returned items are subject to inspection before refund approval.
  • Shipping fees, customs duties, and taxes are non-refundable unless the return is due to seller fault.
  • Unauthorized returns will not be accepted.

Payment Terms

Payments can be made online using Credit Card, Apple Pay, Google Pay, WeChat Pay, and Alipay.

If you prefer to pay by bank transfer, please contact shop@syronoptics.com to request an invoice with our banking details.

If you require deferred payment terms, you may request NET 7 or NET 30 at the time of placing your order.

All requests for deferred payment are subject to approval and will be confirmed by SyronOptics via email.

Custom Sizing

Custom sizing is available from 3 × 3 mm (or Ø5 mm) up to 60 × 60 mm. For custom cut sizes, please contact shop@syronoptics.com for a quotation.

Pricing is not significantly lower for small-size orders in low quantities due to operational costs.

lp360-d12.5

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  • LP425 Longpass Filter - Machine Vision & Photography

    LP425 Longpass Filter - Machine Vision & Photography

    Machine Vision & Photography

    • Function: UV Blocking and Haze Reduction.
    • Mechanism: Blocks UV light that can cause chromatic aberration or "haze" in lenses. It creates higher contrast in outdoor imaging or when inspecting materials that fluoresce under UV light (e.g., checking for glue, grease, or security inks).

    Recommended Light Sources

    • UV LEDs (Narrowband): These sources emit high-energy "invisible" (or near-invisible) light that excites the fluorophores in glue, grease, or security inks, causing them to glow in the visible spectrum (e.g., green/yellow).
    • Sunlight (outdoor imaging) or High-CRI White LEDs: In general photography, UV light scatters easily (Rayleigh scattering), causing distant objects to look "hazy" or washed out.
  • LP425 Longpass Filter - Laser Safety & Cleanup

    LP425 Longpass Filter - Laser Safety & Cleanup

    Laser Safety & Cleanup

    • Function: Blocks specific laser lines.
    • Mechanism: Safely blocks 405nm diode lasers while allowing the rest of the visible spectrum to pass, which is useful for observation windows or sensor protection.

    Recommended Light Sources

    • 405 nm Laser Diode: The LP425 filter is specifically engineered to have its cut-off point just above 405 nm. This ensures that the high-intensity laser light is attenuated by a factor of 1,000,000 (OD6), protecting user eyes or sensitive sensors from damage.
    • UV Lasers (e.g., 355 nm, 375 nm): Since the blocking range extends down to 200 nm, this filter is also highly effective for safety applications involving UV lasers, blocking the harmful radiation while allowing visible light (for observation) to pass through.

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