• A plot of a bandpass filter with a central wavelength of 266nm and a width of 10nm, labeled as BP266-10.
  • Black bandpass filter with technical specifications on a white background
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BP266-10 Bandpass Filter(CWL=266nm,FWHM=10nm)

BP266-10 Bandpass Filter(CWL=266nm,FWHM=10nm)

PartNumber:SO3010062

$60.00 USD
$60.00 USD
Sale Sold out
Shipping calculated at checkout.

Center Wavelength (CWL) // FWHM
Optical Density // Peak Transmission (Tpk)
Dimension

In Stock.

Ships within 5 working days of order. Customs handling including. (DDP)

Net 30 payment terms for organizational purchase orders.

Email shop@syronoptics.com For Customization Options

  • Wavelength: Center wavelength 266nm with 10nm FWHM bandwidth for narrow-band deep UV spectrum transmission
  • Spectral Features: Ultra-narrow bandwidth with steep edge transitions for precise deep UV spectral isolation
  • Optical Density: OD3+ blocking outside passband for strong background suppression
  • Filter Dimension Availability: Available in standard round and square formats to fit common optical mounts

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.

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.

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.

View full details
  • BP266-10 Bandpass Filter - Deep UV Fluorescence and Spectroscopy

    BP266-10 Bandpass Filter - Deep UV Fluorescence and Spectroscopy

    Deep UV Fluorescence and Spectroscopy

    Scientists use short-wave UV light to make chemicals, proteins, or biological samples "glow" (fluoresce) to identify what they are made of. Because this filter blocks 99.9% of other light (OD3) and only lets a narrow band of 266nm light through, it acts like a strict shield. It prevents normal room light or the machine's internal glare from blinding the sensitive cameras used to look at the glowing samples.

    Recommended light source:

    • 266nm Solid-State Laser (Nd:YAG): This is the industry standard because it provides a very powerful, highly focused beam. Since this filter only lets 20% of the light pass through (T=20%), you need a strong starting light like a laser to ensure enough light reaches the sample.
    • Deep UV LED (265nm-266nm): These are much smaller, cheaper, and run cooler than lasers. They are perfect for compact, portable lab equipment where you don't need the extreme, blinding power of a laser.
  • BP266-10 Bandpass Filter - Semiconductor and Microchip Inspection

    BP266-10 Bandpass Filter - Semiconductor and Microchip Inspection

    Semiconductor and Microchip Inspection

    Microchips are built on shiny silicon discs. To find microscopic dust or tiny scratches during manufacturing, engineers shine UV light on them. Because 266nm UV light has very short waves, it bounces off tiny defects that normal light would completely miss. This filter is placed over the inspection camera so it only sees the specific UV reflection and isn't distracted by the bright factory lights.

    Recommended light source:

    • 266nm Diode-Pumped Solid State (DPSS) Laser: It creates a perfectly clean, intense beam that can easily spot microscopic particles on the incredibly shiny surface of a silicon wafer.
    • Xenon Arc Lamp: This lamp creates a very bright, broad spectrum of light (like a high-tech flashlight). When you put this filter in front of it, it successfully strips away all the visible light and isolates just the 266nm UV light needed for the inspection, which is cheaper than buying a specialized laser.

Fequently Asked Questions

Will this filter work at an angle?

This filter is optimized for near normal incidence. At larger angles, the center wavelength may shift, which can affect performance. If your system operates at an angle, we recommend validating with a sample.

Can I stack this filter with other filters?

Yes, filters can be stacked to achieve additional blocking or spectral shaping. However, stacking may introduce reflection losses and should be tested in your system.

Can I request a custom wavelength or size?

Yes, we support custom center wavelength (CWL), bandwidth (FWHM), dimensions, and mounting options. Contact us with your requirements for recommendations.

What is the difference between mounted and unmounted filters?

Unmounted filters are bare optics suitable if you already have a holder. Mounted filters come in an anodized aluminum ring (with or without threading) for easier system integration.

  • dia12.5mm(mounted)

    Clear Aperture:

    dia9mm

    Mounting Thickness:

    3.5mm

    Internal/External Thread:

    n.a/n.a

  • dia12.5mm(unmounted)

    Clear Aperture:

    >90%

    Mounting Thickness:

    n.a

    Internal/External Thread:

    n.a/n.a

  • dia25mm(mounted)

    Clear Aperture:

    dia21mm

    Mounting Thickness:

    3.5mm

    Internal/External Thread:

    n.a/n.a

  • dia25mm(unmounted)

    Clear Aperture:

    >90%

    Mounting Thickness:

    n.a

    Internal/External Thread:

    n.a/n.a

  • SM05(0.535″-40TPI)

    Clear Aperture:

    dia9mm

    Mounting Thickness:

    7.62mm

    Internal/External Thread:

    SM05/SM05

  • SM1(1.035″-40TPI)

    Clear Aperture:

    dia21mm

    Mounting Thickness:

    7.62mm

    Internal/External Thread:

    SM1/SM1

  • C-Mount(1″-32TPI)

    Clear Aperture:

    dia21mm

    Mounting Thickness:

    Internal/External Thread:

    C-Mount/C-Mount

Not sure if this filter fits your system?

We can help you choose the right filter based on your wavelength, light source, and setup.