• A graph showing the transmission of a bandpass filter with wavelength on the x-axis and transmission on the y-axis, indicating a peak transmission at approximately 518nm with a FWHM of 10nm.
  • Green bandpass filter with black rim on a white background
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BP518-10 Bandpass Filter(CWL=518nm,FWHM=10nm)

BP518-10 Bandpass Filter(CWL=518nm,FWHM=10nm)

PartNumber:SO3010841

$55.00 USD
$55.00 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.
  • Wavelength: 518nm center wavelength (CWL) for cyan-green visible light applications
  • Spectral Features: Ultra-narrow 10nm FWHM bandwidth with high transmission and steep edge slopes
  • Optical Density: OD6 blocking for superior out-of-band rejection
  • Filter Dimension Availability: Multiple mounting diameters available to fit standard optical systems

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
  • BP518-10 Bandpass Filter - Argon Ion Laser Line Selection

    BP518-10 Bandpass Filter - Argon Ion Laser Line Selection

    Argon Ion Laser Line Selection

    The most distinct application for a filter with a 518 nm center and a narrow 10 nm bandwidth is the isolation of the 514.5 nm emission line from an Argon Ion laser.

    • Function: Argon ion lasers emit multiple wavelengths, primarily at 488 nm (blue) and 514.5 nm (green). This filter is designed to pass the 514.5 nm line while blocking the 488 nm line and removing the background plasma glow (spontaneous emission).
    • Specific Use Cases:Raman Spectroscopy: Cleaning up the laser excitation source to ensure only the 514.5 nm light hits the sample, preventing false signals from plasma lines.Flow Cytometry: Selecting the green excitation line for fluorophores that require ~514 nm excitation.Holography: Isolating a single coherence length for recording holograms.

    Recommended Light Sources

    • Argon Ion Laser: This source emits a strong 514.5 nm line that falls perfectly within the filter's passband, allowing the filter to effectively block the competing 488 nm blue line and plasma glow to ensure pure green excitation.
  • BP518-10 Bandpass Filter - Fluorescence Imaging

    BP518-10 Bandpass Filter - Fluorescence Imaging

    Fluorescence Imaging

    This filter can serve as an Excitation Filter or a specific Emission Filter in fluorescence microscopy.

    • As an Emission Filter: It would capture fluorescence emission in the cyan/green gap (513–523 nm). This is useful for analyzing specific fluorophores with narrow emission peaks in this region, potentially isolating them from slightly longer-wavelength green fluorophores (like GFP, which peaks around 509–515 nm, though this filter cuts off the tail).
    • As an Excitation Filter: It can clean up a broadband light source to provide narrow excitation light centered at 518 nm.

    Recommended Light Sources

    • Broadband Light Source (e.g., Arc Lamp or White LED): The filter allows for the isolation of a precise, narrow excitation band centered at 518 nm from a wide-spectrum source, eliminating out-of-band noise to target specific fluorophores.

Fequently Asked Questions

Different Types of Filter Mountings

Unmounted:

  • a bare glass optical filter

Mounted:

  • Smooth Mount for protection of the optics. No thread is there on the mount.

Metric Mount:

  • Start with M as prefix, usually seens as M25.5x0.5mm. Mostly used as camera filters

Imperial Mount:

  • Start with SM as prefix, usually seen SM1, SM05 etc... Mostly used in Optical system. (You will have a SM external thread to connecting to other objects)

C-Mount:

  • Very frequently used mounting. C-Mount is 1‘’-32TPI. And it is not the same thing as SM1, or M25.5x0.5mm.

What are the Thickness of the Optical Filters?

For Unmounted Optics:

  • 0.5mm
  • 1.1mm
  • 2.0mm

*Most of our optics are coming with 1.1mm and 2.0mm

With Standard Mounting (Mounted, No Thread):

  • 3.5mm (Default)
  • 6mm (Upon Request)

Thread Mounted:

  • 6mm - 8mm

  • dia12.5mm(unmounted)

    Clear Aperture:

    >90%

    Mounting Thickness:

    n.a

    Internal/External Thread:

    n.a/n.a

  • dia12.5mm(mounted)

    Clear Aperture:

    dia9mm

    Mounting Thickness:

    3.5mm

    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

  • M25.5x0.5mm(mounted)

    Clear Aperture:

    dia20.5mm

    Mounting Thickness:

    6.5mm

    Internal/External Thread:

    M25.5x0.5mm/M25.5x0.5mm

  • M27x0.5mm(mounted)

    Clear Aperture:

    dia22mm

    Mounting Thickness:

    6.5mm

    Internal/External Thread:

    M27x0.5mm/M27x0.5mm

  • M30.5x0.5mm(mounted)

    Clear Aperture:

    dia25.5mm

    Mounting Thickness:

    6.5mm

    Internal/External Thread:

    M30.5x0.5mm/M30.5x0.5mm

  • M34x0.5mm(mounted)

    Clear Aperture:

    dia29mm

    Mounting Thickness:

    6.5mm

    Internal/External Thread:

    M34x0.5mm/M34x0.5mm

  • M35.5x0.5mm(mounted)

    Clear Aperture:

    dia30.5mm

    Mounting Thickness:

    6.5mm

    Internal/External Thread:

    M35.5x0.5mm/M35.5x0.5mm

  • M37x0.5mm(mounted)

    Clear Aperture:

    dia32mm

    Mounting Thickness:

    6.5mm

    Internal/External Thread:

    M37x0.5mm/M37x0.5mm

  • M52x0.75mm(mounted)

    Clear Aperture:

    dia47mm

    Mounting Thickness:

    6.5mm

    Internal/External Thread:

    M52x0.75mm/M52x0.75mm

  • M55x0.75mm(mounted)

    Clear Aperture:

    dia50mm

    Mounting Thickness:

    6.5mm

    Internal/External Thread:

    M55x0.75mm/M55x0.75mm

  • dia27mm(unmounted)

    Clear Aperture:

    >90%

    Mounting Thickness:

    n.a

    Internal/External Thread:

    n.a/n.a

  • dia34mm(unmounted)

    Clear Aperture:

    >90%

    Mounting Thickness:

    n.a

    Internal/External Thread:

    n.a/n.a

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