• A plot showing the transmission percentage on the y-axis against wavelength in nanometers on the x-axis, for a bandpass filter with a central wavelength of 615nm and a full width at half maximum of 8nm.
  • A plot showing the transmission percentage on the y-axis against wavelength in nanometers on the x-axis, for a bandpass filter with a central wavelength of 615nm and a full width at half maximum of 8nm.
  • Orange bandpass filter with black frame on a white background
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BP615-8 Bandpass Filter(CWL=615nm,FWHM=8nm)

BP615-8 Bandpass Filter(CWL=615nm,FWHM=8nm)

PartNumber:SO3010360

$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.
  • Wavelength: Center wavelength at 615nm for precise spectral targeting in the orange-red region
  • Spectral Features: Full Width Half Maximum (FWHM) of 8nm providing ultra-narrow bandwidth for high-resolution spectroscopy and precision applications
  • Optical Density: OD6 blocking for exceptional out-of-band rejection and superior signal isolation
  • Filter Dimension Availability: Multiple sizes available to fit standard optical systems and custom configurations

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
  • BP615-8 Bandpass Filter - Time-Resolved Fluorescence (TRF) & AlphaLISA

    BP615-8 Bandpass Filter - Time-Resolved Fluorescence (TRF) & AlphaLISA

    Time-Resolved Fluorescence (TRF) & AlphaLISA

    The primary application for a BP615-8 with OD6 blocking is the detection of Lanthanide luminescence, specifically Europium chelates.

    • Context: Europium (Eu³⁺) is a popular fluorophore used in "Time-Resolved Fluorescence" (TRF) and assays like AlphaLISA or DELFIA. Unlike standard fluorophores, Europium has a very long fluorescence lifetime and a sharp, "atomic-like" emission peak centered at 615 nm (the ⁵D₀ → ⁷F₂ transition).
    • Function: The filter isolates this narrow 615 nm peak while blocking the excitation light (which is usually in the UV or deep red) and background autofluorescence (OD6 blocking is critical here to ensure a high Signal-to-Noise ratio).
    • Result: High-sensitivity detection of biological analytes (hormones, enzymes, cytokines) in drug discovery and clinical diagnostics.

    Recommended Light Sources

    Below are the recommended light sources depending on the specific assay type (Direct Europium excitation vs. AlphaLISA).

    • Xenon Flash Lamp: High-Intensity UV Excitation (TRF): Europium has strong absorption bands in the UV range (around 320–340 nm). A Xenon flash lamp provides a high-intensity, broad-spectrum pulse that covers this UV region effectively. It is the standard standard source for TRF plate readers because the "flash" capability allows the system to wait (delay) before measuring, removing short-lived background noise while the long-lived Europium signal (615 nm) persists.
    • 680nm Laser Diode: AlphaLISA Excitation: In AlphaLISA assays, the "Donor beads" are excited at 680 nm (Deep Red), causing a chemical reaction that eventually releases light at 615 nm from the "Acceptor beads." A 680 nm laser is required to penetrate the sample and excite the donor beads without directly exciting the acceptor beads or biological background. The BP615-8 filter then blocks the massive amount of 680 nm laser light (OD6 blocking is essential here) and passes only the 615 nm signal.
    • UV LED (365nm or 340nm): Compact Eu³⁺ Excitation: For portable or compact fluorescence microscopes, a high-power UV LED (specifically 365 nm) can excite Europium chelates. While less intense than a Xenon lamp, LEDs offer a longer lifespan, lower heat, and instant on/off switching, which is advantageous for rapid automated inspection systems.

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(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

Need any help?