• Spectral transmission curve with a peak at around 400 nm on a graph.
  • Blue bandpass filter with black rim on a white background
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BP450-30 Bandpass Filter(CWL=450nm,FWHM=30nm)

BP450-30 Bandpass Filter(CWL=450nm,FWHM=30nm)

PartNumber:SO3010156

$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: Center wavelength at 450nm for precise spectral targeting in the violet-blue region
  • Spectral Features: Full Width Half Maximum (FWHM) of 30nm providing optimal bandwidth for violet and blue machine vision 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
  • BP450-30 Bandpass Filter - Fluorescence Microscopy & Bio-Imaging (Excitation Filter)

    BP450-30 Bandpass Filter - Fluorescence Microscopy & Bio-Imaging (Excitation Filter)

    Fluorescence Microscopy & Bio-Imaging (Excitation Filter)

    This is the most likely application given the high blocking (OD6) and transmission specs. The filter is used to "clean up" the excitation light before it hits a biological sample.

    • Application: Exciting blue-absorbing fluorophores in fluorescence microscopy or flow cytometry. It isolates the specific blue wavelengths needed to make a sample fluoresce green.
    • Target Fluorophores: Suitable for exciting dyes and proteins such as Auramine O, Acridine Orange, EGFP (on the absorption shoulder), and various auto-fluorescent compounds (like chlorophyll or collagen).

    Recommended Light Sources

    • High-Power Blue LEDs: specifically those with a peak output around 440 nm – 450 nm.
    • Broadband Sources: Mercury (Hg) Arc Lamps or Xenon Arc Lamps (the filter effectively blocks the intense UV and green/red bands from these lamps, passing only the blue excitation energy).
  • BP450-30 Bandpass Filter - Laser Line "Clean-up" (Blue Diode Lasers)

    BP450-30 Bandpass Filter - Laser Line "Clean-up" (Blue Diode Lasers)

    Laser Line "Clean-up" (Blue Diode Lasers)

    The 450 nm wavelength is a standard for high-power blue diode lasers.

    • Application: Cleaning up the spectral output of a blue laser. Diode lasers often have "spectral wings" or spontaneous emission noise outside their peak. This filter ensures only the pure 450 nm laser line reaches the target, which is critical for precise interferometry, holography, or Raman spectroscopy excitation.

    Recommended Light Sources

    • 450 nm Blue Diode Lasers (commonly used in engraving, welding, and display technology).

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?