• A graph showing the transmission of a bandpass filter with a central wavelength of 420nm and a bandwidth of 30nm.
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BP420-30 Bandpass Filter(CWL=420nm,FWHM=30nm)

BP420-30 Bandpass Filter(CWL=420nm,FWHM=30nm)

PN:SO3010755

$50.00 USD
$50.00 USD
Sale Sold out
Shipping calculated at checkout.
Center Wavelength (CWL) // FWHM
Optical Density // Peak Transmission (Tpk)
Dimension

High-Performance Violet-Blue Bandpass Filter

The BP420-30 Bandpass Filter delivers exceptional optical performance for violet-blue light applications requiring precise wavelength control. With a center wavelength of 420nm and narrow 30nm FWHM, this filter provides superior spectral selectivity for fluorescence microscopy, UV imaging, and advanced spectroscopy applications.

Technical Specifications:

  • Center Wavelength: 420nm ± 2nm precision
  • Full Width Half Maximum (FWHM): 30nm for excellent spectral resolution
  • Peak Transmission: >90% in passband region
  • Out-of-Band Blocking: OD4+ rejection for superior contrast
  • Surface Quality: 40-20 scratch-dig specification
  • Coating: Hard ion-beam sputtered for UV durability

Key Applications:

Engineered for fluorescence microscopy, UV spectroscopy, flow cytometry, and machine vision systems. The 420nm wavelength is particularly valuable for DAPI detection, violet fluorescent protein imaging, and applications requiring precise violet-blue light transmission with minimal UV interference.

Performance Benefits:

The narrow 30nm bandwidth provides exceptional spectral purity, making it ideal for applications requiring minimal spectral crosstalk and maximum signal-to-noise ratios. Perfect for multi-channel fluorescence systems where precise wavelength separation in the violet-blue region is critical.

Quality & Reliability:

Manufactured using advanced thin-film deposition technology with stringent quality control. Each filter undergoes comprehensive testing to ensure consistent performance, UV stability, and reliable operation in demanding research and industrial environments.

Trust the precision that UV and fluorescence professionals rely on. The BP420-30 delivers the spectral control your most demanding violet-blue light applications require.

Transmission & OD Data

The transmission curve is typical. Actual data may vary from lot to lot, you can request the raw Transmission and OD data from us.

Copy the link of the product page and send email to shop@syronoptics.com to get raw data.

Shipment & Delivery

For stocked products, shipment will usually be made within 5 working days after order.

For customized products, shipment will usually be made within 4-8 weeks after order.

Return & Refund

Stocked Product are eligible to return within 7 days after receiving.

A flat rate of 35$ will be charged for returning.

Custom Sizing

Custom sizing is available for dimension under 60x60mm. Without mounting the thickness will generally ranging from 0.5-3mm.

For bigger size, contact shop@syronoptics.com for details.

Optical dicing refers to precision cutting processes used to segment optical materials, particularly those with specialized coatings, into smaller functional components while maintaining their structural and optical integrity. In the context of optical coating flats (flat substrates like glass, fused silica, or semiconductors coated with anti-reflective, dielectric, or other optical layers), dicing ensures these coated substrates meet exact dimensional requirements for applications in photonics, lasers, sensors, and semiconductor devices.

Methods

  • Saw Dicing: Diamond-coated blades for clean cuts with minimal chipping.
  • Laser Dicing: Non-contact ablation for delicate or brittle materials, reducing mechanical stress.
  • Plasma Dicing: Dry etching for ultra-fine features, ideal for advanced semiconductor wafers.

Price

Dicing Service will generally cost from $50 to $125 per piece. Depending on the accuracy and size you are requesting.

Packaging

If you need generic packaging, please leave "Generic" in the note when placing order.

In such case:

  • No Branding information in Packaging Materials
  • All Documentation will be generic
  • We will send image of the parcel to you before fulfilling shipment
  • You can use your document template for the shipment.

Feel free to contact shop@syronoptics.com for details.

Payment

Payment could be done online with Credit Card, Apple Pay, Google Pay, Wechat Pay and Alipay

For amount under $200 you can request to make payment within 7days after receiving the order.

View full details

Fequently Asked Questions

What are the Thickness of the Optical Filters?

For Mounted Optics:

  • 6mm (by Default)
  • 3.5mm (Specified in Order Note)

For Unmounted Optics:

  • 0.5mm
  • 1.1mm
  • 2mm

(most of the unmounted optics are having thickness of 1.1mm ~ 2mm)

What is the difference between 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 (Usually Thorlabs):

  • 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.

Standard Mountings

Camera Mounting List

  • Our filters can be cut to match the mounting on the list. Please contact us for getting quotation.

Need any help?

Other Wavelength

UV Bandpass Filter (100-400nm)

VIS Bandpass Filter (400-800nm)

NIR Bandpass Filter (800-1400nm)