• A plot showing the transmission of a bandpass filter with a central wavelength (CWL) of 400nm and a bandwidth (FWHM) of 30nm. The x-axis represents the wavelength in nanometers, and the y-axis represents the transmission value.
  • A plot showing the transmission of a bandpass filter with a central wavelength (CWL) of 400nm and a bandwidth (FWHM) of 30nm. The x-axis represents the wavelength in nanometers, and the y-axis represents the transmission value.
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BP400-30 Bandpass Filter(CWL=400nm,FWHM=30nm)

BP400-30 Bandpass Filter(CWL=400nm,FWHM=30nm)

PN:SO3010111

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

Precision Violet-UV Boundary Filtering

The BP400-30 Bandpass Filter delivers exceptional performance at the critical 400nm wavelength with FWHM of 30nm, positioned at the boundary between visible violet and UV-A spectrum. Engineered for applications requiring precise wavelength selection in this unique spectral region where both visible and UV properties are essential.

Technical Specifications

  • Center Wavelength: 400nm (violet-UV boundary)
  • Enhanced Selectivity: 30nm FWHM for improved spectral discrimination
  • High Transmission: Superior light throughput at 400nm
  • Sharp Cut-off: Excellent spectral isolation for clean measurements
  • Dual-Region Performance: Optimized for violet-UV boundary applications

Specialized Applications

Perfect for fluorescence microscopy with violet dyes, UV-visible spectroscopy, photolithography, and semiconductor inspection. Ideal for applications requiring precise 400nm wavelength control, laser systems, analytical instrumentation, and research where the violet-UV boundary is critical.

Unique Spectral Position

The 400nm wavelength offers unique advantages at the violet-UV boundary, providing access to both visible detection capabilities and UV excitation properties. The 30nm bandwidth ensures enhanced spectral selectivity while maintaining good signal collection for demanding analytical applications.

Professional Quality

Manufactured with advanced optical coatings designed for consistent performance across the violet-UV transition. Each filter undergoes rigorous quality testing to ensure reliable performance in demanding research, analytical, and industrial applications requiring precise 400nm filtering.

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)