• Graph showing the transmission verses wavelength for a bandpass filter with a central wavelength of 435nm and a bandwidth of 20nm.
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BP435-20 Bandpass Filter(CWL=435nm,FWHM=20nm)

BP435-20 Bandpass Filter(CWL=435nm,FWHM=20nm)

PN:SO3010142

$55.00 USD
$55.00 USD
Sale Sold out
Shipping calculated at checkout.
Center Wavelength (CWL) // FWHM
Optical Density // Peak Transmission (Tpk)
Dimension

Precision Bandpass Filter for Advanced Optical Applications

The BP435-20 is a high-performance bandpass filter engineered for demanding applications in fluorescence microscopy, spectroscopy, and optical instrumentation. With a center wavelength of 435nm and 20nm FWHM, this filter delivers exceptional spectral precision in the violet-blue region of the spectrum.

Key Features:

  • Precise Spectral Control: 435nm center wavelength with 20nm full width at half maximum (FWHM)
  • Superior Optical Density: OD5 blocking performance for maximum contrast and signal-to-noise ratio
  • Professional Grade Construction: Multi-layer interference coating ensures durability and consistent performance
  • Versatile Applications: Optimized for both excitation and emission filtering in various optical systems

Primary Applications:

Fluorescence Microscopy:

  • CFP (Cyan Fluorescent Protein) excitation at 435nm
  • Violet laser line filtering for confocal microscopy
  • Live cell imaging and fluorescence analysis
  • Multi-color fluorescence experiments

Spectroscopic Applications:

  • Mercury line filtering (435.8nm Hg line)
  • Atomic emission spectroscopy
  • Photometric measurements
  • Calibration and reference standards

Industrial & Research:

  • Machine vision systems requiring violet-blue filtering
  • Quality control and inspection applications
  • Custom optical instrument integration
  • Photochemistry and photobiology research

Technical Specifications:

  • Center Wavelength (CWL): 435nm
  • Full Width Half Maximum (FWHM): 20nm
  • Optical Density: OD5
  • Wavelength Range: Violet-blue spectrum
  • High transmission efficiency in passband
  • Excellent out-of-band rejection

Designed for researchers and professionals who require reliable optical performance, the BP435-20 provides consistent results in critical applications. Each filter undergoes stringent quality control testing to ensure it meets the demanding specifications required for scientific and industrial use.

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)