• Graph showing the transmission verses wavelength for a bandpass filter with a central wavelength of 812.5nm and a FWHM of 4nm.
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BP812.5-4 Bandpass Filter(CWL=812.5nm,FWHM=4nm)

BP812.5-4 Bandpass Filter(CWL=812.5nm,FWHM=4nm)

PN:SO3010574

$130.00 USD
$130.00 USD
Sale Sold out
Shipping calculated at checkout.
Center Wavelength (CWL) // FWHM
Optical Density // Peak Transmission (Tpk)
Dimension

Ultra-Narrow NIR Bandpass Filter for Maximum Precision

The BP812.5-4 Bandpass Filter delivers unparalleled spectral selectivity for the most demanding near-infrared applications at 812.5nm. With its ultra-narrow 4nm bandwidth, this filter provides exceptional wavelength discrimination and superior signal purity, making it the ultimate choice for applications requiring the highest level of spectral precision and minimal interference.

Technical Excellence:

  • Center Wavelength (CWL): 812.5nm - precisely tuned for ultra-specific NIR applications
  • Full Width Half Maximum (FWHM): 4nm ultra-narrow bandwidth for maximum selectivity
  • Exceptional Blocking: Outstanding out-of-band rejection for pristine signals
  • High Transmission: Optimized passband efficiency despite narrow bandwidth
  • Ultra-Precision Manufacturing: Extreme tolerance control for consistent performance

Specialized Applications:

  • Ultra-high-resolution spectroscopy and chemical analysis
  • Precision laser line filtering and beam cleanup
  • Advanced scientific research instrumentation
  • Single-line detection and monitoring systems
  • High-precision analytical measurements
  • Specialized biomedical diagnostics
  • Critical wavelength isolation applications

Performance Advantages:

  • Ultimate Selectivity: Ultra-narrow bandwidth eliminates virtually all spectral interference
  • Signal Purity: Exceptional blocking ensures the cleanest possible measurements
  • Precision Control: Ideal for applications requiring exact wavelength isolation
  • Research Grade: Exceeds the most demanding requirements of scientific instrumentation
  • Stable Performance: Consistent optical characteristics under all conditions

SyronOptics Ultra-Precision Engineering: Each BP812.5-4 filter represents the pinnacle of our manufacturing capabilities, utilizing the most advanced thin-film deposition technology with multiple ultra-precision controlled layers. Our most rigorous quality control process includes comprehensive spectral testing to ensure every filter meets the most exacting specifications required for ultra-high-precision optical applications.

The premium choice for researchers, optical engineers, and system designers who demand the absolute highest level of spectral selectivity and signal purity in their NIR optical systems operating at 812.5nm.

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)