• Graph of transmission vs wavelength for a CWL625-25nm, OD5, Bandpass Filter
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BP685-140 Bandpass Filter(CWL=685nm,FWHM=140nm)

BP685-140 Bandpass Filter(CWL=685nm,FWHM=140nm)

PN:SO3014195

$50.00 USD
$50.00 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 685nm with 140nm FWHM for broadband red/NIR spectral range (615-755nm)
  • Spectral Features: High transmission with broadband coverage optimized for multi-fluorophore imaging, phototherapy, and wide-spectrum applications
  • Optical Density: OD>6 blocking ensures exceptional out-of-band rejection and signal isolation for precision applications
  • Filter Dimension Availability: Available in multiple unmounted and mounted configurations for flexible integration

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. For custom cut size, contact shop@syronoptics.com when ordering.

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.

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    Fequently Asked Questions

    What are the Thickness of the Optical Filters?

    For standard mounting (mounted,non-thread):

    • 3.5mm (by default)
    • 6mm (by request)

    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:

    • 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.

    • dia12.5mm(unmounted)

      Clear Aperture:

      >90%

      Mounting Thickness:

      n.a

      Internal/External Thread:

      n.a/n.a

    • dia12.5mm(mounted)

      Clear Aperture:

      dia9mm

      Mounting Thickness:

      3.5mm

      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

    • M25.5x0.5mm(mounted)

      Clear Aperture:

      dia20.5mm

      Mounting Thickness:

      6.5mm

      Internal/External Thread:

      M25.5x0.5mm/M25.5x0.5mm

    • M27x0.5mm(mounted)

      Clear Aperture:

      dia22mm

      Mounting Thickness:

      6.5mm

      Internal/External Thread:

      M27x0.5mm/M27x0.5mm

    • M30.5x0.5mm(mounted)

      Clear Aperture:

      dia25.5mm

      Mounting Thickness:

      6.5mm

      Internal/External Thread:

      M30.5x0.5mm/M30.5x0.5mm

    • M34x0.5mm(mounted)

      Clear Aperture:

      dia29mm

      Mounting Thickness:

      6.5mm

      Internal/External Thread:

      M34x0.5mm/M34x0.5mm

    • M35.5x0.5mm(mounted)

      Clear Aperture:

      dia30.5mm

      Mounting Thickness:

      6.5mm

      Internal/External Thread:

      M35.5x0.5mm/M35.5x0.5mm

    • M37x0.5mm(mounted)

      Clear Aperture:

      dia32mm

      Mounting Thickness:

      6.5mm

      Internal/External Thread:

      M37x0.5mm/M37x0.5mm

    • M52x0.75mm(mounted)

      Clear Aperture:

      dia47mm

      Mounting Thickness:

      6.5mm

      Internal/External Thread:

      M52x0.75mm/M52x0.75mm

    • M55x0.75mm(mounted)

      Clear Aperture:

      dia50mm

      Mounting Thickness:

      6.5mm

      Internal/External Thread:

      M55x0.75mm/M55x0.75mm

    • dia27mm(unmounted)

      Clear Aperture:

      >90%

      Mounting Thickness:

      n.a

      Internal/External Thread:

      n.a/n.a

    • dia34mm(unmounted)

      Clear Aperture:

      >90%

      Mounting Thickness:

      n.a

      Internal/External Thread:

      n.a/n.a

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