Bandpass Filter by Wavelength

Bandpass Filter by Bandwidth

Bandpass Filter by Applications

Bandpass Filter by Lightsources

Frequently Asked Questions

How can I find Bandpass Filter needed?

You can search as below example:

  • BP405-10
    (BP with cwl=405,fwhm=10nm)
  • BP405-
    (find BP with CWL=405nm)

The search query is available on our website and Google

Angle of Incidence for Bandpass Filter

Usually Bandpass filter should be used at AOI=0° (±3°)

Specially designed bandpass filter can be used at variable AOI (15~30°)

Learn More about CWL shift due to AOI changes:

https://syronoptics.com/blogs/tools/aoi-cwl-shift-calculator

What's the Sizes of Filter?

For most of the product, we can offer custom cut within size of :

  • 60x60mm
  • dia12.5mm
  • dia25mm

For narrow band filter, we can offer:

  • dia12.5mm (mounted)
  • dia25mm (mounted)

What's the Thickness of Filter?

For unmounted filter, the substrate thickness is usually 1.1mm and 2.0mm.

For mounted filter(non threaded), the thickness is 3.5mm / 6mm. (upon request)

What's the substrate material?

Commonly, we use below material for making filters:

  • B270
  • BK7
  • D263t
  • 7980

Specifications

  • Center Wavelength (CWL)

    Center Wavelength refers to the wavelength that is located at the midpoint of the filter's passband.

  • FWHM (Full Width at Half Maximum)

    FWHM represents the width of the wavelength range where the filter transmits light at 50% or more of its peak transmission.

    Learn more about FWHM 

  • Peak Transmission (Tpk)

    Peak Transmission (Tpk) represents the maximum percentage of light that can pass through the filter within the transmission area.

  • Blocking Region

    The blocking region, refers to the range of wavelengths that an optical filter effectively attenuates or completely blocks.

  • Optical Density

    Optical Density (OD) is a measure of how much light is absorbed or blocked by a material as it passes through.

    Typical Range of OD

    • Commerical Use: OD2
    • General : OD3-OD4
    • Fluorescent: OD5- OD6

Moutning for Filters

  • Unmounted

    Unmounted Filters are thin slices of optical coating flat. Thickness usually ranging from 0.5mm - 2mm.

    Typical Thickness

    • 0.5mm
    • 1.0mm
    • 1.5mm
    • 2.0mm

  • Standard Mounting

    Standard Mounting are Mounts without thread. It is bascially a metallic ring for protecting the filter. Filters are secured inside with glue.

    Common Standard Mount are:

    • dia25mm (6mm/3.5mm thickness)
    • dia12.5mm (6mm/3.5mm thickness)

  • Threaded Mounting

    Threaded mounting are mounting with threads. Usually the filters is secured inside with retaining ring.

    Common Thread for Filters are:

    • SM Mount (SM05, SM1, SM2)
    • Metric Mount (M25.5 x 0.5mm ...)
    • Camera Mount (C-Mount, S-Mount)

  • Other Mounting

    We offer other type of mounting including:

    • Filter Cube
    • Filter Wheel
    • Filter Slide
    • Stackable Filter Holder
    • Fiber Port filter Holder

Need Customization?