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Products / Broad Bandpass Filters / BBP-650
BBP-650 spectral response — original published curveOpen full-size image ↗
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Broad Bandpass Filters

BBP-650Broad Bandpass Filters

BBP-650 is a bandpass filter. The main high-transmission region is approximately 618-688 nm. Use the full curve to match the desired signal and check secondary transmission before choosing the filter.

  • Product family: Broad Bandpass Filters
  • Measured wavelength range: 300–800 nm
  • Published response: Transmittance

Measured interval is not the passband. Values shown are sample measurements. Final specifications are agreed for your order.

MEASURED OPTICAL RESPONSE

Read the light.

Original published sample data.

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Nearest measured point shown; no interpolation or extrapolation. Original sample values are preserved, including values outside 0–100%. Samples are selection references, not production acceptance limits.

OPTICAL PERFORMANCE · BBP-650

Read the numbers.
Understand the response.

Measured wavelength range

300-800 nm. Performance outside this measured interval is not established by this curve.

Main band at half-peak transmission

Approximately 611-693.8 nm, giving a full width at half maximum (FWHM) of approximately 82.8 nm. This describes the main band only; other transmitted regions may remain.

Selected regions at or above 80% transmission

618-688 nm. Approximate measured intervals.

Selected regions at or below 5% transmission

300-359 nm; 404-596 nm; 710-800 nm. Measured sample intervals; confirm the required blocking for your order.

Peak transmission

Approximately 94.7% at 644 nm. Peak wavelength is not the same as a defined centre wavelength.

These values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.

OPERATING CONDITIONS

Match the complete optical system.

Match the full source band.

Compare the source emission spectrum with the filter curve. Include the source bandwidth, rather than relying on the nominal wavelength alone.

Check unwanted response.

Compare the complete measured response with your detector sensitivity. Confirm any additional blocking needed for your system.

Define the incidence conditions.

Specify the working angle and whether the beam is collimated or converging. Confirm the required response under those conditions.

Confirm the physical fit.

Provide the available mounting space, required shape, dimensions and thickness. Physical specifications will be confirmed for your assembly.

APPLICATIONS

Where this profile can help.

Industrial & Machine Vision

Inspection, detection, sorting and image contrast.

Imaging & Photography

Manage exposure, unwanted wavelengths and reflection.

Research & Instrumentation

Spectral selection, beam paths and measurement systems.

Application examples are starting points for evaluation; suitability depends on the complete optical system.

CUSTOM & ENQUIRY

Tell us what
your design needs.

Start with BBP-650 and discuss the spectral response, physical format and operating conditions.

Include in your enquiry

  • Target wavelengths and required transmission or blocking
  • Light source and detector model, or their spectra
  • Working angle, beam geometry and operating environment
  • Required shape, dimensions, thickness and mounting constraints
  • Sample quantity, expected order quantity and project timing

TECHNICAL RESOURCES

Take the data
into your design.

BBP-650 spectrum data CSV ↓KUPO Optics catalog Download ↗Explore Broad Bandpass Filters →