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BBP-470A spectral response — original published curveOpen full-size image ↗
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Bandpass Filters

BBP-470A470 nm Bandpass Filter

BBP-470A is a bandpass filter. The main high-transmission region is approximately 459–490 nm.

  • Measured wavelength range: 300–1200 nm
  • Main-band width: ≈41.4 nm at half-peak transmission
  • Peak transmission: ≈90.5% at 477 nm
  • Transmission ≥80%: 459–490 nm; 1179–1185 nm
  • Transmission ≤5%: 300–447 nm; 503–1150 nm
  • Custom options: Wavelength response, dimensions and operating conditions

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.

Detailed measurement data

Main band at half-peak transmission

≈454.4–495.8 nm

Average transmission, 460–480 nm

89.375%

OPTICAL PERFORMANCE · BBP-470A

Read the numbers.
Understand the response.

Measured wavelength range

300-1200 nm. Performance outside this measured interval is not established by this curve.

Main band at half-peak transmission

Approximately 454.4-495.8 nm, giving a full width at half maximum (FWHM) of approximately 41.4 nm. This describes the main band only; other transmitted regions may remain.

Selected regions at or above 80% transmission

459-490 nm; 1179-1185 nm. Approximate measured intervals.

Selected regions at or below 5% transmission

300-447 nm; 503-1150 nm. Measured sample intervals; confirm the required blocking for your order.

Peak transmission

Approximately 90.5% at 477 nm. Peak wavelength is not the same as a defined centre wavelength.

Average measured transmission, 300-440 nm

0.685%. Calculated from the factory sample data.

Average measured transmission, 460-480 nm

89.375%. Calculated from the factory sample data.

Average measured transmission, 500-1100 nm

0.868%. Calculated from the factory sample data.

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.

This sample also transmits near-infrared light. If your detector responds there, assess that contribution and discuss any additional blocking needed.

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.

Illuminated inspection

A starting design for inspection systems using a source around 488 nm.

Optical sensing

A candidate for selecting a blue signal channel in a source-and-detector system.

Instrument development

A profile to evaluate for fluorescence excitation or collection channels.

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-470A 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.

Catalog cross-reference: BP470-D01 / BBP-470A

BBP-470A spectrum data CSV ↓KUPO Optics catalog Download ↗Explore Bandpass Filters →