MBP-A35 Multi-region spectral filter

Multi-region spectral filter (MBP-A35)

MBP-A35 is a multi-region spectral filter. The reference spectrum shows multiple high-transmission regions at approximately 541-559 nm; 644-671 nm; 827-871 nm. Light from these bands passes through the same optic. Check every band against your light source and detector. To measure the bands separately, use alternating light sources or separate detection paths.

Optical performance

• Measured wavelength range: 300-1200 nm. Performance outside this measured interval is not established by this curve.
• Main band at half-peak transmission: Approximately 820.2-881.8 nm, giving a full width at half maximum (FWHM) of approximately 61.6 nm. This describes the main band only; other transmitted regions may remain.
• Selected regions at or above 80% transmission: 541-559 nm; 644-671 nm; 827-871 nm. Approximate measured intervals.
• Selected regions at or below 5% transmission: 321-524 nm; 573-631 nm; 693-806 nm; 903-1082 nm. Measured sample intervals; confirm the required blocking for your order.
• Peak transmission: Approximately 96.5% at 845 nm. Peak wavelength is not the same as a defined centre wavelength.
• Average measured transmission, 350-520 nm: 0.191%. Calculated from the factory sample data.
• Average measured transmission, 540-560 nm: 86.079%. Calculated from the factory sample data.
• Average measured transmission, 580-630 nm: 1.132%. Calculated from the factory sample data.
• Average measured transmission, 650-670 nm: 89.591%. Calculated from the factory sample data.
• Average measured transmission, 690-810 nm: 1.081%. Calculated from the factory sample data.
• Average measured transmission, 830-870 nm: 90.897%. Calculated from the factory sample data.
• Average measured transmission, 890-1050 nm: 1.939%. Calculated from the factory sample data.
• Customization: We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.

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.

Applications to consider

• Multi-wavelength inspection: Consider retaining the measured visible and infrared regions in a common optical path. Match each illumination band and account for every transmitted region in the detector response.
• Shared-path sensing: Use alternating light sources or separate detectors if you need to measure each wavelength band independently. Multiple passbands alone do not give separate readings for each band.
• Illumination-profile development: Compare the transmitted and attenuated regions with the source spectrum. Include the additional UV or longer-wavelength transmission visible in the reference spectrum when relevant to the setup.

Choosing this filter

• Additional regions reach at least 50% transmission at approximately 534-563 nm; 640-680 nm. Include these in the detector and blocking assessment.
• Check the full wavelength range of your light source, the wavelengths your detector responds to, and how much unwanted light you need to block. Use the full curve when choosing a filter; the product code and peak do not tell the whole story.
• Tell us the angle at which light reaches the filter and whether the beam is parallel or converging. For demanding rejection or high-power use, confirm the required blocking and power-handling specifications.

Custom options

Start with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.