MBP-A34 Multiband Filter

3-band multiband filter isolating Blue (488 nm), Near-IR (742 nm), and SWIR (1072 nm) in a single optic — replacing multiple discrete filters for streamlined optical paths and reduced insertion loss.

Band 1 — Blue / 488 nm
Centre / Range: 488 nm (398 – 579 nm)
Bandwidth (FWHM): 181 nm
Peak transmittance: ≥ 95.2 % T
Band 2 — Near-IR / 742 nm
Centre / Range: 742 nm (680 – 803 nm)
Bandwidth (FWHM): 123 nm
Peak transmittance: ≥ 94.5 % T
Band 3 — SWIR / 1072 nm
Centre / Range: 1072 nm (1064 – 1079 nm)
Bandwidth (FWHM): 15 nm
Peak transmittance: ≥ 81.4 % T
Overall performance
Inter-band blocking: OD ≥ 0.3 between passbands
Out-of-band blocking: OD ≥ 0.3 (200 – 1100 nm excluding passbands)
AOI: 0° (normal incidence); custom angles available
Construction: Ion-assisted hard-oxide; 5 – 450 mm shapes, 0.21 – 3.8 mm thick
Custom options: Band shifting, bandwidth tuning, additional bands, rapid prototypes

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MBP-A34 Multiband delivers Centre / Range 488 nm (398 – 579 nm), Bandwidth (FWHM) 181 nm, and Peak transmittance ≥ 95.2 % T.

The hard-oxide coating is built for repeated handling, heat, and cleaning.

Best suited for:

Multi-spectral imaging systems that require simultaneous capture across visible and near-infrared channels — this 3-band design eliminates the need for a motorised filter wheel, reducing mechanical complexity and increasing acquisition speed

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Description
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Description

MBP-A34 opens two well-defined transmission windows while firmly blocking the region between them. The first passband spans approximately 405–573 nm with average transmission above 93 % and a peak of 95.2 %, covering the blue-to-green visible range. A deep notch drives transmission below 5 % from 597 nm to 657 nm, suppressing the orange-red band, before the second passband rises at 687 nm and runs to 794 nm with average transmission around 92.3 % and a peak of 94.5 %. Beyond the NIR window, a second blocking zone from 830 nm to 1040 nm holds average transmission below 1 %, cleanly isolating the two passbands from infrared contamination. The result is a dual-band filter that passes blue-green and far-red/NIR while rejecting everything in between and beyond.

Key Advantages

Dual-band design with Tavg > 93 % (415–560 nm) and Tavg > 92 % (695–785 nm) - delivers two bright, well-separated channels from a single optical element.
Deep orange-red notch with Tavg < 2 % (610–650 nm) - suppresses sodium-line emission, amber LEDs, and orange autofluorescence.
Extended NIR blocking with Tavg < 1 % (830–1000 nm) - prevents silicon-detector infrared bleed-through from corrupting the signal.
Hard-oxide durability - ion-assisted coating withstands heat, humidity, solvents, and repeated cleaning without degradation.
Custom formats available - round, square, or free-form blanks from 5 mm to 450 mm, thickness 0.21–3.8 mm, on Borofloat®, soda-lime, Schott D263 T, or Corning Eagle XG substrates.

Typical Applications

Fluorescence microscopy (dual-excitation/emission) - simultaneously passes blue excitation and NIR emission or vice versa, supporting multicolour imaging without filter-wheel changes.
Machine vision with structured illumination - isolates blue-LED inspection light and 780 nm NIR ranging signals while blocking ambient orange-red light.
Stage and entertainment lighting - creates vivid blue-green-plus-deep-red colour mixes with a hard notch removing warm amber tones.
Precision agriculture and NDVI sensing - passes the green reflectance band and the NIR reflectance band needed for vegetation health indices.
Raman spectroscopy - blocks 633 nm laser excitation while transmitting both shorter and longer Raman-shifted bands.

Need prototypes in days or production volumes next quarter? MBP-A34 filters can be coated, diced, and shipped to your exact specifications.

FAQ

MBP-A34 FAQ

What is MBP-A34 and what is it used for?

MBP-A34 is a Dual-Band Bandpass Filter - Visible Blue-Green + Near-Infrared. MBP-A34 opens two well-defined transmission windows while firmly blocking the region between them. The first passband spans approximately 405-573 nm with average transmission above 93 % and a peak of 95.2 %, covering the blue-to-green visible range. Common uses include Fluorescence microscopy (dual-excitation/emission), Machine vision with structured illumination, Stage and entertainment lighting, and Precision agriculture and NDVI sensing.

What are the key optical specs of MBP-A34?

Key published specs for MBP-A34 include Centre / Range: 488 nm (398 – 579 nm); Bandwidth (FWHM): 181 nm; Peak transmittance: ≥ 95.2 % T; Centre / Range: 742 nm (680 – 803 nm); Bandwidth (FWHM): 123 nm.

What applications is MBP-A34 best suited for?

MBP-A34 is commonly used for Fluorescence microscopy (dual-excitation/emission), Machine vision with structured illumination, Stage and entertainment lighting, and Precision agriculture and NDVI sensing. Fluorescence microscopy (dual-excitation/emission) - simultaneously passes blue excitation and NIR emission or vice versa, supporting multicolour imaging without filter-wheel changes.

Can MBP-A34 be customized for size, substrate, or coating requirements?

KUPO lists the construction for MBP-A34 as Ion-assisted hard-oxide; 5 – 450 mm shapes, 0.21 – 3.8 mm thick. Published custom options include Band shifting, bandwidth tuning, additional bands, rapid prototypes. Custom formats available - round, square, or free-form blanks from 5 mm to 450 mm, thickness 0.21-3.8 mm, on Borofloat®, soda-lime, Schott D263 T, or Corning Eagle XG substrates.

What should I know about angle of incidence and durability for MBP-A34?

The published angle of incidence for MBP-A34 is 0° (normal incidence); custom angles available. The hard-oxide coating is built for repeated handling, heat, and cleaning.