B14110 Dual-Band Filter

The B14110 passes the blue-green spectrum with its 50 % cut-off measured at 551 nm. Transmission averages above 90 % from 420 to 540 nm, peaking at 93.6 % near 480 nm, delivering wide-band throughput across the blue-to-green window. Beyond the transition edge, the filter suppresses transmission to below 1 % by 568 nm and maintains sub-0.5 % blocking on average from 568 nm to 780 nm – a clean rejection floor across the yellow-to-NIR region.

Key Advantages

• Precise 551 nm cut-off – T50 % measured at 551.4 nm with a transition that drops to < 1 % within 17 nm, cleanly separating the blue-green passband from yellow-green and longer wavelengths.
• High-throughput passband – Average transmission above 90 % across 420–540 nm with a 93.6 % peak, minimizing signal loss across the wide blue-to-green window.
• Broadband blocking – Sub-0.5 % average transmission from 568 nm to 780 nm, ensuring reliable rejection of yellow, orange, red, and NIR wavelengths.
• Hard-oxide durability – Ion-assisted sputtered hard coating withstands heat, humidity, solvents, and frequent cleaning cycles.
• Custom formats – 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 excitation filtering – Passes the full excitation band for GFP, YFP, and Alexa Fluor 488 while blocking yellow emission wavelengths above 550 nm.
• Multi-channel microscopy – Defines a wide blue-to-green channel in multi-color imaging systems, preventing cross-talk with orange or red detection channels.
• Laser line clean-up – Removes broadband ASE from 488–532 nm laser sources and passes spectrally pure illumination up to the 550 nm edge.
• Machine vision – Isolates blue-green LED illumination in automated inspection systems requiring rejection of yellow and red ambient light.
• Architectural & stage lighting – Produces a clean emerald-green wash from broadband sources with no yellow, orange, or warm-tone contamination.

Need a 560 nm shortpass tailored to your optical path? KUPO Optics provides rapid prototyping and volume production to your exact size, shape, and substrate specifications.