BH-A12 Green Transmission Mirror
3-band multiband filter isolating Green (538 nm), Near-IR (745 nm), and NIR (937 nm) in a single optic — replacing multiple discrete filters for streamlined optical paths and reduced insertion loss.
- Band 1 — Green / 538 nm
- Centre / Range: 538 nm (480 – 595 nm)
- Bandwidth (FWHM): 115 nm
- Peak transmittance: ≥ 97.6 % T
- Band 2 — Near-IR / 745 nm
- Centre / Range: 745 nm (736 – 754 nm)
- Bandwidth (FWHM): 18 nm
- Peak transmittance: ≥ 65.2 % T
- Band 3 — NIR / 937 nm
- Centre / Range: 937 nm (774 – 1100 nm)
- Bandwidth (FWHM): 326 nm
- Peak transmittance: ≥ 72.5 % 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
Learn more
BH-A12 Multiband delivers Centre / Range 538 nm (480 – 595 nm), Bandwidth (FWHM) 115 nm, and Peak transmittance ≥ 97.6 % 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
Description
The BH-A12 Green Transmit Mirror (GTM) is a color-selective optical element designed to isolate green light (487-590 nm, peak 97.6 % at 574 nm) while efficiently suppressing adjacent blue and red wavelengths. The GTM maintains >80 % transmission across the 487-590 nm green pass-band while simultaneously blocking blue wavelengths \<25 % and red wavelengths \<5 % (600-700 nm: 4.8 %). Extended NIR transmission (58 %) enables flexible system design combining green fluorescence detection with infrared components. The BH-A12 is essential for GFP/FITC-based fluorescence microscopy, 488-532 nm laser systems, and multi-color imaging requiring isolated green-channel detection.
Key Advantages
- High Green Transmission - 97.6 % peak at 574 nm with sustained >80 % across 487-590 nm ensures maximum GFP and FITC fluorophore signal delivery.
- Selective Blue Blocking - \<25 % blue transmission prevents blue excitation crosstalk while allowing some blue background measurement for system calibration.
- Complete Red Rejection - 4.8 % transmission across 600-700 nm prevents red fluorophore crosstalk, enabling simultaneous green and red detection without false signals.
- Hard-Oxide Ion-Assisted Coating - Multilayer hard-oxide design withstands visible laser irradiance and maintains spectral stability across thermal cycling and environmental exposure.
- Custom Format Flexibility - Round, square, and free-form geometries from 5-450 mm with Borofloat, soda-lime, Schott D263 T, and Corning Eagle XG substrates.
Typical Applications
- GFP Fluorescence Microscopy - Transmits 505-530 nm GFP emissions while rejecting blue excitation light and red autofluorescence for high-contrast live-cell imaging.
- FITC Flow Cytometry - Isolates 488-532 nm FITC signal in multi-color cell analysis, improving sensitivity in populations with high green fluorescence.
- 488-532nm Laser Detection - Couples visible laser wavelengths into detection optics while suppressing blue pump light and red background fluorescence.
- Confocal Microscopy - Green channel isolation in multi-photon systems, transmitting GFP signal while blocking blue and red cross-excitation.
- Environmental Monitoring - Green fluorescence detection from chlorophyll, phytoplankton, and algae in water quality and ecological assessment systems.
Integrate the BH-A12 Green Transmit Mirror into your GFP-based fluorescence system with rapid prototyping and production capability.
FAQ
BH-A12 FAQ
What is BH-A12 and what is it used for?
BH-A12 is a GTM - Green Transmit Mirror. The BH-A12 Green Transmit Mirror (GTM) is a color-selective optical element designed to isolate green light (487-590 nm, peak 97.6 % at 574 nm) while efficiently suppressing adjacent blue and red wavelengths. The GTM maintains >80 % transmission across the 487-590 nm green pass-band while simultaneously blocking blue wavelengths <25 % and red wavelengths <5 % (600-700 nm: 4.8 %). Common uses include GFP Fluorescence Microscopy, FITC Flow Cytometry, 488-532nm Laser Detection, and Confocal Microscopy.
What are the key optical specs of BH-A12?
Key published specs for BH-A12 include Centre / Range: 538 nm (480 – 595 nm); Bandwidth (FWHM): 115 nm; Peak transmittance: ≥ 97.6 % T; Centre / Range: 745 nm (736 – 754 nm); Bandwidth (FWHM): 18 nm.
What applications is BH-A12 best suited for?
BH-A12 is commonly used for GFP Fluorescence Microscopy, FITC Flow Cytometry, 488-532nm Laser Detection, and Confocal Microscopy. GFP Fluorescence Microscopy - Transmits 505-530 nm GFP emissions while rejecting blue excitation light and red autofluorescence for high-contrast live-cell imaging.
Can BH-A12 be customized for size, substrate, or coating requirements?
KUPO lists the construction for BH-A12 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. Selective Blue Blocking - <25 % blue transmission prevents blue excitation crosstalk while allowing some blue background measurement for system calibration.
What should I know about angle of incidence and durability for BH-A12?
The published angle of incidence for BH-A12 is 0° (normal incidence); custom angles available. The hard-oxide coating is built for repeated handling, heat, and cleaning.
