BH-A01 IR/UV-Cut Hot-Mirror
Wide-passband filter transmitting a broad blue-green window (400 – 693 nm) with steep edges and deep blocking on both sides for clean spectral isolation.
- Passband: 400 – 693 nm
- Bandwidth (FWHM): ~309 nm
- Centre wavelength: ~548 nm (nominal)
- Passband transmittance: ≥ 85.2 % T (± 9.4 % ripple)
- Short-wave edge (T50): ≈ 393 nm, ~10 nm steepness
- Long-wave edge (T50): ≈ 702 nm, ~31 nm steepness
- Short-wave blocking: OD ≥ 3.8 below 363 nm
- Long-wave blocking: OD ≥ 1.3 above 732 nm
- AOI: 0° (normal incidence); custom angles available
- Construction: Ion-assisted hard-oxide; 5 – 450 mm shapes, 0.21 – 3.8 mm thick
- Custom options: Edge shifting, passband widening/narrowing, asymmetric blocking, rapid prototypes
Learn more
BH-A01 Bandpass Extended delivers Passband 400 – 693 nm, Bandwidth (FWHM) ~309 nm, and Centre wavelength ~548 nm (nominal).
The hard-oxide coating is built for repeated handling, heat, and cleaning.
Best suited for:
Green-channel machine vision and GFP/YFP fluorescence collection where a wide passband maximises photon collection efficiency while steep edges reject excitation light and adjacent channel crosstalk
Description
The BH-A01 Hot Mirror is a specialized thermal management filter designed to selectively pass visible light while efficiently blocking near-infrared thermal radiation. With peak transmission of 94.6 % at 611 nm and sustained visible transmission exceeding 80 % across the 397-695 nm range, this filter simultaneously achieves exceptional NIR blocking below 5 % from 710-1147 nm. This dual-band control makes the BH-A01 essential for applications requiring simultaneous visible light delivery and thermal load reduction, particularly in precision imaging and illumination systems where heat management directly impacts performance and component lifespan.
Key Advantages
- Peak Visible Transmission - Maintains 94.6 % transmission at 611 nm with consistent >80 % across red-green-blue, ensuring bright, unattenuated visible light delivery to sensors and optical systems.
- Superior NIR Rejection - Achieves \<5 % transmission from 710-1147 nm, effectively blocking thermal radiation that would otherwise degrade image quality and elevate system temperature.
- Broadband Visible Pass-Band - 97-395 nm transmission envelope captures full visible spectrum (UV: 7 %, Blue: 92 %, Green: 94 %, Red: 93 %) with minimal color distortion.
- Hard-Oxide Ion-Assisted Coating - Proprietary multilayer coating delivers superior adhesion, mechanical durability, and environmental stability against thermal cycling, humidity, and abrasion.
- Custom Format Flexibility - Available in round, square, and free-form geometries from 5-450 mm, with substrate options including Borofloat, soda-lime, Schott D263 T, and Corning Eagle XG to match system requirements.
Typical Applications
- Thermal Imaging Systems - Passes visible targeting reticles while blocking 95 % of thermal noise, enabling simultaneous thermal and visible imaging in combined camera systems.
- Precision Microscopy - Reduces heat load on biological specimens during fluorescence microscopy, preventing thermal drift, photobleaching acceleration, and sample damage.
- Machine Vision Inspection - Combines visible illumination with IR thermal rejection to maintain image contrast and sensor stability in production-line quality control.
- Laser-Based Systems - Protects downstream optics from thermal load while transmitting auxiliary visible alignment and monitoring wavelengths.
- Projection and Display - Manages heat in high-brightness projection systems by transmitting visible projection wavelengths while rejecting lamp thermal radiation.
Leverage the BH-A01 Hot Mirror's rapid prototyping turnaround and full production capability to integrate thermal management into your optical system today.
FAQ
BH-A01 FAQ
What is BH-A01 and what is it used for?
BH-A01 is a Hot Mirror. The BH-A01 Hot Mirror is a specialized thermal management filter designed to selectively pass visible light while efficiently blocking near-infrared thermal radiation. With peak transmission of 94.6 % at 611 nm and sustained visible transmission exceeding 80 % across the 397-695 nm range, this filter simultaneously achieves exceptional NIR blocking below 5 % from 710-1147 nm. Common uses include Thermal Imaging Systems, Precision Microscopy, Machine Vision Inspection, and Laser-Based Systems.
What are the key optical specs of BH-A01?
Key published specs for BH-A01 include Passband: 400 – 693 nm; Bandwidth (FWHM): ~309 nm; Centre wavelength: ~548 nm (nominal); Passband transmittance: ≥ 85.2 % T (± 9.4 % ripple); Short-wave edge (T50): ≈ 393 nm, ~10 nm steepness.
What applications is BH-A01 best suited for?
BH-A01 is commonly used for Thermal Imaging Systems, Precision Microscopy, Machine Vision Inspection, and Laser-Based Systems. Thermal Imaging Systems - Passes visible targeting reticles while blocking 95 % of thermal noise, enabling simultaneous thermal and visible imaging in combined camera systems.
Can BH-A01 be customized for size, substrate, or coating requirements?
KUPO lists the construction for BH-A01 as Ion-assisted hard-oxide; 5 – 450 mm shapes, 0.21 – 3.8 mm thick. Published custom options include Edge shifting, passband widening/narrowing, asymmetric blocking, rapid prototypes. Custom Format Flexibility - Available in round, square, and free-form geometries from 5-450 mm, with substrate options including Borofloat, soda-lime, Schott D263 T, and Corning Eagle XG to match system requirements.
What should I know about angle of incidence and durability for BH-A01?
The published angle of incidence for BH-A01 is 0° (normal incidence); custom angles available. The hard-oxide coating is built for repeated handling, heat, and cleaning.
