BH-A06 Anti-Reflective (AR) Coating (Both Side)
Wide-passband filter transmitting a broad red window (382 – 873 nm) with steep edges and deep blocking on both sides for clean spectral isolation.
- Passband: 382 – 873 nm
- Bandwidth (FWHM): ~800 nm
- Centre wavelength: ~700 nm (nominal)
- Passband transmittance: ≥ 89.4 % T (± 9.9 % ripple)
- Short-wave edge (T50): ≈ 300 nm, ~82 nm steepness
- Long-wave edge (T50): ≈ 1100 nm, ~227 nm steepness
- Short-wave blocking: OD ≥ 2.0 below 270 nm
- Long-wave blocking: OD ≥ 2.0 above 1130 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-A06 Bandpass Extended delivers Passband 382 – 873 nm, Bandwidth (FWHM) ~800 nm, and Centre wavelength ~700 nm (nominal).
The hard-oxide coating is built for repeated handling, heat, and cleaning.
Best suited for:
Near-infrared imaging and sensing applications — including silicon-sensor camera systems, LIDAR receivers, and night-vision optics — where the wide NIR passband maximises signal collection across the sensor's peak sensitivity range
Description
The BH-A06 Double-Side Anti-Reflection coating represents the ultimate expression of broadband low-loss transmission, delivering dual-surface AR optimization for applications demanding maximum photon efficiency. With peak transmission of 99.3 % at 681 nm and sustained >80 % across the 370-1004 nm range, the BH-A06 achieves the highest visible transmission in the entire BH-A series. Dual-surface coating simultaneously minimizes Fresnel losses at both air-glass interfaces, reducing total reflectance below 1 % across the visible spectrum. The BH-A06 is essential for multi-element optical systems, precision imaging, and laser applications where cumulative Fresnel losses across multiple optical surfaces would otherwise significantly degrade performance.
Key Advantages
- Peak Visible Transmission Performance - 99.3 % transmission at 681 nm with Blue: 98 %, Green: 99 %, Red: 99 % represents the highest visible transmission available, maximizing photon throughput across all visible wavelengths.
- Dual-Surface Loss Minimization - Simultaneous AR treatment on both surfaces reduces total reflectance below 1 % per interface, critical for multi-element optical systems where losses accumulate.
- Broadband 370-1004nm Pass-Band - Sustained >80 % transmission from UV through near-infrared enables single-element broadband filtration without performance degradation across ultraviolet to NIR.
- Hard-Oxide Ion-Assisted Coating - Dual-surface hard-oxide multilayer design ensures exceptional adhesion, mechanical durability, and environmental resistance on both optical surfaces.
- Custom Format Flexibility - Round, square, and free-form formats from 5-450 mm with Borofloat, soda-lime, Schott D263 T, and Corning Eagle XG substrate options.
Typical Applications
- Precision Microscopy Systems - Dual-surface AR minimizes Fresnel losses in objective front elements and field lenses, improving brightness and contrast in high-magnification fluorescence imaging.
- Multi-Element Optical Instruments - Reduces cumulative Fresnel losses in systems with 4+ optical surfaces, preserving signal intensity in complex spectroscopic and imaging pathways.
- High-Performance Laser Systems - Minimizes insertion loss in laser beam steering, focusing, and delivery systems, reducing heat load and improving optical efficiency across visible to NIR wavelengths.
- Astronomical Instrumentation - Dual-surface AR maximizes light collection efficiency in telescopes and spectrographs, critical for faint-light detection from distant celestial sources.
- Display and Projection - Enables bright, high-contrast projection and display systems by minimizing reflection losses across all optical path elements.
Deploy the BH-A06 Double-Side AR coating to maximize transmission efficiency in your multi-element optical system with our rapid prototyping and production capability.
FAQ
BH-A06 FAQ
What is BH-A06 and what is it used for?
BH-A06 is a Double-Side AR. The BH-A06 Double-Side Anti-Reflection coating represents the ultimate expression of broadband low-loss transmission, delivering dual-surface AR optimization for applications demanding maximum photon efficiency. With peak transmission of 99.3 % at 681 nm and sustained >80 % across the 370-1004 nm range, the BH-A06 achieves the highest visible transmission in the entire BH-A series. Common uses include Precision Microscopy Systems, Multi-Element Optical Instruments, High-Performance Laser Systems, and Astronomical Instrumentation.
What are the key optical specs of BH-A06?
Key published specs for BH-A06 include Passband: 382 – 873 nm; Bandwidth (FWHM): ~800 nm; Centre wavelength: ~700 nm (nominal); Passband transmittance: ≥ 89.4 % T (± 9.9 % ripple); Short-wave edge (T50): ≈ 300 nm, ~82 nm steepness.
What applications is BH-A06 best suited for?
BH-A06 is commonly used for Precision Microscopy Systems, Multi-Element Optical Instruments, High-Performance Laser Systems, and Astronomical Instrumentation. Precision Microscopy Systems - Dual-surface AR minimizes Fresnel losses in objective front elements and field lenses, improving brightness and contrast in high-magnification fluorescence imaging.
Can BH-A06 be customized for size, substrate, or coating requirements?
KUPO lists the construction for BH-A06 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 - Round, square, and free-form formats from 5-450 mm with Borofloat, soda-lime, Schott D263 T, and Corning Eagle XG substrate options.
What should I know about angle of incidence and durability for BH-A06?
The published angle of incidence for BH-A06 is 0° (normal incidence); custom angles available. The hard-oxide coating is built for repeated handling, heat, and cleaning.
