BH-A05 Anti-Reflective (AR) Coating (Single Side)
Wide-passband filter transmitting a broad red window (364 – 974 nm) with steep edges and deep blocking on both sides for clean spectral isolation.
- Passband: 364 – 974 nm
- Bandwidth (FWHM): ~800 nm
- Centre wavelength: ~700 nm (nominal)
- Passband transmittance: ≥ 86.2 % T (± 9.6 % ripple)
- Short-wave edge (T50): ≈ 300 nm, ~64 nm steepness
- Long-wave edge (T50): ≈ 1100 nm, ~126 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-A05 Bandpass Extended delivers Passband 364 – 974 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-A05 Single-Side Anti-Reflection coating delivers broadband low-loss transmission across the ultraviolet through short-wave infrared spectrum (353-1200 nm) with peak efficiency of 95.8 % at 664 nm. Single-surface AR treatment minimizes Fresnel losses on one optical interface, enabling cost-effective insertion-loss reduction in optical systems where one substrate surface contacts optical elements while the other remains in air. The BH-A05 achieves exceptional performance across all visible wavelengths (Blue: 95 %, Green: 95 %, Red: 96 %) and extends into the infrared (NIR: 91 %, SWIR: 83 %), making it ideal for broadband imaging, spectroscopy, and laser beam delivery applications requiring uncompromised transmission efficiency.
Key Advantages
- Broadband UV-to-SWIR Coverage - 95.8 % peak transmission at 664 nm with >80 % sustained from 353-1200 nm enables efficient light collection across ultraviolet through short-wave infrared in single optical element.
- Single-Surface Optimization - One-side AR coating reduces Fresnel losses at the primary optical interface while enabling cost-effective substrate selection and simplified assembly.
- Exceptional Visible Transmission - Blue: 95 %, Green: 95 %, Red: 96 % ensures highly efficient visible light delivery with minimal color-dependent loss across the full visible spectrum.
- Hard-Oxide Ion-Assisted Coating - Single-surface hard-oxide design provides robust adhesion, mechanical durability, and thermal stability without optical delamination or performance degradation.
- Custom Format Flexibility - Round, square, and free-form geometries from 5-450 mm with substrate options including Borofloat, soda-lime, Schott D263 T, and Corning Eagle XG.
Typical Applications
- Broadband Spectroscopy - Single-surface AR reduces insertion losses across UV-visible-NIR measurement windows, enabling simultaneous UV absorption, visible transmission, and NIR reflectance measurements.
- Imaging Optics Windows - Functions as low-loss protective window on camera systems, reducing reflection losses and improving image brightness without requiring dual-coated optics.
- Laser Delivery Optics - Minimizes Fresnel losses for laser wavelengths from UV through SWIR, improving beam power delivery and reducing thermal load on downstream optical components.
- Scientific Instrumentation - Enables cost-effective broadband anti-reflection in portable field instruments, space-qualified systems, and resource-constrained research applications.
- Environmental Monitoring - Provides durable single-surface AR protection for outdoor optical sensors measuring UV-visible-NIR reflectance from soil, water, and vegetation.
Integrate the BH-A05 Single-Side AR coating into your optical system with rapid prototyping and scalable production to immediately reduce insertion losses.
FAQ
BH-A05 FAQ
What is BH-A05 and what is it used for?
BH-A05 is a Single-Side AR. The BH-A05 Single-Side Anti-Reflection coating delivers broadband low-loss transmission across the ultraviolet through short-wave infrared spectrum (353-1200 nm) with peak efficiency of 95.8 % at 664 nm. Single-surface AR treatment minimizes Fresnel losses on one optical interface, enabling cost-effective insertion-loss reduction in optical systems where one substrate surface contacts optical elements while the other remains in air. Common uses include Broadband Spectroscopy, Imaging Optics Windows, Laser Delivery Optics, and Scientific Instrumentation.
What are the key optical specs of BH-A05?
Key published specs for BH-A05 include Passband: 364 – 974 nm; Bandwidth (FWHM): ~800 nm; Centre wavelength: ~700 nm (nominal); Passband transmittance: ≥ 86.2 % T (± 9.6 % ripple); Short-wave edge (T50): ≈ 300 nm, ~64 nm steepness.
What applications is BH-A05 best suited for?
BH-A05 is commonly used for Broadband Spectroscopy, Imaging Optics Windows, Laser Delivery Optics, and Scientific Instrumentation. Broadband Spectroscopy - Single-surface AR reduces insertion losses across UV-visible-NIR measurement windows, enabling simultaneous UV absorption, visible transmission, and NIR reflectance measurements.
Can BH-A05 be customized for size, substrate, or coating requirements?
KUPO lists the construction for BH-A05 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. Single-Surface Optimization - One-side AR coating reduces Fresnel losses at the primary optical interface while enabling cost-effective substrate selection and simplified assembly.
What should I know about angle of incidence and durability for BH-A05?
The published angle of incidence for BH-A05 is 0° (normal incidence); custom angles available. The hard-oxide coating is built for repeated handling, heat, and cleaning.
