850nm Narrow Bandpass Filter with Precision Threaded Mount
Plug-and-Play Integration | Anti-Ghosting Asymmetric Design | OD4+ Ambient Blocking
- Industrial-Grade Mount: Housed in a black anodized aluminum ring with precision knurled edges and standard screw threads, ready for direct drop-in integration onto industrial camera lenses.
- Asymmetric Optical Architecture: Features a highly reflective cyan-blue dielectric front face to aggressively block visible light, and a deep-purple Anti-Reflection (AR) back face to eliminate sensor ghosting.
- Optimized for LED Thermal Drift: Features a practical 50nm Full Width at Half Maximum (FWHM). This specific bandwidth is engineered to capture the full output of 850nm IR LEDs even when their center wavelength shifts due to thermal variations in harsh factory environments, ensuring consistent image brightness.
- 100% Export Compliant: Engineered exclusively for commercial machine vision and automation. Completely Germanium-free and ITAR-free, ensuring a restriction-free global supply chain.
Technical Specifications
| Technical Parameter | Specification |
|---|---|
| Substrate | Premium Optical Glass |
| Mounting Frame | Black Anodized Aluminum (with knurled grip) |
| Center Wavelength (CWL) | 850nm ±2nm |
| FWHM (Bandwidth) | 50nm (Optimized for standard IR LED arrays) |
| Peak Transmittance | > 90% @ 850nm |
| Out-of-Band Blocking | OD4 (T < 0.01%) @ Vis to Near-IR |
| Front Face (External) | High-Density Dielectric Coating (Cyan-Blue Reflection) |
| Back Face (Internal) | Anti-Reflection (AR) / Absorptive Layer (Deep Purple) |
| Clear Aperture | > 90% of internal ring diameter |
Product Overview
Ready for Machine Vision
Save assembly time and reduce handling risks. This 850nm bandpass filter comes pre-mounted in a precision-machined aluminum frame. The rugged, threaded design allows vision engineers to securely attach the filter directly to industrial lenses, ensuring exact optical alignment for Automated Optical Inspection (AOI) and ANPR systems.
Zero Ghosting, Flawless Contrast
Unwanted internal reflections can ruin image processing algorithms. Our asymmetric coating design solves this. The front cyan-blue dielectric layer acts as an absolute shield against visible background light, while the internal deep-purple AR face absorbs scattered infrared photons bouncing off the CMOS sensor, effectively eliminating "ghosting" and glare.
Reliable, Risk-Free Supply
We understand the importance of supply chain stability in B2B manufacturing. By strictly focusing on civilian-use instrumentation and avoiding export-restricted materials like Germanium, Clarvis Industrial provides uninterrupted, globally compliant optical components for your factory floors and third-party assembly lines.
Metrology & Performance Reports
Figure 1: Broadband Blocking Profile (400nm – 1200nm)
This spectral curve demonstrates our stringent OD4 out-of-band blocking capability across the visible and near-infrared spectrum. It ensures absolute immunity to complex ambient lighting in factory environments. (Engineering Note: The minor transmission observed beyond 1150nm falls entirely outside the spectral sensitivity range of standard Silicon-based CMOS sensors used in machine vision, guaranteeing true dark-background performance and zero sensor interference.)
Figure 2: High-Resolution Transmission Band (800nm – 900nm)
A close-up view of the passband reveals a peak transmittance exceeding 95% at 850nm, coupled with razor-sharp cut-on and cut-off edges. The optimized 50nm FWHM (Full Width at Half Maximum) is specifically engineered to accommodate the thermal wavelength drift of high-power industrial IR LEDs, ensuring stable and consistent image brightness during prolonged, continuous machine operations.
Metrology Analysis & Application Fit
- Target Wavelength: 850nm (The industry standard for industrial IR LED illumination).
Performance Index: OD4+ broad-spectrum blocking guarantees your camera only sees the specific targeted wavelength, ignoring all variable factory lighting.
Mechanical Precision: The threaded metal mount prevents stress-induced birefringence on the glass substrate, maintaining peak optical flatness during operation.
Primary Applications: Ideal for robotic guidance, semiconductor wafer inspection, logistics barcode scanning, and driver monitoring systems under unpredictable lighting
Custom Sub-Assembly & Engineering Services
Off-the-shelf filters don’t always fit custom hardware. We specialize in bridging the gap between raw optical components and final instrument assembly. Whether you need a specific thread pitch for your metal frames, custom bandwidth adjustments, or complete optical sub-assembly design, our technical team is ready to optimize your vision systems.