Machine Vision LEDs — Advanced LED Solutions for Industrial Applications

Application Overview

QUEENDOM’s Machine Vision LEDs provide the specialized illumination required for automated optical inspection (AOI), barcode/QR code reading, surface defect detection, and dimensional measurement in manufacturing environments. Unlike general lighting LEDs that prioritize luminous flux and color quality, machine vision LEDs optimize for spectral purity, spatial uniformity, and temporal stability — the three factors that determine inspection accuracy. Our portfolio includes ring lights for uniform top illumination, bar lights for linear scanning, dome lights for diffuse reflection suppression, and coaxial lights for specular surface inspection. The critical specifications include: irradiance uniformity >90% across the field of view, color temperature stability ±2% during strobing, and rise/fall times <10μs for high-speed line scan cameras (up to 100kHz line rates). For color-critical inspections (food sorting, printed circuit board solder joint inspection), our white LEDs with CRI>90 and custom spectra (enhanced blue for silver contrast, enhanced red for copper oxide detection) improve defect detection rates by 15-30% compared to standard white sources. The IP67-rated housings and vibration-resistant mounting withstand factory floor conditions. The strobing capability (up to 500kHz with 1μs pulse width) extends LED effective life by 100x compared to continuous operation while freezing motion on high-speed production lines.

Technical Specifications

• Wavelength Range: Application-specific (see product datasheet)

• Optical Power: 1mW to 15W depending on configuration

• Package Options: 0603, 0805, 2835, 3535, 5050, 7070 ceramic

• Operating Temperature: -40°C to +85°C (industrial grade)

• Viewing Angle: 30° to 180° (lens and package dependent)

• ESD Protection: HBM 2000V-8000V

• Lifespan (L70): > 50,000 hours at rated current

Application Cases

PCB Solder Joint AOI System

A major EMS (Electronics Manufacturing Services) company deployed our bar light arrays in AOI systems inspecting 5,000 solder joints per minute on smartphone PCBs. The 8500K white spectrum with enhanced red component improved solder fillet wetting defect detection by 23%. The 50kHz strobing synchronized with 12k line-scan camera without motion blur at 450mm/s conveyor speed. The ±1% irradiance uniformity across 300mm inspection width eliminated false rejects from lighting variation. The 100,000-hour effective life (strobed operation) reduced maintenance downtime by 80% compared to fluorescent sources.

Food Packaging Barcode Verification

A food processing company installed our ring light systems on 24 packaging lines for real-time barcode grading (ISO/IEC 15416). The 6500K white with diffused dome provided uniform illumination of wrinkled and reflective packaging surfaces. The >95% uniformity eliminated barcode misreads caused by specular reflection hotspots. The 10μs strobe pulses synchronized with 500fps area cameras, capturing clear images at 3m/s line speeds. The IP65-rated housings withstood daily wash-down sanitation without degradation. Misread rates dropped from 0.8% to 0.02%, eliminating manual rework.

Recommended Products

• SWIR LED Chips (970-1700nm) — Short-wave infrared for internal defect detection and material discrimination

• 5050 RGB Addressable LED Chips — Multi-spectral illumination for color-based sorting and inspection

• 7070 High-Power Ceramic LED Chips — High-irradiance devices for large-area and high-speed inspection

Certifications

CE | RoHS | REACH | LM-80 tested | IEC 62471 | ISO 9001

Contact QUEENDOM

Email: sales@queendomlamp.com

Website: www.queendomlamp.com

技术规格与系统集成

Machine-vision LED illuminators provide >95% uniformity across the field of view with collimated beam angles (15°, 30°, 60°) and diffuse dome lighting for reflective-surface inspection (PCB solder joints, glass defects).

Strobe-mode operation at 1–50 kHz with <1 µs rise/fall times, synchronized to camera exposure via TTL trigger inputs; overdrive capability delivers 3× nominal intensity for short-pulse high-speed inspection. Wavelength options: 365 nm UV for fluorescence inspection, 450 nm blue for DAPI staining, 525 nm green for GFP imaging, 660 nm red for blood-oxygen analysis, 850 nm IR for covert surveillance and night-vision augmentation. Thermal management via copper-core MCPCB and active fan cooling maintains junction temperature <70°C during continuous strobe operation, extending LED lifetime to >50,000 hours L70.

Controller platforms support RS-232, RS-485, Ethernet (TCP/IP), and EtherNet/IP for seamless integration with Cognex, Keyence, Basler, and FLIR machine-vision systems.

ISO 9001 and ISO 13485 certified for medical-device imaging applications; CE, FCC, and RoHS compliant; 3-year standard warranty with on-site calibration service options.

Related Products

• 3535 Infrared LEDs
• 1608 Infrared LEDs
• High-Power Infrared LEDs

Further reading: AOI Machine Vision Case · Machine Vision LEDs Solutions · SWIR Machine Vision Deep Dive