



In the modern era of micro-electronics, Printed Circuit Boards (PCBs) are becoming increasingly dense and complex. As components shrink to the micron level, traditional inspection methods fall short. Laser Lenses for PCB Defect Detection have emerged as the gold standard in Automated Optical Inspection (AOI) and Automated X-ray Inspection (AXI) systems.
High-performance laser lenses allow for non-contact, high-speed scanning of circuit paths, solder joints, and component placement. By utilizing specific wavelengths and telecentric designs, these lenses eliminate perspective errors, ensuring that every micron of a PCB is analyzed with absolute fidelity.
Before components are placed, laser lenses scan the solder paste deposits. The lens must maintain a consistent focal plane to measure the volume, area, and height of the paste accurately. Any deviation can lead to "tombstoning" or weak joints during the reflow process.
Modern smartphones and high-performance computing (HPC) units use multi-layer PCBs. Laser lenses are used to ensure the perfect registration of vias across different layers, preventing electrical shorts and ensuring signal integrity.
Flexible circuits present unique challenges due to their non-rigid nature. Specialized laser lenses with deep depth-of-field (DOF) are required to capture clear images even when the substrate is slightly warped or curved during the inspection process.
In the final stage, laser lenses identify cosmetic defects, missing components, or polarity errors. The use of telecentric laser lenses ensures that components at the edge of the field of view are not distorted, providing uniform measurement accuracy across the entire board.
From manufacturing to creation, we are on the way
Canrill Optics, established in 2009, is the first one to focus on the manufacturing & marketing of telecentric lens and telecentric lens design in China, and the only one to build the complete supply chain with our own mechanical factory and optical factory in industry lens all over the world.
Over the years, as a custom lens manufacturer, Canrill lens has been upgraded four generations with advanced technology and performance, earned the trust from worldwide clients, and have successfully made cooperation with world-famous brands, like Samsung, Apple, LG, Huawei, Han’s Laser, TSMC, etc.
Our objective is to produce a top-level lens and become one of the leaders in telecentric technology.
From manufacturing to creation, we are on the way.
The future of PCB defect detection lies in the synergy between Advanced Optical Hardware and Artificial Intelligence. As we move towards Industry 4.0, laser lenses are becoming "smarter."
Lenses designed to work with AI algorithms to reconstruct high-resolution images from lower-quality raw data, speeding up the inspection process.
Incorporating liquid lens technology for ultra-fast autofocusing, allowing the system to inspect PCBs with varying component heights without mechanical movement.
Expanding beyond the visible spectrum to detect defects hidden beneath coatings or within the substrate layers using Infrared or Ultraviolet laser light.
As inspection robots become more mobile, the demand for compact, lightweight, yet high-performance laser lenses is skyrocketing.

Founder and CEO Mr. Xiang
Since founding Canrill in 2009, Simon has been focused on building the worlding leading manufacturer of telecentric lenses.

Chief Technology Officer Ming-Yong Cheng
Senior optical designer, with 10+ years' experience in the design and inspection of telecentric lens and lights.

Mechanical Director Mr. Zhang
15+ years' experience in the mechanical design and precision engineering.








Selecting the appropriate laser lenses for PCB defect detection is not just about magnification; it's about accuracy, repeatability, and reliability. As a leading manufacturer, Canrill Optics provides the technological backbone for the world's most demanding electronics production lines. Our lenses ensure that from the smallest consumer gadget to the most complex aerospace computer, every PCB is defect-free.
With our in-house mechanical and optical factories, we provide end-to-end solutions that are customized to your specific inspection needs. Trust the experts in telecentric technology to elevate your quality control standards.