Bi-Telecentric Lens and Its Inspection Applications

The bi-telecentric lens, with its special optical design, allows cameras to receive parallel light, eliminating parallax errors and improving inspection accuracy. It also prevents stray light, ensuring sharp image contours. While traditional industrial lenses are widely used in machine vision systems and scientific research, particularly for measuring components, glass products, and electronic parts, the increasing demand for higher measurement accuracy has driven the expanded use of bi-telecentric lens.

Canrill Optics Bi-Telecentric Lens for High-Precision Measurement

Conventional FA lenses exhibit a perspective effect where objects closer to the lens appear larger than those farther away, compromising inspection accuracy. To address this issue, bi-telecentric lens was developed.

Canrill Optics bi-telecentric lens, thanks to its advanced optical design, ensures that light rays enter and exit the optical system parallel to the optical axis. This results in constant magnification, eliminating parallax errors in precision inspection applications. Additionally, the lens blocks stray light, enhancing the edge sharpness of the imaged object and ensuring clear contours for improved image processing.

Canrill Optics maintains strict performance standards for its bi-telecentric lens, keeping distortion and telecentricity within 0.05. The lens ensures minimal deformation, sharp imaging even at the field edges, high measurement accuracy, and excellent image uniformity. Edge images remain clear and sharp, without shadows, and exhibit minimal noise around detected objects.

Applications of Bi-Telecentric Lens

Bi-telecentric lens plays a crucial role in machine vision systems, particularly in precision measurement, defect detection, and positioning applications. Here are some key industries where these lenses excel:

Semiconductor Chip Inspection

In semiconductor manufacturing, bi-telecentric lens is vital for image measurement and inspection. Their high-precision, stable imaging capabilities ensure product quality and reliability. For instance, when measuring semiconductor chip pin pitch, the required accuracy can reach 0.01mm. The lens also detects defects such as damaged pins and surface scratches with exceptional precision.

Automotive Component Inspection

Automotive manufacturing involves numerous precise optical inspection and measurement tasks. A bi-telecentric lens enables operators to capture clear images from various working distances, achieving high-precision optical measurements. This improves assembly accuracy and quality control efficiency.

Medical Industry Applications

In the medical sector, bi-telecentric lenses support equipment production, medical diagnostics, and research. They provide non-contact measurement solutions, ensuring product safety and reliability while enhancing productivity and quality control.

For instance, in inspecting the inner and outer diameters of syringe needle tips, where the outer diameter is just 0.7mm, a bi-telecentric lens proves invaluable. Mechanical inspection methods risk causing surface damage, while Canrill Optics bi-telecentric lens allows defect detection without contact. In an example scenario, five needle tips are inspected, and the blocked needle tip is clearly visible due to the lens's parallel light reception, ensuring defects are detected accurately and efficiently.

Conclusion

These examples represent only a fraction of the applications of bi-telecentric lenses across various industries. In real-world scenarios, a bi-telecentric lens consistently delivers high accuracy in inspection tasks, significantly improving detection precision while reducing labor costs.