In industrial high-precision imaging inspection scenarios, telecentric lenses serve as the core components for achieving micrometer-level measurements and defect identification. As the “connecting hub” between lenses and cameras, interfaces directly determine equipment compatibility, imaging accuracy stability, and even system integration efficiency. Selecting the wrong interface not only risks incompatibility between lens and camera but also subtly compromises inspection data accuracy. From minute dimension measurements in SMT placement to precision semiconductor wafer inspection, interface specification variations—such as flange distance and thread dimensions—invisibly influence final results.

I. Standardized Industrial Interfaces

1. C/CS Mount

   • The C-mount features a 1-inch - 32UN thread with a flange distance of 17.526mm; the CS-mount has a flange distance of only 12.5mm, requiring an adapter ring to connect C-mount cameras.
   • Applications: Widely compatible with mainstream industrial cameras, suitable for small-to-medium sensor sizes (e.g., 1/3“ to 2/3”) in inspection scenarios such as SMT component placement verification and PCB defect detection.
   • Advantages: High standardization, plug-and-play functionality, and reduced system integration costs.

2. F-Mount

   • Specifications: Flange focal distance 46.5mm, large interface diameter, supports electromagnetic iris control (Nikon China).
   • Applications: Suited for large-format cameras (e.g., 1-inch and larger), commonly used in high-resolution inspection such as semiconductor wafer dimension measurement and automotive component 3D contour scanning.
   • Advantages: High mechanical stability and light transmission, ideal for high-speed dynamic inspection environments.

3. M42×1 Screw Mount

   • Specifications: Classic photographic mount with 12mm flange focal distance, requires an adapter ring for industrial cameras.
   • Applications: Line scan cameras or compact devices, e.g., phase adjustment and focus fine-tuning in 4K line scan inspection systems.

4. M72×0.75 Interface

   • Specifications: Large-diameter threaded interface with extended flange distance.
   • Applications: Ultra-large-format line scan cameras (e.g., 12k/16k pixels), suitable for large-area inspection of flat panel displays, solar panels, etc.

II. Customized Interfaces

1. M58 and Variant Interfaces

   • Specifications: Threads such as M58×0.75 or M58×1, typically non-standard designs.
   • Applications: Compatible with specific brand equipment or specialized optical modules, such as certain high-precision coaxial illumination systems.

2. M52×0.75 Interface

   • Specifications: Commonly used for optical component adapters, such as connecting lenses to SM2 barrels.
   • Applications: Laboratory equipment or custom inspection modules, such as lens mounting in infrared spectroscopy systems.

3. Coaxial Illumination Interfaces

   • Specifications: Integrated fiber optic coupling or LED light sources, such as 0.312“ ferrule interfaces (supporting ¼” fiber bundles) or 8mm coaxial light ports.
   • Applications: Reflective material inspection (e.g., scratches on metal surfaces), defect identification in transparent objects (e.g., glass cracks).

III. Typical Application Scenarios

• Semiconductor Inspection: A dual telecentric lens connects to a 12k line scan camera via an M72×0.75 interface to detect microcracks on wafer surfaces.

• Automotive Manufacturing: An F-mount telecentric lens paired with a large-format camera measures bore tolerance in engine cylinder blocks.

• Food Packaging: A C-mount lens with integrated coaxial illumination detects sealing defects in medicine bottles and evaluates label print quality.