3-CMOS Camera Enables Deterministic Color Inspection

Stemmer Imaging has introduced the JAI Apex Series, a color imaging platform based on 3-CMOS prism architecture designed for industrial inspection systems. The system replaces interpolation-based color reconstruction with direct spectral separation, enabling precise and repeatable color measurement for applications where classification accuracy is critical.

From Interpolation to Measurable Color Data
Conventional color cameras based on Bayer filters reconstruct missing color information through de-mosaicking. This process introduces spectral overlap and interpolation artifacts, particularly in high-contrast or fine-structure scenarios.

The Apex Series addresses these limitations by separating incoming light into red, green, and blue components using a dichroic prism. Each channel is captured by a dedicated CMOS sensor, ensuring that every pixel contains full RGB information without interpolation.

This approach improves color accuracy and stability, particularly in applications requiring consistent classification under varying illumination conditions.

3-CMOS Prism Architecture and Sensor Technology
The system integrates three Sony Pregius S backside-illuminated (BSI) sensors, each with a resolution of 5.1 megapixels (2472 × 2064). The 2.74 µm pixel pitch supports high spatial resolution while maintaining sensitivity.

Backside illumination enhances quantum efficiency, enabling improved signal capture in low-light or high-speed inspection environments. The system supports frame rates of up to 75 frames per second and provides 24-bit and 30-bit RGB output.

Industrial interfaces including 5GigE Vision, CameraLink, and CoaXPress enable integration into high-throughput machine vision systems.

Impact on Inspection Accuracy and Process Control
By eliminating interpolation, the system delivers consistent color measurements in CIE Lab* space, improving the detection of subtle variations in hue and intensity. This is particularly relevant in automated inspection workflows where color is a key parameter for classification.

Enhanced spatial fidelity also improves edge definition and microstructure analysis, supporting applications where fine details influence quality assessment.




Industrial Integration and Robustness
The camera is designed for deployment in industrial environments, with resistance to vibration up to 3G and shock tolerance up to 10G. A compact housing (54 × 54 × 74 mm) supports installation in space-constrained systems.

Compliance with GenICam standards ensures compatibility with existing machine vision software and facilitates integration into digital supply chain environments where inspection data must be captured and processed consistently.

Application Areas in Automated Inspection
The Apex Series is suited to applications where precise color differentiation directly affects yield and quality control. These include food grading, automotive surface inspection, multilayer ceramic component verification, printed circuit board inspection, print validation, and pharmaceutical analysis.

Relevance for Machine Vision Systems
As industrial inspection systems evolve, color is increasingly treated as a measurable parameter rather than a visual attribute. Technologies that provide deterministic color data improve classification reliability and reduce uncertainty in automated decision-making.

Within a digital supply chain, such capabilities support consistent quality assurance, enabling more efficient production processes and reducing variability across manufacturing operations.

Edited by Romila DSilva, Induportals Editor, with AI assistance.