The Evolution of the Zenith AOI Platform
The Koh Young Zenith series of 3D AOI systems represents the industry’s best-selling 3D automated optical inspection platform, with thousands of systems deployed across global electronics manufacturing. From its origins as the first True 3D AOI system to today’s AI-enhanced, multi-configuration lineup, the Zenith series has continuously evolved to meet the changing demands of SMT assembly.
What distinguishes the Zenith platform from general-purpose AOI is its foundation in True 3D measurement technology. Every Zenith system uses multi-directional structured light projection to capture full volumetric data, height, volume, and profile, for every solder joint, component, and feature on the board. This is not 2D image comparison with height interpolation; it is direct 3D measurement that produces quantitatively meaningful dimensional data.
Zenith Alpha: Best Value 3D AOI
The Zenith Alpha cost-effective 3D AOI is positioned as the best-value entry point into True 3D AOI, delivering AI-enhanced 3D measurement at a cost-effective price point. It is available in four variants:
HS: 8M camera at 10 μm or 15 μm resolution, 28 × 28 mm or 42 × 43 mm FOV. Inspection speed from 15.7 to 35.4 cm²/sec. Maximum measurable height: 4 mm.
HS+: 8M camera at 15 μm or 20 μm resolution. Speed from 31.1 to 52.3 cm²/sec. Maximum height: 25 mm, a significant capability expansion for mixed-technology boards with tall components.
UHS: 12M camera at 10 μm or 15 μm resolution, 41 × 31 mm or 61 × 46 mm FOV. Speed from 28.2 to 52.0 cm²/sec. Maximum height: 4 mm.
UHS+: 12M camera at 15 μm resolution, 61 × 46 mm FOV. Speed 46.0 cm²/sec. Maximum height: 25 mm.
All Zenith Alpha configurations run on Windows 11 IoT Enterprise LTSC 2024, providing modern OS security and long-term support.
Zenith 2: Next-Generation 3D AOI
The Zenith 2 next-generation 3D AOI is the next-generation iteration of the core Zenith platform, featuring 8-way projection for enhanced 3D measurement coverage. Key specifications include:
8M 15 μm: 42 × 43 mm FOV, inspection speed 29.1–36.9 cm²/sec.
8M 20 μm: 56 × 56 mm FOV, speed 42–61.5 cm²/sec, the larger FOV provides higher throughput for applications where 20 μm resolution is sufficient.
12M 15 μm: 61 × 46 mm FOV, speed 44.5 cm²/sec, combining high resolution with a wide FOV.
Maximum measurable height: 25 mm across all configurations. An optional side-view camera extends inspection capability to connectors, through-hole components, and features not visible from the top-down perspective. Like the Zenith Alpha, it runs on Windows 11 IoT Enterprise LTSC 2024.
Zenith UHS: Industry’s Fastest 3D AOI
The Zenith UHS ultra-high-speed 3D AOI is the fastest 3D AOI system in the Koh Young lineup, approximately twice as fast as the standard Zenith at comparable resolution. It is designed for high-volume production where cycle time is the primary constraint.
Available with 8M or 12M cameras at 10–20 μm resolution. At 8M 20 μm configuration, it achieves 52.3 cm²/sec, twice the throughput of the equivalent standard Zenith configuration. Maximum measurable height: 10 mm standard, 25 mm on UHS+ configurations.
The Zenith UHS also offers extended board handling: USX 1.0 accommodates boards up to 1,300 mm, and USX 2.0 extends to 1,500 mm, with a maximum PCB weight of 30 kg. This makes it suitable for large-format boards in server, telecommunications, and industrial applications where board length exceeds the capacity of standard conveyors.
Zenith F: FPCB Inspection
The Zenith F flexible PCB inspection is purpose-built for flexible printed circuit board inspection. Unlike the other Zenith models, which are designed for rigid PCBs, the Zenith F is optimized for the non-planar, low-profile nature of flexible circuits.
Key specifications: 12M camera at 10 μm resolution, 41 × 31 mm FOV, inspection speed 21.18 cm²/sec, maximum measurable height 1 mm, and maximum board size 490 × 580 mm in single mode. The 10 μm resolution and 1 mm height range are precisely matched to the fine features and low component profiles characteristic of FPCB assemblies.
PCB weight capacity is 4 kg, lighter than the rigid-board Zeniths, reflecting the lower mass of flexible substrates. The handling system is designed to minimize flex and maintain measurement accuracy across the non-planar board surface.
Zenith S: Offline AOI
The Zenith S offline 3D AOI for large boards is the only offline AOI system in the Zenith lineup. It is designed for large, complex boards, backplanes, server panels, and industrial PCBs, where inline inspection is impractical due to board size, low production volume, or the need for more detailed inspection than inline cycle times permit.
Specifications: 8M camera at 15 μm resolution, inspection speed 31.1 cm²/sec, maximum measurable height 4 mm, and maximum board size 650 × 600 mm. PCB thickness from 0.4 to 8 mm, with a maximum weight of 10 kg.
Smart Factory Integration
All Zenith series AOI systems integrate with the KSMART smart factory platform smart factory platform, providing real-time monitoring, OEE calculation, yield analysis, SPC, and cross-station defect correlation. KAP (Koh Young Auto Programming) reduces programming time by approximately 70% across all Zenith configurations, and KPO Mounter enables closed-loop feedback from AOI measurement data to mounter offset correction, achieving up to 90% offset correction.
For a detailed review of which Zenith model fits your production requirements, explore our 3D AOI vs 2D AOI comparison or contact Koh Young America to speak with an applications engineer and arrange a demonstration.
