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Pixel Shift, Breaking the Resolution Limit: allPIXA evo 32K Line Scan Camera, the Best Solution for AOI Equipment Upgrades

2026.06.30

【One-Minute Summary】

Embracing the trends of Smart Manufacturing and Industry 4.0, upgrading the resolution of AOI optical inspection equipment often comes with pain points like “shallower depth of field and the need to redesign optical mechanisms.” This article explains how the Allied Vision allPIXA evo 32K line scan camera uses its exclusive Pixel Shift technology to directly double the resolution within the same field of view (FOV), under the low-barrier premise of “not needing to replace existing machine vision lenses or splice two cameras together.” This solution solves the problems of a shallow depth of field and dead angles in large-area defect inspection, making it the best choice for achieving high-yield automation upgrades.

  • Painless production line automation upgrade: By introducing the Allied Vision allPIXA evo 32K line scan camera, you can directly double the resolution in the same FOV without changing your existing machine vision lenses and mechanical setup.
  • Breaking high-resolution limits: Equipped with exclusive Pixel Shift technology, it solves the shallow depth of field pain point commonly encountered during traditional AOI optical inspection equipment upgrades, significantly enhancing the stability of visual inspection system integration.
  • Saying goodbye to dual-camera splicing and TDI limitations: A single camera can directly output complete, wide-field, high-resolution images, eliminating the distortion errors of traditional 16K camera splicing; moreover, the non-TDI architecture supports tilted installation, flexibly overcoming dead angles in large-area defect inspection.
  • The best answer for smart manufacturing: Balancing a large depth of field, high brightness, and low setup costs, it is the standard equipment for next-generation industrial image processing and yield improvement solutions.

 

Why Doesn’t Higher Resolution Guarantee More Stable AOI Inspection?

In the field of Automated Optical Inspection (AOI) for semiconductor and precision manufacturing, improving resolution has always been the core direction for pursuing higher inspection accuracy. However, in practice, engineers often face a dilemma: “Higher resolution ≠ more stable inspection.”

 

Because when the camera’s pixel size shrinks, it is often accompanied by a decrease in the depth of field and reduced focus tolerance. This means the optical system becomes more sensitive, harder to adjust, and more prone to going out of focus due to the sample’s unevenness or vibrations. So, is there an industrial image processing solution that can improve resolution while maintaining the stability of image quality?

 

The AVT allPIXA evo 32K line scan camera was born exactly for this reason. It offers the advantage of “seeing finer and inspecting more stably,” bringing truly usable high resolution to AOI.

 

 

Same Lens and FOV, Resolution Directly Doubled

For existing AOI systems, introducing this 32K camera is a relatively low-barrier resolution upgrade solution. Assuming the lens is not replaced and the optical design is not changed, it can provide twice the resolution of a 16K camera directly under the same Field of View (FOV). This means that when enterprises are undergoing production line automation upgrades:

  • No need to redesign the optical system.
  • No need to change the mechanical configuration.
  • Existing automated inspection systems and equipment can be directly upgraded.

 

(▲ Image comparison showing image quality under the same lens, with 16K on the left and 32K on the right)

Magnified windows (green and yellow boxes) clearly showcase the 32K image’s (right) superior detail retention, demonstrating how increased pixel density improves resolution and prevents focus issues in AOI applications.

 

 

Unveiling the Core Black Technology: Pixel Shift

The core of this high-end industrial camera lies in Pixel Shift technology. Unlike the traditional method of “shrinking pixel size” to improve resolution, Pixel Shift uses a lateral displacement (1/2 pixel) of two sensors. Then, through high-speed FPGA processing inside the camera, the image information originally acquired by two 16K / 5μm sensors is converted into a 32K / 2.5μm high-resolution image.

 

▲ The core concept of this technology is: instead of making the pixels smaller, it makes the pixels “denser.

 

Solving Pain Points: Resolution Increases Without Sacrificing Depth of Field and Brightness

Traditional high-resolution inspection upgrade solutions inevitably come with a shallow depth of field, causing optical adjustment difficulties and requiring higher mechanical stability, while also being extremely sensitive to changes in sample height. The key advantage of this Pixel Shift technology is that the single pixel size of the sensor remains at 5μm. Therefore, while achieving the same resolution, compared to traditional dual 16K camera splicing or 2.5μm 32K cameras, it can bring the following advantages to yield improvement solutions:

  • Larger DOF (Depth of Field), more stable image quality: According to actual tests, the depth of field of the 32K camera is significantly better than that of the 16K. The depth of field at the same resolving power is about 1.5 times that of the 16K.
  • Lower lens requirements: Under the premise of achieving the same image quality, the threshold for lens performance requirements is lower.
  • Maintains excellent brightness: It retains the physical light intake of the 5μm sensor, without sacrificing image brightness.
  • Simplified system architecture: It can effectively reduce or even omit the need for an Auto Focus system.

 

(▲ Image comparison showing results of shooting a depth-of-field gauge at 10μm resolution, with 16K on the left and 32K on the right)

This image displays the evaluation results of a depth of field gauge captured by 16K (left) and 32K (right) cameras at the same 10μm resolution. Verified by the grayscale contrast waveforms below, the 32K Pixel Shift camera delivers a significantly larger depth of field (DOF). This technical advantage effectively minimizes defocusing issues caused by sample height variations or vibrations, drastically enhancing the image stability and reliability of AOI inspection systems.

 

 

Saying Goodbye to Dual 16K Splicing and TDI Architecture Limitations

In the past, to simultaneously achieve “wide FOV + high resolution,” a common practice in machine vision system integration was to splice two 16K cameras. However, this introduces image stitching errors between the two images, issues with image synchronization, and image differences caused by camera calibration (such as image distortion inherent to the lenses), leading to increased calibration and maintenance costs. Now, with 32K Pixel Shift, a single camera can directly output complete high-resolution images. Because there is no need for splicing or alignment compensation, it greatly improves image consistency and system stability.

 

Furthermore, in the past, to pursue faster scanning speeds, a multi-line TDI (Time Delay Integration) line scan architecture was often adopted. Although it can enhance brightness, the camera’s mounting angle must be kept as horizontal as possible, and the moving speed must be highly consistent; otherwise, it is easy to suffer image degradation due to varying focus levels or optical effects.

 

The Allied Vision allPIXA evo 32K is not a multi-line TDI architecture, so it offers higher application flexibility. It can be tilted according to industrial inspection needs, which not only yields better images but also allows for freer optical design, helping to overcome the difficulties of dead angles in large-area defect inspection.

 

Specification Advantages Comparison: Why is the AVT allPIXA evo 32K Line Scan Camera the First Choice?

The following is a comprehensive comparison of different line scan AOI system integration solutions:

Comparison Item Traditional Dual 16K Splicing Solution Traditional 2.5μm 32K Camera allPIXA evo 32K (Pixel Shift)
Depth of Field (DOF) Normal Shallow depth of field, sensitive to sample unevenness Possesses a larger DOF at the same resolution, approximately 1.5 times that of 16K
Image Consistency Prone to stitching errors caused by factors such as lens distortion Single image, no splicing issues Single camera directly outputs complete high-resolution images, no splicing errors
System Mounting Flexibility Requires dual-camera calibration, high maintenance cost If TDI, requires strict horizontal mounting Supports tilted mounting, more flexible optical design

 

 

Conclusion: Embracing the Next Standard of Smart Manufacturing

The allPIXA evo 32K brings more than just an increase in resolution; through Pixel Shift technology, it redefines the balance between resolution, depth of field, and system cost. In the next generation of AOI optical inspection and smart factory applications, this will no longer be a trade-off, but a standard.

 

About OPTICKS TECHNOLOGY: Seeking Professional AOI Visual Hardware Integration and Technical Support

Whether the ultimate production line requirement is a flexible area scan camera or a line scan camera pursuing extreme speed and large-area seamless imaging, hardware matching, light source selection, and frame grabber bandwidth calculation are profound subjects.

As a professional distributor of AOI industrial vision solutions, OPTICKS TECHNOLOGY Co., Ltd. has over a decade of local integration experience; we not only provide a complete line of industrial camera imaging products but also offer one-stop matching recommendations—from light sources, lenses, and frame grabbers to software parameters—along with subsequent tuning assistance services.

Looking to perform AOI equipment upgrades? We provide comprehensive POC (Proof of Concept) testing and professional engineering technical support; feel free to contact OPTICKS, and let our team of vision experts assist you with the precise selection and painless upgrade of your production line inspection equipment..

 

 

More Related Articles on Line Scan Cameras

Welcome to refer to the [Line Scan Camera Page] for detailed product information.

FAQ
Q1: To upgrade existing 16K AOI equipment to 32K resolution, do I need to purchase new machine vision lenses or change the optical design?

A: No. Under the premise of not changing the lens or the optical design, this 32K Line Scan Camera can directly provide twice the resolution of 16K within the same field of view (FOV). Existing equipment can be directly upgraded with a relatively low barrier.

Q2: Why is it no longer recommended to use two 16K cameras spliced together to achieve a wide field of view and high resolution?

A: Traditional dual-camera splicing introduces stitching errors between the two images. Additionally, image capture synchronization and the calibration of the two cameras bring about image discrepancies (such as image distortion caused by the lenses themselves), which not only increases calibration and maintenance costs but also makes it difficult to ensure the absolute stability of the inspection system.

Q3: High resolution is usually accompanied by a shallow depth of field. Will this 32K camera make focusing more difficult?

A: No. Through Pixel Shift technology, the camera retains the physical light intake and characteristics of a 5μm sensor. Not only does it not sacrifice depth of field, but actual tests show the DOF performance is about 1.5 times that of a 16K camera, making the image quality more stable and effectively reducing or even eliminating the need for an Auto Focus system.

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