4K 25mm Line Scan Lens for Medium-Magnification Inspection

Who Is This 25mm Line Scan Lens Designed For?

This lens is suitable for machine vision system integrators, automation equipment manufacturers and factory vision engineers building medium-magnification line scan inspection systems.

It is a practical candidate when the project requires:

• A 4K line scan camera with approximately 7µm pixels
• An active line sensor length within the Ø32mm image circle
• A 25mm focal length with 0.125X-0.175X magnification
• Working distances from approximately 130mm to 187mm
• Low distortion for width, edge, pattern and circuit inspection
• M42, M72 or F-Mount mechanical integration

Why Use a Medium-Magnification Line Scan Lens?

A line scan camera captures one row of pixels at a time while the object or camera moves. This makes it possible to build a continuous image of moving products, long components or continuously processed materials.

The magnification range of the PMS-LLA015-2540M provides more target detail than very low-magnification line scan lenses while maintaining a wider line field of view than close-range 0.3X-0.7X configurations.

• PCB and circuit trace inspection
• Electronic component and lead-frame inspection
• Surface scratches, contamination and texture detection
• Edge, width and alignment inspection
• Printing, coating and color consistency inspection
• High-speed continuous production inspection

Ø32mm Image Circle and 7µm Camera Compatibility

The PMS-LLA015-2540M supports a maximum Ø32mm image circle and is specified for 7µm line scan cameras.

A typical 4096-pixel line sensor with 7µm pixels has an active line length of approximately 28.7mm. This fits within the specified image circle and provides coverage margin for alignment and sensor geometry.

Final compatibility should still be confirmed with the exact camera model, active line length, mount and required edge-image quality.

Magnification, Working Distance and Line Field of View

The approximate object-side line field of view is calculated by dividing the active line-sensor length by optical magnification. Actual usable coverage depends on camera alignment, focus position, image-quality requirements and mechanical installation.

Low Distortion and Uniform Line Imaging

The specified distortion is below 0.15%, helping reduce geometric error in edge detection, width inspection, PCB trace analysis and pattern comparison.

Relative illumination is specified at 65%. Uniform line lighting, exposure time, object speed and mechanical alignment remain important for consistent brightness across the full line.

For measurement tasks where object-height variation must not affect magnification, a telecentric line scan optical system should be evaluated.

Mount Options and Mechanical Integration

The source specification lists M42, M72 and F-Mount interface options. The mechanical drawing shows an M42 × P1.0 reference configuration, an object-side barrel diameter of approximately Ø42mm and a reference optical length of 80.4 ± 5.0mm.

• Focal length: 25mm
• Aperture range: F4.0-F16
• Maximum image circle: Ø32mm
• Resolution: 7µm
• Distortion: <0.15%
• Relative illumination: 65%
• Mount options: M42 / M72 / F-Mount

The exact flange, adapter and installation dimensions should be confirmed using the selected camera and mount configuration before production approval.

Typical Line Scan Applications

• PCB defect and circuit trace inspection
• Electronic component and lead-frame inspection
• Surface scratches, dents and contamination detection
• Surface texture, color and coating inspection
• Precision edge and width inspection
• Printing and pattern quality inspection
• Continuous web, film and sheet inspection
• Automated production-line image acquisition

When This Lens Is a Good Fit

• Your system uses a 4K line scan camera with approximately 7µm pixels
• The active line length is within the Ø32mm image circle
• The required magnification is 0.125X, 0.150X or 0.175X
• The installation can accommodate a 130-187mm working distance
• Your application requires a balanced line field and target detail
• M42, M72 or F-Mount integration is suitable

When to Consider Another Optical Solution

• The active line length exceeds the Ø32mm image circle
• The pixel size is significantly smaller than 7µm and higher optical resolution is required
• The application requires a much wider field and lower magnification
• The application requires a smaller field and substantially higher magnification
• Object-height variation must not affect magnification
• The project requires a telecentric line scan lens or a larger-format interface

Information Required for Line Scan Lens Selection

To confirm whether the PMS-LLA015-2540M is suitable, please provide:

1. Line scan camera model
2. Pixel count and pixel size
3. Active line-sensor length
4. Required object-side line field of view
5. Available working distance
6. Line rate and object movement speed
7. Smallest defect or feature to detect
8. Required width or positioning accuracy
9. Lighting method and object surface
10. Camera mount and available installation space

Manufacturer-Direct Optical and Application Support

POMEAS provides manufacturer-direct communication for camera-lens matching, magnification selection, working-distance review, mount confirmation, lighting coordination and sample evaluation.

• Review of active line length, pixel size and image-circle compatibility
• Selection of magnification, line field of view and working distance
• Support for M42, M72 and F-Mount integration
• Coordination of line lighting and exposure conditions
• Sample testing and compatibility verification
• Technical support for repeat-order automation projects

Reduce Selection Risk Before Ordering

Selecting a line scan lens by focal length alone may result in insufficient sensor coverage, an incorrect line field of view, unsuitable working distance or inadequate optical sampling.

Before quotation, POMEAS can review the camera model, active sensor length, pixel size, required line field of view, magnification, working distance and smallest defect to confirm whether this lens is a suitable option.

Frequently Asked Questions

Can this lens support a 4K line scan camera?

Yes. The lens is designed for 4K line scan imaging and is specified for cameras with approximately 7µm pixels and an active line length within the Ø32mm image circle.

What line field of view can the lens provide?

With a 28.7mm active line, the approximate line fields are 229mm at 0.125X, 191mm at 0.150X and 164mm at 0.175X.

What mount options are available?

The source specification lists M42, M72 and F-Mount options. Confirm the exact camera flange and adapter before ordering.

Is this a low-distortion line scan lens?

Yes. The specified optical distortion is below 0.15%.

Is it suitable for precision measurement?

It can support width, edge and calibrated inspection tasks. If object-height variation must not affect magnification, a telecentric line scan solution should be evaluated.

Related POMEAS Resources

• Browse machine vision lenses and imaging components
• Compare a 4K continuous zoom lens for area-scan inspection
• Review a C-Mount telecentric lens for precision measurement

Request Line Scan Lens Selection Support

Send POMEAS your camera model, active line length, pixel size, required line field of view, working distance, line rate and inspection target. The optical and application team can help verify coverage, magnification and installation suitability before quotation.