Low Distortion Lens – M401916006520

M401916006520 is Low-distortion 1/6″ CCTV lens with 78° D.F.O.V., F2.0 fixed aperture, and 3P structure for security surveillance applications.

1.9mm M4 Miniature Low Distortion Wide Angle Lens

This 1.9mm M4 miniature low distortion wide angle lens is designed for compact 1/6″ imaging modules, providing a 78° diagonal field of view with less than 1% TV distortion. Its ultra-short 3.2mm total track length, F2.0 aperture, and 0.2m minimum object distance make it suitable for compact embedded cameras and space-constrained visual inspection systems.

M4 Miniature Low Distortion Lens Core Highlights

• <1% TV Distortion: Maintains highly accurate image geometry for compact visual inspection and monitoring.
• 78° Diagonal FOV: Provides broad scene coverage from a short 1.9mm focal length.
• Ultra-Short 3.2mm T.T.L.: Enables integration into extremely compact camera modules.
• F2.0 Fixed Aperture: Provides a relatively bright optical configuration for embedded imaging.
• M4 × 0.25 Mount: Designed for miniature camera assemblies where conventional lens mounts are too large.

1.9mm M4 Miniature Low Distortion Lens Applications

Core Application Scenes

This 1.9mm miniature low distortion lens is designed for compact imaging applications where both optical accuracy and mechanical size are important. Its combination of <1% TV distortion and a 78° diagonal field of view makes it particularly useful when a wide viewing area is required without introducing significant geometric deformation.

The lens is well suited to compact inspection cameras installed inside equipment, where the camera must observe a relatively broad area while maintaining a small optical footprint. The 0.2m minimum object distance also provides practical working distance for close-to-medium-range inspection rather than extreme macro imaging.

Its 3.2mm total track length and 0.60mm back focal length make the lens particularly valuable for embedded camera designs with limited optical cavity depth. It can be considered for compact automation cameras, electronic equipment inspection modules, miniature robotic vision units, and other OEM imaging assemblies where a conventional M12 or larger lens would consume excessive installation space.

For applications requiring accurate dimensional imaging, the low-distortion optical design can help reduce geometric errors introduced by the lens, making it easier for downstream image-processing software to analyze object position, shape, and relative dimensions.

Designed for compact low-distortion inspection and embedded machine vision applications.

Compatible Device List

• 1/6″ CMOS Camera Modules: Optimized for compact imaging systems using 1/6″ sensors.
• Embedded Inspection Cameras: Suitable for equipment-integrated cameras where limited optical space requires a short lens assembly.
• Miniature Machine Vision Devices: The low-distortion design can support visual measurement, positioning, and inspection tasks where image geometry matters.
• Compact Robotics Cameras: The 3.2mm T.T.L. allows integration into small robotic or actuator-mounted vision modules.
• OEM Imaging Modules: The M4 × 0.25 mount is suitable for custom camera assemblies requiring a small mechanical interface.

Engineers can use the FOV Calculator to evaluate how sensor size and focal length affect the required viewing area before integrating the lens into a camera system.

For additional guidance on matching sensor formats and optical specifications, the Sensor Guide provides useful information for camera and lens selection.

Why Low Distortion Matters

With TV distortion below 1%, this lens provides a significantly more controlled image geometry than typical wide-angle miniature lenses with higher distortion. This characteristic is especially useful when straight lines, object dimensions, or positional relationships need to remain visually accurate across the image.

For engineers evaluating optical distortion in industrial imaging, the Distortion Guide provides additional information about distortion characteristics and their impact on imaging performance.

The lens therefore offers a practical balance between wide-angle coverage, low geometric distortion, and extremely compact mechanical dimensions.

Frequently Asked Questions

Q: What sensor size is this lens designed for?
A: This lens is designed for 1/6″ image sensors and provides a 78° diagonal field of view.

Q: Is this a low distortion lens?
A: Yes. The specified TV distortion is below 1%, making it suitable for applications where image geometry and straight-line accuracy are important.

Q: Is this lens considered a fisheye lens?
A: No. Its 78° diagonal field of view combined with less than 1% TV distortion is characteristic of a controlled wide-angle design rather than a fisheye lens.

Q: What is the focal length of this miniature lens?
A: The focal length is 1.9mm, providing a relatively wide viewing angle on a compact 1/6″ image sensor.

Q: What is the minimum object distance?
A: The M.O.D. is 0.2m, allowing the lens to image subjects at relatively close working distances.

Q: What mount does this lens use?
A: The lens uses an M4 × 0.25 mount, making it suitable for miniature camera modules and compact embedded imaging assemblies.

Q: How compact is the optical assembly?
A: The total track length is only 3.2mm, with a 0.60mm back focal length, making the lens suitable for applications with very limited optical installation depth.

Q: What applications benefit from the low distortion design?
A: The lens is suitable for compact inspection, positioning, measurement, embedded machine vision, and other applications where a wide field of view is needed without significant geometric distortion.

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